教学管理系统——利用java和mysql来实现

 利用java和mysql实现教学管理系统。教学管理系统主要是在eclipse利用java代码完成编写，并与数据库进行连接，使得两边都能控制数据库的数据变化。仅供初学者参考。

每学期学校都要开设—定的课程，提供给学生根据自己的情况来选择。最后的选课结果不但需要给出学生的课表，也要把选课名单提供给任课教师进行期末成绩的评定。
1 系统需求分析
1.1系统功能分析
（1）课程设置，包括：增加、删除、查询和修改课程信息。
（2）课程时间和教室的安排，以及课程清单打印输出。
（3）学生选课和学生课表的打印输出。
（4）课程学生名单的打印输出和期末成绩输入。
（5）成绩查询、报表。
1.2系统功能模块设计（划分）
系统各功能模块的关系如图 1 所示。

1.3 与其它系统的关系
教学管理信息系统同样是校园信息管理系统的一个有机组成部分。需要从学生信息管理系统获取学生的个人信息，从教师信息管理系统获取任课教师的相关信息。同时，提供的成绩单为其他系统提供必要的参考。

2：课程设计目的
2.1：建立一个教学管理系统，更多的是实现教学系统的信息共享，使用者不仅仅是教务管理人员，还能是老师和学生，老师可以查看自己的教授课程和课程安排；学生可以通过此系统完成个人信息，选课信息的输入，查看期末考试成绩排名等。系统提供了一个平台使得不同角色能查找到自己的信息，却又没有侵犯到他人信息；
2.2：锻炼学生java知识和数据库相结合的综合运用能力，将书本上的知识与现实联系起来，吸引学生的兴趣，将学习融会贯通。

3、总体设计（含背景知识或基本原理与算法、或模块介绍、设
计步骤等）
3.1：总体模块：教学管理系统是将老师，学生，课程信息紧密结合起来，我设置了7个数据表，分别是代表用户登录界面的userpass表，学生信息student表，老师信息teacher表，课程信息course表，课程状态coursestate表，学生选课信息selectcourse表，学生成绩score表；
3.2：子类模块：每个数据表均实现了一定的功能，最开始是一个用户账号密码登录页面，只有登进账户才能对数据进行操作，学生老师课程表等数据表包括数据的添加，修改，删除和查找等操作。在学生成绩的表里面加上了一个总分排名的程序，将同学的分数进行相加并自动进行总分排名；
3.3：组件模块：利用java知识点创造组件，添加组件，加载驱动，进行连接，添加监视动作，如：添加学生信息按钮等，每个数据表都添加了很多按钮组件，不同的功能还会跳出不同的子界面，如点击添加学生信息按钮就会出现学生信息子界面，可对学生信息进行输入如学号，姓名，班级。
3.4：驱动连接模块：
Class.forName(“com.mysql.jdbc.Driver”);此语句适用于mysql5.5版本的情况，高版本的mysql没有测试过，不知道可不可以。
并使用以下语句进行连接：jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql+"&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT；3306是表示连接地址，基本上连接地址不要更改;jiaoxueguanlixit表示你所要连接的数据库名；笔者后面增加了一个用户名和密码，创造了一个登陆界面，后面会提及。

4：详细的代码及展示图：
一：登录界面

利用eclipse做出登录界面，然后在数据库里面进行用户名和密码的定义，笔者创造了一个用户名为zhangsan，密码为12345678的合法用户。

只要登录成功就会出现“登录成功界面”。

以下是控制登录代码：

package 教学管理系统;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.JTextField;public class Login extends JFrame implements ActionListener {private static final long serialVersionUID = 5252772035964963789L;
private JPanel pan = new JPanel();
private JLabel namelab = new JLabel("用户名");
private JLabel passlab = new JLabel("密码");
private JTextField nametext = new JTextField();
private JPasswordField passtext = new JPasswordField();
public JButton denglu = new JButton("登录");
public JButton chongzhi = new JButton("重置");
ImageIcon image;
public Login(){this.setLocation(550, 250);Font font = new Font("宋体",Font.BOLD,12);super.setTitle("欢迎登录教务系统");pan.setLayout(null);namelab.setBounds(20,20,60,30);nametext.setBounds(90,20,140,30);passlab.setBounds(20,60,60,30);passtext.setBounds(90,60,140,30);denglu.setBounds(30,120,90,20);chongzhi.setBounds(140,120,90,20);pan.add(namelab);pan.add(nametext);pan.add(passlab);pan.add(passtext);pan.add(denglu);pan.add(chongzhi);     passtext.setFont(font);chongzhi.setFont(font);denglu.addActionListener(this);chongzhi.addActionListener(this);super.add(pan);super.setSize(300,200);super.setVisible(true);passtext.addKeyListener(new KeyAdapter() {public  void keyPressed(KeyEvent e2) {if(e2.getKeyChar()==KeyEvent.VK_ENTER) {//如果密码是enter键denglu.doClick();//点击登录按钮} } });
}
public static void main(String []args){new Login();
}public void actionPerformed(ActionEvent arg0) {if(arg0.getSource()==denglu){denglu();}else if (arg0.getSource()==chongzhi){chongzhi();}}//登录按钮的事件处理函数public void denglu(){Jdbc d  = new Jdbc();String username = nametext.getText();char[] password = passtext.getPassword();if(d.compare(username, password)){JOptionPane.showMessageDialog(null, "登陆成功！");dispose();new SystemUI();}}//重置按钮触发后的事件处理函数public void chongzhi() {nametext.setText("");passtext.setText("");}
}
class Jdbc {Connection con = null;Statement statement = null;ResultSet res = null;String driver = "com.mysql.jdbc.Driver";String url  = "jdbc:mysql://127.0.0.1:3306/jiaoxueguanlixit?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8";String name = "zhangsan";String passwd = "12345678";public Jdbc(){try{Class.forName(driver);Connection con = DriverManager.getConnection(url,name,passwd);//与数据库建立连接；statement = con.createStatement();}catch(ClassNotFoundException e){System.out.println("对不起，找不到这个Driver");e.printStackTrace();}catch(SQLException e){e.printStackTrace();}catch(Exception e){e.printStackTrace();}}//对比用户名和密码是不匹配public boolean compare(String username,char[] password){String pwd = String.valueOf(password);boolean m = false;String sql = "select userpass from userpass where username='"+username+"'";try{res = statement.executeQuery(sql);if(res.next()){String pa = res.getString(1);System.out.println(pa+" " +pwd);if(pa.equals(pwd)){m = true;}else {JOptionPane.showMessageDialog(null, "密码错误！");}}else {JOptionPane.showMessageDialog(null, "用户名不存在！");} }catch(SQLException e){e.printStackTrace();}return m;}
}

