介绍

该程序是链接mysql数据库的，然后我们是使用了阿里云的云服务器配置了数据库（这个是另一个同学做的），不过一下代码对于本地数据库应该也是可以实现的，然后实现了一些基本的功能比如增删查改，使用了javaswing来写页面（比较丑哈哈），学生和老师注册登录啊之类的功能。

文件结构

代码

Main.java

import Mainfunction.CheckAccount;
import Mainfunction.CheckAccount2;
import Mainfunction.InsertStudentInformation;
import Mainfunction.InsertTeacherInformation;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
class Fun  implements ActionListener{Connection connection;JFrame frame=new JFrame();JLabel lb1;//顶部需要的组件Button bt1,bt2,bt3,bt4;//定义中间所需要的组件// 中部有4个panel，选项卡窗口管理JTabbedPane pane;JPanel panel_s,panel_t;JLabel label1,label2;JLabel label3,label4;JLabel stu;//用来提示这是学生的登录界面,学生默认输入长度为11位JLabel tea;//用来提示这是老师的登录界面,老师默认输入长度为3位JTextField textField_student;//学生区域的学生输入框JPasswordField Password_student;//密码输入框JTextField textField_teacher;//老师区域输入框JPasswordField Password_teacher;//老师区域密码输入框//底部所需要的组件JPanel jPanel1;JButton jButton;//3学生注册界面相关控件JPanel stu_register;JLabel S_register_lb1,S_register_lb2;JTextField S_register;JPasswordField S_pass;JLabel Student;//4老师注册界面相关控件JPanel tea_register;JLabel T_register_lb1,T_register_lb2;JTextField T_register;JPasswordField T_pass;JLabel Teacher;@Overridepublic void actionPerformed(ActionEvent e) {}public Fun(){//数据库连接jdbcConnection jdbc=new jdbcConnection();connection=jdbc.giveConnection();//处理底部lb1=new JLabel(new ImageIcon("src/mao.png"));jPanel1=new JPanel();//jButton=new JButton("确定");//jPanel1.add(jButton);//将button组件加进去//后面舍弃了这种做法直接四个界面加入button应对不同的情况//处理中部panel_s=new JPanel(new GridLayout(3,3));label1=new JLabel("学生账号",JLabel.CENTER);label2=new JLabel("学生密码",JLabel.CENTER);textField_student=new JTextField();Password_student=new JPasswordField();stu=new JLabel("这里是学生登录界面",JLabel.CENTER);bt1=new Button("login");//按控件顺序加入到每个板面panel_s.add(label1);panel_s.add(textField_student);panel_s.add(label2);panel_s.add(Password_student);panel_s.add(stu);panel_s.add(bt1);//老师panel_t=new JPanel(new GridLayout(3,3));label3=new JLabel("老师账号",JLabel.CENTER);label4=new JLabel("老师密码",JLabel.CENTER);textField_teacher=new JTextField();Password_teacher=new JPasswordField();bt2=new Button("login");tea=new JLabel("这里是老师登录界面",JLabel.CENTER);panel_t.add(label3);panel_t.add(textField_teacher);panel_t.add(label4);panel_t.add(Password_teacher);panel_t.add(tea);panel_t.add(bt2);//学生注册stu_register=new JPanel(new GridLayout(3,3));S_register_lb1=new JLabel("注册学生账号",JLabel.CENTER);S_register_lb2=new JLabel("注册学生密码",JLabel.CENTER);S_register=new JTextField();S_pass=new JPasswordField();Student=new JLabel("这里是学生注册",JLabel.CENTER);bt3=new Button("register");Student.setForeground(Color.RED);stu_register.add(S_register_lb1);stu_register.add(S_register);stu_register.add(S_register_lb2);stu_register.add(S_pass);stu_register.add(Student);stu_register.add(bt3);//老师注册tea_register=new JPanel(new GridLayout(3,3));T_register_lb1=new JLabel("注册老师账号",JLabel.CENTER);T_register_lb2=new JLabel("注册老师密码",JLabel.CENTER);T_register=new JTextField();T_pass=new JPasswordField();Teacher=new JLabel("这里是进行老师注册",JLabel.CENTER);bt4=new Button("register");Teacher.setForeground(Color.BLUE);tea_register.add(T_register_lb1);tea_register.add(T_register);tea_register.add(T_register_lb2);tea_register.add(T_pass);tea_register.add(Teacher);tea_register.add(bt4);//创建选项卡窗口//加入页面pane=new JTabbedPane();pane.add("学生登录",panel_s);pane.add("老师登录",panel_t);pane.add("学生注册",stu_register);pane.add("老师注册",tea_register);frame.setSize(550,340);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setLocationRelativeTo(null);frame.setVisible(true);frame.add(lb1,"North");frame.add(jPanel1,"South");frame.add(pane,"Center");bt1.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String account= textField_student.getText();String password=new String(Password_student.getPassword());CheckAccount checkAccount=new CheckAccount(frame,connection,account,password);if(checkAccount.check()){UserView view=  new UserView(1,connection,account);frame.dispose();// view.number=1;}else{JOptionPane.showMessageDialog(frame,"登录错误","Error",JOptionPane.INFORMATION_MESSAGE);}}});bt2.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String account= textField_teacher.getText();String password=new String(Password_teacher.getPassword());CheckAccount2 checkAccount=new CheckAccount2(frame,connection,account,password);if(checkAccount.check()){UserView view=  new UserView(2,connection,account);frame.dispose();// view.number=1;}else{JOptionPane.showMessageDialog(frame,"登录错误","Error",JOptionPane.INFORMATION_MESSAGE);}}});bt3.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {try{//读取账号和密码String account= S_register.getText();String password=new String(S_pass.getPassword());//进行数字的判断int number=Integer.parseInt(account);//进行数字长度的判断if(account.length()==6){InsertStudentInformation s=new InsertStudentInformation(frame,connection,account,password);if(s.giveBool()){JOptionPane.showMessageDialog(frame,"注册成功","Yes",JOptionPane.INFORMATION_MESSAGE);}}else{JOptionPane.showMessageDialog(frame,"账号不合法，注意为6位数字","Error",JOptionPane.INFORMATION_MESSAGE);}}catch (Exception exception){JOptionPane.showMessageDialog(frame,"账号不合法，注意为三位数字","Error",JOptionPane.INFORMATION_MESSAGE);}//将学生的数据存入数据库}});bt4.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {try{//读取账号和密码String account= T_register.getText();String password=new String(T_pass.getPassword());//进行数字的判断int number=Integer.parseInt(account);//进行数字长度的判断if(account.length()==3){InsertTeacherInformation t=new InsertTeacherInformation(frame,connection,account,password);//返回bool值检查是否已存在已有账号if(t.giveBool()){JOptionPane.showMessageDialog(frame,"注册成功","Yes",JOptionPane.INFORMATION_MESSAGE);}}else{JOptionPane.showMessageDialog(frame,"账号不合法，注意为3位数字","Error",JOptionPane.INFORMATION_MESSAGE);}}catch (Exception exception){JOptionPane.showMessageDialog(frame,"账号不合法，注意为三位数字","Error",JOptionPane.INFORMATION_MESSAGE);}//老师的数据存入数据库}});}
}
public class Main {public static void main(String[] args) {Fun Fun=new Fun();}
}