二：登录进去之后就会出现一个信息界面：
里面包含了老师信息，学生信息，课程信息，选课信息和成绩管理。

2.1教师信息控制代码：
包括添加，修改，删除，搜索，刷新操作。
添加一个老师信息：

更改老师的信息：

删除老师信息：选中删除的一行：

搜索教师信息：

package 教学管理系统;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableCellRenderer;
import java.util.Date;public class Teacher {Vector<Object> columnNames;private Vector<Vector<Object>> rowData = new Vector<Vector<Object>>();static JTable table1=null;//定义数据库需要的全局变量PreparedStatement ps=null;Connection ct=null;ResultSet rs=null;//将对数据库查询的结果保存进resultset的对象rs中public Teacher(){columnNames=new Vector<Object>();//设置列名columnNames.add("工号");columnNames.add("姓名");columnNames.add("部门");//rowData可以存放多行,开始从数据库里取    try {   String userMySql="zhangsan"; String passwordMySql="12345678";//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接，并获取连接对象ctct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select * from teacher");//向mysql发送动态的sql语句rs=ps.executeQuery();//使用select语句时用executeQuery执行，executeupdate用于执行insert，update，delete，execute用于返回多个结果集的语句。while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getInt(1));hang.add(rs.getString(2));hang.add(rs.getString(3));//加入到rowDatarowData.add(hang);}} catch (Exception e) {e.printStackTrace();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}table1=new JTable(rowData,columnNames) {private static final long serialVersionUID=-3229560868878458304L;public boolean isCellEditable(int row,int column) {return false;}};table1.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table1.setDefaultRenderer(Object.class, tcr);}//添加教师的信息；public void addTeacher() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame AddTea = new JFrame("添加教师信息");AddTea.setSize(250, 270);AddTea.setLocation(600, 300);JPanel addtea = new JPanel();JLabel teacherid = new JLabel("工号");JLabel teachername = new JLabel("姓名");JLabel teacherdepartment = new JLabel("部门");JTextField teacheridtext  = new JTextField();JTextField teachernametext = new JTextField();JTextField teacherdepartmenttext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");addtea.setLayout(null);teacherid.setBounds(5,5,70,20);teacheridtext.setBounds(80,5,120,20);teachername.setBounds(5,30,70,20);teachernametext.setBounds(80,30,120,20);teacherdepartment.setBounds(5,60,70,20);teacherdepartmenttext.setBounds(80,60,120,20);ok.setBounds(50,190,60,20);reset.setBounds(130,190,60,20);addtea.add(teacherid);addtea.add(teacheridtext);addtea.add(teachername);addtea.add(teachernametext);addtea.add(teacherdepartment);addtea.add(teacherdepartmenttext);addtea.add(ok);addtea.add(reset);AddTea.add(addtea);AddTea.setVisible(true);AddTea.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try { String userMySql="zhangsan"; String passwordMySql="12345678";String  name = teachernametext.getText();String department = teacherdepartmenttext.getText();int id = Integer.valueOf(teacheridtext.getText()).intValue();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("insert into teacher values('"+id+"','"+name+"','"+department+"')");ps.executeUpdate();JOptionPane.showMessageDialog(null, "添加成功！");AddTea.dispose();SystemUI.clickable();addTeacher();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "添加失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {teacheridtext.setText("");teachernametext.setText("");teacherdepartmenttext.setText("");}});}
//修改教师的信息；public void updateTeacher() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame UpdateTea = new JFrame("修改教师信息");UpdateTea.setSize(250, 290);UpdateTea.setLocation(600, 300);JPanel updatetea = new JPanel();JLabel upid = new JLabel("要修改的工号");JLabel upname = new JLabel("要改成的姓名");JLabel updepartment = new JLabel("要改成的部门");JTextField upidtext = new JTextField();JTextField upnametext = new JTextField();JTextField updepartmenttext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");updatetea.setLayout(null);upid.setBounds(5,30,100,20);upidtext.setBounds(110,30,120,20);upname.setBounds(5,60,100,20);upnametext.setBounds(110,60,120,20);updepartment.setBounds(5,90,100,20);updepartmenttext.setBounds(110,90,120,20);ok.setBounds(50,210,60,20);reset.setBounds(120,210,60,20);updatetea.add(upid);updatetea.add(upidtext); updatetea.add(upname);updatetea.add(upnametext);updatetea.add(updepartment);updatetea.add(updepartmenttext);updatetea.add(ok);updatetea.add(reset);UpdateTea.add(updatetea);UpdateTea.setVisible(true);UpdateTea.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {   String userMySql="zhangsan"; String passwordMySql="12345678";//String id = upidtext.getText();String name = upnametext.getText();String department = updepartmenttext.getText();int id = Integer.valueOf(upidtext.getText()).intValue();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("update teacher set teachername ='"+name+"',teacherdepartment ='"+department+"' where teacherid='"+id+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "修改成功！");UpdateTea.dispose();SystemUI.clickable();addTeacher();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "修改失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {upidtext.setText(""); upnametext.setText("");updepartmenttext.setText("");}});}
//删除教师信息public void deleteTeacher() {// TODO 自动生成的方法存根int row = table1.getSelectedRow();if ( row >= 0 ) {String string[] = new String[5];string[0] = String.valueOf(table1.getValueAt(row, 0));string[1] = String.valueOf(table1.getValueAt(row, 1));try {  String userMySql="zhangsan"; String passwordMySql="12345678";//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("delete from teacher where teacherid='"+string[0]+"' and teachername='"+string[1]+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "删除成功！");refreshTeacher();row=-1;} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "删除失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}else {JOptionPane.showMessageDialog(null, "请选中要删除的行！");}}public void searchTeacher() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame SeaTea = new JFrame("查找教师信息");SeaTea.setSize(250, 100);SeaTea.setLocation(600, 300);JPanel seatea = new JPanel();JLabel tno = new JLabel("请输入工号");JTextField tnotext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");seatea.setLayout(null);tno.setBounds(5,5,70,20);tnotext.setBounds(80,5,120,20);ok.setBounds(50,30,60,20);reset.setBounds(130,30,60,20);seatea.add(tno);seatea.add(tnotext);seatea.add(ok);seatea.add(reset);SeaTea.add(seatea);SeaTea.setVisible(true);SeaTea.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {columnNames=new Vector<Object>();//设置列名columnNames.add("工号");columnNames.add("姓名");columnNames.add("部门");String str = tnotext.getText();int count=0;try {  String userMySql="zhangsan"; String passwordMySql="12345678";//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");if(!tnotext.getText().trim().equals("")) {ps=ct.prepareStatement("select * from teacher where teacherid='"+str+"'");rs=ps.executeQuery();}if(tnotext.getText().trim().equals("")) {ps=ct.prepareStatement("select * from teacher ");rs=ps.executeQuery();JOptionPane.showMessageDialog(null, "请输入查询信息！");}while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getInt(1));hang.add(rs.getString(2));hang.add(rs.getString(3));//加入到rowDatarowData.add(hang);count++;}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "查询失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}if(count!=0) {table1 = new JTable(rowData,columnNames){private static final long serialVersionUID = -1545099432791772807L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table1.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table1.setDefaultRenderer(Object.class, tcr);SystemUI.scrollPane1.setViewportView(table1);SeaTea.dispose();SystemUI.clickable();}if(count==0) { JOptionPane.showMessageDialog(null, "查无此人！");}}   });}public void refreshTeacher() {// TODO 自动生成的方法存根new Teacher();SystemUI.scrollPane1.setViewportView(Teacher.table1);}
}

学生信息和老师信息的操作大致差不多：代码如下：

package 教学管理系统;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableCellRenderer;public class Student {private Vector<Vector<Object>> rowData = new Vector<Vector<Object>>();String userMySql="zhangsan"; String passwordMySql="12345678";//Vector<Object> rowData,columnNames;Vector<Object> columnNames;static JTable table2=null;//定义数据库需要的全局变量PreparedStatement ps=null;Connection ct=null;ResultSet rs=null;public Student(){columnNames=new Vector<Object>();//设置列名columnNames.add("学号");columnNames.add("姓名");columnNames.add("班级");        //rowData可以存放多行,开始从数据库里取try {String userMySql="zhangsan"; String passwordMySql="12345678";//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select * from student");rs=ps.executeQuery();while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getInt(1));hang.add(rs.getString(2));hang.add(rs.getString(3));//加入到rowDatarowData.add(hang);}} catch (Exception e) {e.printStackTrace();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}table2 = new JTable(rowData,columnNames){private static final long serialVersionUID = -4333506764666173598L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table2.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table2.setDefaultRenderer(Object.class, tcr);}public void refreshStudent() {// TODO 自动生成的方法存根new Student();SystemUI.scrollPane2.setViewportView(Student.table2);}public void searchStudent() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame SeaStu = new JFrame("查找学生信息");SeaStu.setSize(250, 100);SeaStu.setLocation(600, 300);JPanel seastu = new JPanel();JLabel sno = new JLabel("请输入学号");JTextField snotext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");seastu.setLayout(null);sno.setBounds(5,5,70,20);snotext.setBounds(80,5,120,20);ok.setBounds(50,30,60,20);reset.setBounds(130,30,60,20);seastu.add(sno);seastu.add(snotext);seastu.add(ok);seastu.add(reset);SeaStu.add(seastu);SeaStu.setVisible(true);SeaStu.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {columnNames=new Vector<Object>();//设置列名columnNames.add("学号");columnNames.add("姓名");columnNames.add("班级");String str = snotext.getText();//rowData = new Vector<Object>();int count=0;//rowData可以存放多行,开始从数据库里取try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");if(!snotext.getText().trim().equals("")) {ps=ct.prepareStatement("select * from student where studentid='"+str+"'");rs=ps.executeQuery();}if(snotext.getText().trim().equals("")) {ps=ct.prepareStatement("select * from student ");JOptionPane.showMessageDialog(null, "请输入查询信息！");rs=ps.executeQuery(); }while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getInt(1));hang.add(rs.getString(2));hang.add(rs.getString(3));//加入到rowDatarowData.add(hang);count++;}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "查询失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}if(count!=0) {table2 = new JTable(rowData,columnNames){private static final long serialVersionUID = -8131400305374145108L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table2.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table2.setDefaultRenderer(Object.class, tcr);SystemUI.scrollPane2.setViewportView(table2);SeaStu.dispose();SystemUI.clickable();}if(count==0) {JOptionPane.showMessageDialog(null, "查无此人！");}}   });reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {snotext.setText("");}});}public void deleteStudent() {// TODO 自动生成的方法存根int row = table2.getSelectedRow();if ( row >= 0 ) {String string[] = new String[3];string[0] = String.valueOf(table2.getValueAt(row, 0));string[1] = String.valueOf(table2.getValueAt(row, 1));try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("delete from student where studentid='"+string[0]+"' and studentname='"+string[1]+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "删除成功！");refreshStudent();row=-1;} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "删除失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}else {JOptionPane.showMessageDialog(null, "请选中要删除的行！");}}public void addStudent() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame AddStu = new JFrame("添加学生信息");AddStu.setSize(250, 270);AddStu.setLocation(600, 300);JPanel addStu = new JPanel();JLabel sno = new JLabel("学号");JLabel sname = new JLabel("姓名");JLabel sclass = new JLabel("班级");JTextField snotext  = new JTextField();JTextField snametext = new JTextField();JTextField sclasstext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");addStu.setLayout(null);sno.setBounds(5,5,70,20);snotext.setBounds(80,5,120,20);sname.setBounds(5,30,70,20);snametext.setBounds(80,30,120,20);sclass.setBounds(5,60,70,20);sclasstext.setBounds(80,60,120,20);ok.setBounds(50,190,60,20);reset.setBounds(130,190,60,20);addStu.add(sno);addStu.add(snotext);addStu.add(sname);addStu.add(snametext);addStu.add(sclass);addStu.add(sclasstext);addStu.add(ok);addStu.add(reset);AddStu.add(addStu);AddStu.setVisible(true);AddStu.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String userMySql="zhangsan"; String passwordMySql="12345678";String name = snametext.getText();String sclass = sclasstext.getText();int no = Integer.valueOf(snotext.getText()).intValue();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("insert into student values('"+no+"','"+name+"','"+sclass+"')");ps.executeUpdate();JOptionPane.showMessageDialog(null, "添加成功！");AddStu.dispose();SystemUI.clickable();refreshStudent();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "添加失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {snotext.setText("");snametext.setText("");sclasstext.setText("");}});}
//修改学生信息；public void updateStudent() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame UpdateStu = new JFrame("修改学生信息");UpdateStu.setSize(250, 250);UpdateStu.setLocation(600, 300);JPanel updatestu = new JPanel();JLabel upno = new JLabel("要修改的学号");JLabel ssex = new JLabel("要改成的姓名");JLabel upclass = new JLabel("要改成的班级");JTextField upnotext = new JTextField();JTextField ssextext  = new JTextField();JTextField upclasstext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");updatestu.setLayout(null);upno.setBounds(5,5,100,20);upnotext.setBounds(110,5,120,20); ssex.setBounds(5,30,100,20);ssextext.setBounds(110,30,120,20);upclass.setBounds(5,60,100,20);upclasstext.setBounds(110,60,120,20);ok.setBounds(50,170,60,20);reset.setBounds(120,170,60,20);updatestu.add(upno);updatestu.add(upnotext); updatestu.add(ssex);updatestu.add(ssextext);updatestu.add(upclass);updatestu.add(upclasstext);updatestu.add(ok);updatestu.add(reset);UpdateStu.add(updatestu);UpdateStu.setVisible(true);UpdateStu.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String sclass = upclasstext.getText();String sname=ssextext.getText();int yno = Integer.valueOf(upnotext.getText()).intValue();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("update student set  class ='"+sclass+"',studentname='"+sname+"' where studentid='"+yno+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "修改成功！");UpdateStu.dispose();SystemUI.clickable();refreshStudent();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "修改失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {upclasstext.setText("");}});}}

课程信息和老师信息操作差不多，代码如下：

package 教学管理系统;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableCellRenderer;public class Course {private Vector<Vector<Object>> rowData = new Vector<Vector<Object>>();String userMySql="zhangsan"; String passwordMySql="12345678";Vector<Object> columnNames;//定义数据库需要的全局变量PreparedStatement ps=null;Connection ct=null;ResultSet rs=null;static JTable table3=null;public Course(){columnNames=new Vector<Object>();//设置列名columnNames.add("课程号");columnNames.add("课程名");columnNames.add("先修课课程号");columnNames.add("学分");columnNames.add("类型");   //rowData = new Vector<Object>();//rowData可以存放多行,开始从数据库里取try {String userMySql="zhangsan"; String passwordMySql="12345678";//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select * from course");rs=ps.executeQuery();while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getInt(1));hang.add(rs.getString(2));hang.add(rs.getString(3));hang.add(rs.getInt(4));hang.add(rs.getString(5));//加入到rowDatarowData.add(hang);}} catch (Exception e) {e.printStackTrace();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}table3 = new JTable(rowData,columnNames){private static final long serialVersionUID = 6843971351064905400L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table3.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table3.setDefaultRenderer(Object.class, tcr);}public void addCourse() {           //增加课程// TODO 自动生成的方法存根SystemUI.unclickable();JFrame AddCou = new JFrame("添加课程信息");AddCou.setSize(250, 250);AddCou.setLocation(600, 300);JPanel addCou = new JPanel();JLabel cno = new JLabel("课程号");JLabel cname = new JLabel("课程名");JLabel cpno = new JLabel("先修课");JLabel credit = new JLabel("学分");JLabel cremark = new JLabel("类型");JTextField cnotext  = new JTextField();JTextField cnametext = new JTextField();JTextField cpnotext  = new JTextField();JTextField credittext  = new JTextField();JTextField cremarktext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");addCou.setLayout(null);cno.setBounds(5,5,70,20);cnotext.setBounds(80,5,120,20);cname.setBounds(5,30,70,20);cnametext.setBounds(80,30,120,20);cpno.setBounds(5,60,70,20);cpnotext.setBounds(80,60,120,20);credit.setBounds(5,90,70,20);credittext.setBounds(80,90,120,20);cremark.setBounds(5,120,70,20);cremarktext.setBounds(80,120,120,20);ok.setBounds(50,150,60,20);reset.setBounds(130,150,60,20);addCou.add(cno);addCou.add(cnotext);addCou.add(cname);addCou.add(cnametext);addCou.add(cpno);addCou.add(cpnotext);addCou.add(credit);addCou.add(credittext);addCou.add(cremark);addCou.add(cremarktext);addCou.add(ok);addCou.add(reset);AddCou.add(addCou);AddCou.setVisible(true);AddCou.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String userMySql="zhangsan"; String passwordMySql="12345678";String no = cnotext.getText();String  name = cnametext.getText();String pno = cpnotext.getText();String remark = cremarktext.getText();int credit = Integer.valueOf(credittext.getText()).intValue();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");String sql;sql = "insert into course values('"+no+"','"+name+"','"+pno+"',"+credit+",'"+remark+"')";ps=ct.prepareStatement(sql);ps.executeUpdate();JOptionPane.showMessageDialog(null, "添加成功！");AddCou.dispose();SystemUI.clickable();refreshCourse();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "添加失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {cnotext.setText("");cnametext.setText("");cpnotext.setText("");credittext.setText("");cremarktext.setText("");}});}public void updateCourse() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame UpdateCou = new JFrame("修改课程信息");UpdateCou.setSize(250, 200);UpdateCou.setLocation(600, 300);JPanel updatecou = new JPanel();JLabel ycno = new JLabel("要修改的课程号");JLabel cpno = new JLabel("要改成的先修课");JLabel credit = new JLabel("要改成的学分");JLabel cremark = new JLabel("要改成的类型");JTextField ycnotext = new JTextField();JTextField cpnotext  = new JTextField();JTextField credittext  = new JTextField();JTextField cremarktext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");updatecou.setLayout(null);ycno.setBounds(5,5,100,20);ycnotext.setBounds(110,5,120,20);cpno.setBounds(5,30,100,20);cpnotext.setBounds(110,30,120,20);credit.setBounds(5,60,100,20);credittext.setBounds(110,60,120,20);cremark.setBounds(5,90,100,20);cremarktext.setBounds(110,90,120,20);ok.setBounds(50,130,60,20);reset.setBounds(120,130,60,20);updatecou.add(ycno);updatecou.add(ycnotext); updatecou.add(cpno);updatecou.add(cpnotext);updatecou.add(credit);updatecou.add(credittext);updatecou.add(cremark);updatecou.add(cremarktext);updatecou.add(ok);updatecou.add(reset);UpdateCou.add(updatecou);UpdateCou.setVisible(true);UpdateCou.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String yno = ycnotext.getText();String pno = cpnotext.getText();String remark = cremarktext.getText();int credit = Integer.valueOf(credittext.getText()).intValue();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");String sql;                sql = "update course set beforecourse ='"+pno+"', xuefen ='"+credit+"', leixing ='"+remark+"' where courseid='"+yno+"'";ps=ct.prepareStatement(sql);ps.executeUpdate();JOptionPane.showMessageDialog(null, "修改成功！");UpdateCou.dispose();SystemUI.clickable();refreshCourse();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "修改失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {ycnotext.setText(""); cpnotext.setText("");credittext.setText("");cremarktext.setText("");}});}public void deleteCourse() {// TODO 自动生成的方法存根int row = table3.getSelectedRow();if ( row >= 0 ) {String string[] = new String[3];string[0] = String.valueOf(table3.getValueAt(row, 0));string[1] = String.valueOf(table3.getValueAt(row, 1));try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("delete from course where courseid='"+string[0]+"' and coursename='"+string[1]+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "删除成功！");refreshCourse();row=-1;} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "删除失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}else {JOptionPane.showMessageDialog(null, "请选中要删除的行！");}}public void searchCourse() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame SeaCou = new JFrame("查找课程信息");SeaCou.setSize(250, 100);SeaCou.setLocation(600, 300);JPanel seacou = new JPanel();JLabel cno = new JLabel("请输入课程号");JTextField cnotext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");seacou.setLayout(null);cno.setBounds(5,5,80,20);cnotext.setBounds(90,5,120,20);ok.setBounds(50,30,60,20);reset.setBounds(130,30,60,20);seacou.add(cno);seacou.add(cnotext);seacou.add(ok);seacou.add(reset);SeaCou.add(seacou);SeaCou.setVisible(true);SeaCou.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {columnNames=new Vector<Object>();//设置列名columnNames.add("课程号");columnNames.add("课程名");columnNames.add("先修课课程号");columnNames.add("学分");columnNames.add("类型");String str = cnotext.getText();//rowData = new Vector<Object>();int count=0;//rowData可以存放多行,开始从数据库里取try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");if(!cnotext.getText().trim().equals("")) {ps=ct.prepareStatement("select * from course where courseid='"+str+"'");rs=ps.executeQuery();}else if(cnotext.getText().trim().equals("")) {ps=ct.prepareStatement("select * from course ");rs=ps.executeQuery();JOptionPane.showMessageDialog(null, "请输入查询信息！");}while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getString(1));hang.add(rs.getString(2));hang.add(rs.getString(3));hang.add(rs.getInt(4));hang.add(rs.getString(5));//加入到rowDatarowData.add(hang);count++;}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "查询失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}if(count!=0) {table3 = new JTable(rowData,columnNames){private static final long serialVersionUID = -8656035973692724899L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table3.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table3.setDefaultRenderer(Object.class, tcr);SystemUI.scrollPane3.setViewportView(table3);SeaCou.dispose();SystemUI.clickable();}if(count==0) {JOptionPane.showMessageDialog(null, "没有查询到相关消息！");}}   });reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {cnotext.setText("");}});}public void refreshCourse() {// TODO 自动生成的方法存根new Course();SystemUI.scrollPane3.setViewportView(Course.table3);}}

选课信息和老师信息差不多，代码如下：

package 教学管理系统;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableCellRenderer;public class SelectCourse {String userMySql="zhangsan"; String passwordMySql="12345678";private Vector<Vector<Object>> rowData = new Vector<Vector<Object>>();//Vector<Object> rowData,columnNames;Vector<Object> columnNames;//定义数据库需要的全局变量PreparedStatement ps=null;Connection ct=null;ResultSet rs=null;static JTable table5=null;public SelectCourse(){columnNames=new Vector<Object>();//设置列名columnNames.add("学号");columnNames.add("姓名");columnNames.add("课程号");columnNames.add("课程名");     // rowData = new Vector<Object>();//rowData可以存放多行,开始从数据库里取try {String userMySql="zhangsan"; String passwordMySql="12345678";//加载驱动Class.forName("com.mysql.jdbc.Driver");System.out.println("加载成功！");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select * from selectcourse");rs=ps.executeQuery();while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getString(1));hang.add(rs.getString(2));hang.add(rs.getString(3));hang.add(rs.getString(4));//加入到rowDatarowData.add(hang);}} catch (Exception e) {e.printStackTrace();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}table5= new JTable(rowData,columnNames){private static final long serialVersionUID = -8736911822989769111L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table5.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table5.setDefaultRenderer(Object.class, tcr);}public void addSelCou() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame Addse = new JFrame("添加选课信息");Addse.setSize(250, 150);Addse.setLocation(600, 300);JPanel addse = new JPanel();JLabel sesno = new JLabel("学号");        JLabel secno = new JLabel("课程号");JTextField sesnotext  = new JTextField();      JTextField secnotext = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");addse.setLayout(null);sesno.setBounds(5,5,70,20);sesnotext.setBounds(80,5,120,20);secno.setBounds(5,30,70,20);secnotext.setBounds(80,30,120,20);ok.setBounds(50,70,60,20);reset.setBounds(130,70,60,20);addse.add(sesno);addse.add(sesnotext);addse.add(secno);addse.add(secnotext);      addse.add(ok);addse.add(reset);Addse.add(addse);Addse.setVisible(true);Addse.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String sno = sesnotext.getText();String cno = secnotext.getText();//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("insert into selectcourse values('"+sno+"',(select studentname from student where studentid='"+sno+"'),'"+cno+"',(select coursename from course where courseid='"+cno+"'))");ps.executeUpdate();JOptionPane.showMessageDialog(null, "添加成功！");Addse.dispose();SystemUI.clickable();refreshSelCou();} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "添加失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}   });reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {sesnotext.setText("");secnotext.setText("");}});}public void deleteSelCou() {// TODO 自动生成的方法存根int row = table5.getSelectedRow();if ( row >= 0 ) {String string[] = new String[4];string[0] = String.valueOf(table5.getValueAt(row, 0));string[1] = String.valueOf(table5.getValueAt(row, 1));string[2] = String.valueOf(table5.getValueAt(row, 2));string[3] = String.valueOf(table5.getValueAt(row, 3));try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("delete from selectcourse where studentid='"+string[0]+"' and studentname='"+string[1]+"' and courseid='"+string[2]+"' and coursename='"+string[3]+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "删除成功！");refreshSelCou();row=-1;} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "删除失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}else {JOptionPane.showMessageDialog(null, "请选中要删除的行！");}}public void searchSelCou() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame SeaSelCou = new JFrame("查找课程信息");SeaSelCou.setSize(250, 150);SeaSelCou.setLocation(600, 300);JPanel seaselcou = new JPanel();JLabel cno = new JLabel("请输入课程号");JTextField cnotext  = new JTextField();JLabel sno = new JLabel("请输入学号");JTextField snotext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");seaselcou.setLayout(null);cno.setBounds(5,5,80,20);cnotext.setBounds(90,5,120,20);sno.setBounds(5,30,80,20);snotext.setBounds(90,30,120,20);ok.setBounds(50,70,60,20);reset.setBounds(130,70,60,20);seaselcou.add(cno);seaselcou.add(cnotext);seaselcou.add(sno);seaselcou.add(snotext);seaselcou.add(ok);seaselcou.add(reset);SeaSelCou.add(seaselcou);SeaSelCou.setVisible(true);SeaSelCou.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {columnNames=new Vector<Object>();//设置列名columnNames.add("学号");columnNames.add("姓名");columnNames.add("课程号");columnNames.add("课程名");String str = cnotext.getText();String str1 = snotext.getText();// rowData = new Vector<Object>();int count=0;//rowData可以存放多行,开始从数据库里取try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit","zhangsan","12345678");if(snotext.getText().trim().equals("")&&!cnotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from selectcourse where courseid='"+str+"'");rs=ps.executeQuery();}if(cnotext.getText().trim().equals("")&&!snotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from selectcourse where studentid='"+str1+"'");rs=ps.executeQuery();}if(!cnotext.getText().trim().equals("")&&!snotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from selectcourse where studentid='"+str1+"' and courseid='"+str+"'");rs=ps.executeQuery();}if(cnotext.getText().trim().equals("")&&snotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from selectcourse");rs=ps.executeQuery();JOptionPane.showMessageDialog(null, "请输入查询信息！");}while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getString(1));hang.add(rs.getString(2));hang.add(rs.getString(3));hang.add(rs.getString(4));//加入到rowDatarowData.add(hang);count++;}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "查询失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}if(count!=0) {table5 = new JTable(rowData,columnNames){                       private static final long serialVersionUID = -3692229347549819226L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table5.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table5.setDefaultRenderer(Object.class, tcr);SystemUI.scrollPane5.setViewportView(table5);SeaSelCou.dispose();SystemUI.clickable();}if(count==0) {JOptionPane.showMessageDialog(null, "没有查询到相关信息！");}}   });reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {cnotext.setText("");snotext.setText("");}});    }public void refreshSelCou() {// TODO 自动生成的方法存根new SelectCourse();SystemUI.scrollPane5.setViewportView(SelectCourse.table5);}}

成绩信息和老师信息也差不多，不过加了一个创新点就是可以对输入学生的总分成绩进行排名，代码如下：

package 教学管理系统;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DecimalFormat;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.ListSelectionModel;
import javax.swing.event.InternalFrameAdapter;
import javax.swing.event.InternalFrameEvent;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;public class Score {String userMySql="zhangsan"; String passwordMySql="12345678";private Vector<Vector<Object>> rowData = new Vector<Vector<Object>>();//Vector<Object> rowData;Vector<Object> columnNames;//定义数据库需要的全局变量PreparedStatement ps=null;Connection ct=null;ResultSet rs=null;static JTable table4=null;static JTable table6=null;static JTable table7=null;public Score(){columnNames=new Vector<Object>();//设置列名columnNames.add("学号");columnNames.add("姓名");columnNames.add("课程号");columnNames.add("课程名");columnNames.add("成绩");//rowData = new Vector<Object>();//rowData可以存放多行,开始从数据库里取try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select * from score");rs=ps.executeQuery();while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getString(1));hang.add(rs.getString(2));hang.add(rs.getString(3));hang.add(rs.getString(4));hang.add(rs.getInt(5));//加入到rowDatarowData.add(hang);}} catch (Exception e) {e.printStackTrace();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}table4 = new JTable(rowData,columnNames){private static final long serialVersionUID = 1525421110274312344L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table4.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table4.setDefaultRenderer(Object.class, tcr);}public void addScore() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame Addsc = new JFrame("添加成绩信息");Addsc.setSize(250, 180);Addsc.setLocation(600, 300);JPanel addsc = new JPanel();JLabel scsno = new JLabel("学号");        JLabel sccno = new JLabel("课程号");JLabel score = new JLabel("成绩");JTextField scsnotext  = new JTextField();      JTextField sccnotext = new JTextField();JTextField scoretext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");addsc.setLayout(null);scsno.setBounds(5,5,70,20);scsnotext.setBounds(80,5,120,20);sccno.setBounds(5,30,70,20);sccnotext.setBounds(80,30,120,20);score.setBounds(5,60,70,20);scoretext.setBounds(80,60,120,20);ok.setBounds(50,100,60,20);reset.setBounds(130,100,60,20);addsc.add(scsno);addsc.add(scsnotext);addsc.add(sccno);addsc.add(sccnotext);addsc.add(score);addsc.add(scoretext);        addsc.add(ok);addsc.add(reset);Addsc.add(addsc);Addsc.setVisible(true);Addsc.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String sno = scsnotext.getText();String cno = sccnotext.getText();int score = Integer.valueOf(scoretext.getText()).intValue();int count=0;//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select studentname from selectcourse where studentid='"+sno+"' and courseid='"+cno+"'");rs=ps.executeQuery();while(rs.next()){count++;}if(count==0) {JOptionPane.showMessageDialog(null, "此人没有选此课程！");}if(count!=0) {ps=ct.prepareStatement("insert into score values('"+sno+"',(select studentname from selectcourse where studentid='"+sno+"' and courseid='"+cno+"'),'"+cno+"',(select coursename from selectcourse where courseid='"+cno+"' and studentid='"+sno+"'),"+score+")");ps.executeUpdate();JOptionPane.showMessageDialog(null, "添加成功！");Addsc.dispose();SystemUI.clickable();refreshScore();}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "添加失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {scsnotext.setText("");sccnotext.setText("");scoretext.setText("");}});}public void updateScore() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame UpdateSC = new JFrame("修改成绩信息");UpdateSC.setSize(250, 240);UpdateSC.setLocation(600, 300);JPanel updatesc = new JPanel();JLabel yscsno = new JLabel("要修改的学号");JLabel scsno = new JLabel("要改成的学号");JLabel ysccno = new JLabel("要修改的课程号");        JLabel sccno = new JLabel("要改成的课程号");JLabel score = new JLabel("成绩");JTextField yscsnotext = new JTextField();JTextField scsnotext  = new JTextField();JTextField ysccnotext = new JTextField();      JTextField sccnotext = new JTextField();JTextField scoretext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");updatesc.setLayout(null);yscsno.setBounds(5,5,100,20);yscsnotext.setBounds(110,5,120,20);scsno.setBounds(5,30,100,20);scsnotext.setBounds(110,30,120,20);ysccno.setBounds(5,60,100,20);ysccnotext.setBounds(110,60,120,20);sccno.setBounds(5,90,100,20);sccnotext.setBounds(110,90,120,20);score.setBounds(5,120,100,20);scoretext.setBounds(110,120,120,20);ok.setBounds(50,160,60,20);reset.setBounds(120,160,60,20);updatesc.add(yscsno);updatesc.add(yscsnotext); updatesc.add(scsno);updatesc.add(scsnotext);updatesc.add(ysccno);updatesc.add(ysccnotext);updatesc.add(sccno);updatesc.add(sccnotext);updatesc.add(score);updatesc.add(scoretext);        updatesc.add(ok);updatesc.add(reset);UpdateSC.add(updatesc);UpdateSC.setVisible(true);UpdateSC.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {try {String ysno=yscsnotext.getText();String ycno=ysccnotext.getText();String sno = scsnotext.getText();String cno = sccnotext.getText();int score = Integer.valueOf(scoretext.getText()).intValue();int count=0;//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit","zhangsan","12345678");ps=ct.prepareStatement("select studentname from selectcourse where studentid='"+sno+"' and courseid='"+cno+"'");rs=ps.executeQuery();while(rs.next()){count++;}if(count==0) {JOptionPane.showMessageDialog(null, "此人没有选此课程！");}if(count!=0) {ps=ct.prepareStatement("update score set studentid ='"+sno+"', courseid ='"+cno+"',studentname=(select studentname from selectcourse where studentid='"+sno+"'and courseid ='"+cno+"'), coursename =(select coursename from selectcourse where courseid='"+cno+"'and studentid='"+sno+"'), score ="+score+" where studentid='"+ysno+"'and courseid='"+ycno+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "修改成功！");UpdateSC.dispose();SystemUI.clickable();refreshScore();}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "修改失败！");SystemUI.unclickable();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}});reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {scsnotext.setText("");sccnotext.setText("");scoretext.setText("");}});}public void deleteScore() {// TODO 自动生成的方法存根int row = table4.getSelectedRow();if ( row >= 0 ) {String string[] = new String[4];string[0] = (String) table4.getValueAt(row, 0);string[1] = (String) table4.getValueAt(row, 1);string[2] = (String) table4.getValueAt(row, 2);string[3] = (String) table4.getValueAt(row, 3);try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("delete from score where studentid='"+string[0]+"' and studentname='"+string[1]+"' and courseid='"+string[2]+"' and coursename='"+string[3]+"'");ps.executeUpdate();JOptionPane.showMessageDialog(null, "删除成功！");refreshScore();row=-1;} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "删除失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}}else {JOptionPane.showMessageDialog(null, "请选中要删除的行！");}}public void searchScore() {// TODO 自动生成的方法存根SystemUI.unclickable();JFrame SeaSC = new JFrame("查找成绩信息");SeaSC.setSize(250, 150);SeaSC.setLocation(600, 300);JPanel seasc = new JPanel();JLabel cno = new JLabel("请输入课程号");JTextField cnotext  = new JTextField();JLabel sno = new JLabel("请输入学号");JTextField snotext  = new JTextField();JButton ok = new JButton("确定");JButton reset = new JButton("重置");seasc.setLayout(null);cno.setBounds(5,5,80,20);cnotext.setBounds(90,5,120,20);sno.setBounds(5,30,80,20);snotext.setBounds(90,30,120,20);ok.setBounds(50,70,60,20);reset.setBounds(130,70,60,20);seasc.add(cno);seasc.add(cnotext);seasc.add(sno);seasc.add(snotext);seasc.add(ok);seasc.add(reset);SeaSC.add(seasc);SeaSC.setVisible(true);SeaSC.addWindowListener(new WindowAdapter(){@Overridepublic void windowClosing(WindowEvent e) {SystemUI.clickable();}});ok.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {columnNames=new Vector<Object>();//设置列名columnNames.add("学号");columnNames.add("姓名");columnNames.add("课程号");columnNames.add("课程名");columnNames.add("成绩");String str = cnotext.getText();String str1 = snotext.getText();//rowData = new Vector<Object>();int count=0;//rowData可以存放多行,开始从数据库里取try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit","zhangsan","12345678");if(snotext.getText().trim().equals("")&&!cnotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from score where courseid='"+str+"'");rs=ps.executeQuery();}if(cnotext.getText().trim().equals("")&&!snotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from score where studentid='"+str1+"'");rs=ps.executeQuery();}if(!cnotext.getText().trim().equals("")&&!snotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from score where studentid='"+str1+"' and courseid='"+str+"'");rs=ps.executeQuery();}if(cnotext.getText().trim().equals("")&&snotext.getText().trim().equals("")){ps=ct.prepareStatement("select * from score order by score desc ");rs=ps.executeQuery();JOptionPane.showMessageDialog(null, "请输入查询信息！");}while(rs.next()){//rowData可以存放多行Vector<Object> hang=new Vector<Object>();hang.add(rs.getString(1));hang.add(rs.getString(2));hang.add(rs.getString(3));hang.add(rs.getString(4));hang.add(rs.getInt(5));//加入到rowDatarowData.add(hang);count++;}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(null, "查询失败！");} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}if(count!=0) {table4 = new JTable(rowData,columnNames){private static final long serialVersionUID = -518524586936803727L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table4.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table4.setDefaultRenderer(Object.class, tcr);SystemUI.scrollPane4.setViewportView(table4);SeaSC.dispose();SystemUI.clickable();}if(count==0) {JOptionPane.showMessageDialog(null, "没有查询到相关消息！");}}   });reset.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent arg0) {cnotext.setText("");snotext.setText("");}});}public void refreshScore() {// TODO 自动生成的方法存根new Score();SystemUI.scrollPane4.setViewportView(Score.table4);}public void totalrank() {// TODO 自动生成的方法存根JFrame jf = new JFrame("总分排名");jf.setVisible(true);jf.setSize(250, 300);jf.setLocation(500,300);JScrollPane js=new JScrollPane();jf.add(js,BorderLayout.CENTER);columnNames=new Vector<Object>();//设置列名columnNames.add("名次");columnNames.add("学号");columnNames.add("总分");//rowData = new Vector<Object>();try {//加载驱动Class.forName("com.mysql.jdbc.Driver");//得到连接ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/jiaoxueguanlixit?user="+userMySql+"&password="+passwordMySql + "&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");ps=ct.prepareStatement("select studentid,sum(score) sum_grade from score group by score.studentid having count(courseid)>=1 order by sum_grade desc");rs=ps.executeQuery();int rank=0;while(rs.next()){//rowData可以存放多行rank++;Vector<Object> hang=new Vector<Object>();hang.add(rank);hang.add(rs.getString(1));hang.add(rs.getString(2));//加入到rowDatarowData.add(hang);}} catch (Exception e) {e.printStackTrace();} finally{try {if(rs!=null){rs.close();}if(ps!=null){ps.close();}if(ct!=null){ct.close();}} catch (SQLException e) {e.printStackTrace();}}table7 = new JTable(rowData,columnNames){private static final long serialVersionUID = 3701216243676371199L;public boolean isCellEditable(int row, int column){return false;}//表格不允许被编辑};table7.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);//只允许选中一行DefaultTableCellRenderer tcr = new DefaultTableCellRenderer();// 设置table内容居中tcr.setHorizontalAlignment(JLabel.CENTER);// 这句和上句作用一样table7.setDefaultRenderer(Object.class, tcr);js.setViewportView(table7);}
}

最后一个systemUI系统将各个信息表进行连接，使其具有先后顺序：

package 教学管理系统;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import java.awt.Toolkit;
import javax.swing.JTabbedPane;
import javax.swing.JScrollPane;public class SystemUI extends JFrame{private static final long serialVersionUID = 4197017698513729527L;Teacher t = new Teacher();Course c = new Course();Student st = new Student();Score sc = new Score();SelectCourse se = new SelectCourse(); static JTabbedPane tabbedPane;static JToolBar toolBar_1;static JToolBar toolBar_2;static JToolBar toolBar_3;static JToolBar toolBar_4;static JToolBar toolBar_5;static JButton AddTeacher;static JButton UpdateTeacher;static JButton DeleteTeacher;static JButton SearchTeacher;static JButton RefreshTeacher;static JButton AddStudent;static JButton UpdateStudent;static JButton DeleteStudent;static JButton SearchStudent;static JButton RefreshStudent;static JButton AddCourse;static JButton UpdateCourse;static JButton DeleteCourse;static JButton SearchCourse;static JButton RefreshCourse;static JButton AddSelCou;static JButton DeleteSelCou;static JButton SearchSelCou;static JButton RefreshSelCou;static JButton AddScore;static JButton UpdateScore;static JButton DeleteScore;static JButton SearchScore;static JButton RefreshScore;static JButton Statistical;static JButton TotalRank;static JScrollPane scrollPane1;static JScrollPane scrollPane2;static JScrollPane scrollPane3;static JScrollPane scrollPane4;static JScrollPane scrollPane5;public SystemUI() {setIconImage(Toolkit.getDefaultToolkit().getImage(".jpg"));this.setResizable(false);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setSize(565, 500);this.setLocation(550, 0);this.setVisible(true);this.setTitle("欢迎来到教务系统");getContentPane().setLayout(new BorderLayout(0, 0));tabbedPane = new JTabbedPane(JTabbedPane.TOP);getContentPane().add(tabbedPane, BorderLayout.CENTER);JPanel TeacherInfo = new JPanel();JPanel StudentInfo = new JPanel();JPanel CourseInfo = new JPanel();JPanel ScoreInfo = new JPanel();JPanel SelectCourseInfo = new JPanel();tabbedPane.add(TeacherInfo,"教师信息");TeacherInfo.setLayout(new BorderLayout(0, 0));toolBar_1 = new JToolBar();TeacherInfo.add(toolBar_1, BorderLayout.NORTH);AddTeacher = new JButton("添加教师信息");AddTeacher.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {t.addTeacher();}});toolBar_1.add(AddTeacher);UpdateTeacher = new JButton("修改教师信息");UpdateTeacher.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {t.updateTeacher();}});toolBar_1.add(UpdateTeacher);DeleteTeacher = new JButton("删除教师信息");DeleteTeacher.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {t.deleteTeacher();}});toolBar_1.add(DeleteTeacher);SearchTeacher = new JButton("搜索教师信息");SearchTeacher.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {t.searchTeacher();}});toolBar_1.add(SearchTeacher);RefreshTeacher = new JButton("刷新");RefreshTeacher.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {t.refreshTeacher();}});toolBar_1.add(RefreshTeacher);scrollPane1 = new JScrollPane();TeacherInfo.add(scrollPane1, BorderLayout.CENTER);scrollPane1.setViewportView(Teacher.table1);      tabbedPane.add(StudentInfo,"学生信息");StudentInfo.setLayout(new BorderLayout(0, 0));toolBar_2 = new JToolBar();StudentInfo.add(toolBar_2, BorderLayout.NORTH);AddStudent = new JButton("添加学生信息");AddStudent.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {st.addStudent();}});toolBar_2.add(AddStudent);UpdateStudent = new JButton("修改学生信息");UpdateStudent.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {st.updateStudent();}});toolBar_2.add(UpdateStudent);DeleteStudent = new JButton("删除学生信息");DeleteStudent.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {st.deleteStudent();}});toolBar_2.add(DeleteStudent);SearchStudent = new JButton("搜索学生信息");SearchStudent.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {st.searchStudent();}});toolBar_2.add(SearchStudent);RefreshStudent = new JButton("刷新");RefreshStudent.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {st.refreshStudent();}});toolBar_2.add(RefreshStudent);scrollPane2 = new JScrollPane();StudentInfo.add(scrollPane2, BorderLayout.CENTER);scrollPane2.setViewportView(Student.table2);tabbedPane.add(CourseInfo,"课程信息");CourseInfo.setLayout(new BorderLayout(0, 0));toolBar_3 = new JToolBar();CourseInfo.add(toolBar_3, BorderLayout.NORTH);AddCourse = new JButton("添加课程信息");AddCourse.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {c.addCourse();}});toolBar_3.add(AddCourse);UpdateCourse = new JButton("修改课程信息");UpdateCourse.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {c.updateCourse();}});toolBar_3.add(UpdateCourse);DeleteCourse = new JButton("删除课程信息");DeleteCourse.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {c.deleteCourse();}});toolBar_3.add(DeleteCourse);SearchCourse = new JButton("搜索课程信息");SearchCourse.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {c.searchCourse();}});toolBar_3.add(SearchCourse);RefreshCourse = new JButton("刷新");RefreshCourse.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {c.refreshCourse();}});toolBar_3.add(RefreshCourse);scrollPane3 = new JScrollPane();CourseInfo.add(scrollPane3, BorderLayout.CENTER);scrollPane3.setViewportView(Course.table3);tabbedPane.add(SelectCourseInfo,"选课管理");SelectCourseInfo.setLayout(new BorderLayout(0, 0));toolBar_5 = new JToolBar();SelectCourseInfo.add(toolBar_5, BorderLayout.NORTH);AddSelCou = new JButton("添加选课信息");AddSelCou.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {se.addSelCou();}});toolBar_5.add(AddSelCou);DeleteSelCou = new JButton("删除选课信息");DeleteSelCou.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {se.deleteSelCou();}});toolBar_5.add(DeleteSelCou);SearchSelCou = new JButton("搜索选课信息");SearchSelCou.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {se.searchSelCou();}});toolBar_5.add(SearchSelCou);RefreshSelCou = new JButton("刷新");RefreshSelCou.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {se.refreshSelCou();}});toolBar_5.add(RefreshSelCou);scrollPane5 = new JScrollPane();SelectCourseInfo.add(scrollPane5, BorderLayout.CENTER);scrollPane5.setViewportView(SelectCourse.table5);tabbedPane.add(ScoreInfo,"成绩管理");ScoreInfo.setLayout(new BorderLayout(0, 0));toolBar_4 = new JToolBar();ScoreInfo.add(toolBar_4, BorderLayout.NORTH);AddScore = new JButton("添加成绩信息");AddScore.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.addScore();}});toolBar_4.add(AddScore);UpdateScore = new JButton("修改成绩信息");UpdateScore.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.updateScore();}});toolBar_4.add(UpdateScore);DeleteScore = new JButton("删除成绩信息");DeleteScore.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.deleteScore();}});toolBar_4.add(DeleteScore);SearchScore = new JButton("搜索成绩信息");SearchScore.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.searchScore();};});toolBar_4.add(SearchScore);Statistical = new JButton("统计分析");Statistical.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {//sc.statistical();}});toolBar_4.add(SearchScore);TotalRank = new JButton("总分排名");TotalRank.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.totalrank();}});toolBar_4.add(TotalRank);RefreshScore = new JButton("刷新");RefreshScore.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.refreshScore();}});toolBar_4.add(RefreshScore);scrollPane4 = new JScrollPane();ScoreInfo.add(scrollPane4, BorderLayout.CENTER);scrollPane4.setViewportView(Score.table4);}public static void main(String[] args) {EventQueue.invokeLater(new Runnable() {public void run() {try {SystemUI frame = new SystemUI();frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}});}public static void clickable() {tabbedPane.setEnabled(true);AddTeacher.setEnabled(true);DeleteTeacher.setEnabled(true);RefreshTeacher.setEnabled(true);SearchTeacher.setEnabled(true);UpdateTeacher.setEnabled(true);AddStudent.setEnabled(true);DeleteStudent.setEnabled(true);RefreshStudent.setEnabled(true);SearchStudent.setEnabled(true);UpdateStudent.setEnabled(true);AddCourse.setEnabled(true);DeleteCourse.setEnabled(true);RefreshCourse.setEnabled(true);SearchCourse.setEnabled(true);UpdateCourse.setEnabled(true);AddScore.setEnabled(true);DeleteScore.setEnabled(true);RefreshScore.setEnabled(true);SearchScore.setEnabled(true);UpdateScore.setEnabled(true);Statistical.setEnabled(true);AddSelCou.setEnabled(true);DeleteSelCou.setEnabled(true);SearchSelCou.setEnabled(true);RefreshSelCou.setEnabled(true);TotalRank.setEnabled(true);}public static void unclickable() {tabbedPane.setEnabled(false);AddTeacher.setEnabled(false);DeleteTeacher.setEnabled(false);RefreshTeacher.setEnabled(false);SearchTeacher.setEnabled(false);UpdateTeacher.setEnabled(false);AddStudent.setEnabled(false);DeleteStudent.setEnabled(false);RefreshStudent.setEnabled(false);SearchStudent.setEnabled(false);UpdateStudent.setEnabled(false);AddCourse.setEnabled(false);DeleteCourse.setEnabled(false);RefreshCourse.setEnabled(false);SearchCourse.setEnabled(false);UpdateCourse.setEnabled(false);AddScore.setEnabled(false);DeleteScore.setEnabled(false);RefreshScore.setEnabled(false);SearchScore.setEnabled(false);UpdateScore.setEnabled(false);Statistical.setEnabled(false);AddSelCou.setEnabled(false);DeleteSelCou.setEnabled(false);SearchSelCou.setEnabled(false);RefreshSelCou.setEnabled(false);TotalRank.setEnabled(false);}
}

最后效果图：
心得与体验：
1：权限还有待完善，此系统只针对管理人员对数据进行添加，修改，删除和查找操作，对于学生或者教师没有设置权限进行数据处理；学生用户只能看到与学生有关的信息而不能更改教师信息，老师用户也不可随意更改学生信息。
以下是对课设中遇到的错误的分析：
2：不同版本的连接与驱动问题：我所用到的版本是MySQL5.5，进行驱动时使用语句
Class.forName(“com.mysql.jdbc.Driver”);
如果MySQL版本超过了6.0，考虑用以下语句进行驱动 Class.forName(“com.mysql.cj.jdbc.Driver”);
连接时采用语句以下语句可能会造成连接失败的问题： ct=DriverManager.getConnection(“jdbc:mysql://localhost:3306 /jiaoxueguan lixit”,“zhangsan”,“12345678”);
将其改为： ct=DriverManager.getConnection(“jdbc:mysql://localhost:3306 /jiaoxueguanlixit?user=”+userMySql+"&password="+passwordMySql+"&useUnicode=true&characterEncoding=gbk&useSSL=false&serverTimezone=GMT");
3：中文乱码问题：MySQL出现的中文乱码问题以及eclipse出现的中文乱码问题；在MySQL中使用insert语句进行插入，并用select语句进行查询，发现中文插入后查询时显示？？或者乱码文字，解决方法如下：
在MySQL页面插入以下语句来更改MySQL的编码格式：
Alter table +表名+convert to character set utf8mb4;
在eclipse语句中将连接语句中加入后缀characterEncoding=UTF-8将 eclipse编码格式转化为utf8。
4：MySQL建立的数据表太多，从而造成数据冗杂，不易分析清楚，利用了Navicat Premium软件，直接观察到MySQL的后台数据，提高效率。
5：界面与界面的连接问题：利用java语言创造的GUI图形界面，连接起来是一个问题，我单独创造了一个类SystemUI，利用toolBar_4.add(方法名);方法将各个界面或者各个按钮连接起来，如
toolBar_4.add(AddScore);
UpdateScore = new JButton(“修改成绩信息”);
UpdateScore.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sc.updateScore();
}
});
toolBar_4.add(UpdateScore);

    DeleteScore = new JButton("删除成绩信息");DeleteScore.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {sc.deleteScore();}});

6：布局管理器，监听动作，常用组件的匹配关系问题：对于一个教学管理系统，肯定会用到很多的组件，面板和监听动作，编写语句时遇到的编译问题，组件插入面板的插入问题，窗口添加面板的添加问题，都是一个个应该细心的挑战。

结束语：这篇文章是参考一篇博客：作者祭零小白，文章名：数据库小型教务系统（成绩管理系统），不懂的可以参考原作者文章。
解决java和mysql的连接问题建议参考这篇文章：https://blog.csdn.net/m0_46315342/article/details/105738470
好啦，制作不易，喜欢的希望点一个赞，希望这篇文章能有帮助。

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