UserView.java

import java.awt.*;
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 check.*;
import check.Teacher_InsertScore;
import view.*;import javax.swing.*;public class UserView {//用户idprivate String id;//数据库private Connection connection;private JFrame userView = new JFrame("界面");private JPanel panel = new JPanel(new FlowLayout());public int number;//添加功能选择private JButton studentInformation = new JButton("学生信息");private JButton Student_Course = new JButton("学生选课");private JButton Teacher_Information = new JButton("老师信息");private JButton Teacher_CheckScore = new JButton("查看分数");private JButton Teacher_InsertScore = new JButton("登记分数");private JButton function6 = new JButton("数据库备份");//先声明功能的选择，到以后写好包之后即可删除private JFrame fuction5_View;private JFrame fuction6_View;public UserView(int number, Connection connection, String id) {this.connection = connection;this.number = number;this.id = id;init();}public void init() {if (this.number == 1) {studentInformation.setFont(new Font("", Font.BOLD, 15));panel.add(studentInformation);Student_Course.setFont(new Font("", Font.BOLD, 15));panel.add(Student_Course);} else {Teacher_Information.setFont(new Font("", Font.BOLD, 15));panel.add(Teacher_Information);Teacher_InsertScore.setFont(new Font("", Font.BOLD, 15));panel.add(Teacher_InsertScore);Teacher_CheckScore.setFont(new Font("", Font.BOLD, 15));panel.add(Teacher_CheckScore);function6.setFont(new Font("", Font.BOLD, 15));panel.add(function6);}//添加佛大图片JLabel Fosu = new JLabel(new ImageIcon("src/img.png"));panel.add(Fosu);Fosu.setBounds(0, 150, 700, 200);//添加文字JLabel showName = new JLabel("成绩管理系统");showName.setFont(new Font("", Font.BOLD, 22));panel.add(showName);userView.add(panel);userView.setSize(500, 500);userView.setLocationRelativeTo(null);userView.setVisible(true);userView.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/** 给按钮添加事件监听器*///学生信息页面studentInformation.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {userView.setVisible(false);Student_Information student_information = new Student_Information(connection, id, userView);student_information.studentView.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {userView.setVisible(true);userView.setLocationRelativeTo(null);super.windowClosing(e);}});}});//学生选课页面Student_Course.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {//这里为功能输入，后期直接写好包之后导入即可userView.setVisible(false);Student_Course course1 = new Student_Course(connection, id);course1.course.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {userView.setVisible(true);userView.setLocationRelativeTo(null);super.windowClosing(e);}});}});//老师信息页面Teacher_Information.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {userView.setVisible(false);Teacher_Information course1 = new Teacher_Information(connection, id, userView);course1.teacherView.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {userView.setVisible(true);userView.setLocationRelativeTo(null);super.windowClosing(e);}});}});//登记分数。Teacher_InsertScore.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {userView.setVisible(false);Teacher_InsertScore teacher_insertScore=new Teacher_InsertScore(id);teacher_insertScore.jFrame.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {userView.setVisible(true);userView.setLocationRelativeTo(null);super.windowClosing(e);}});}});//检查分数Teacher_CheckScore.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {userView.setVisible(false);Teacher_CheckScore teacher_checkScore = new Teacher_CheckScore(connection, id);teacher_checkScore.jf.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {userView.setVisible(true);userView.setLocationRelativeTo(null);super.windowClosing(e);}});}});//功能六页面function6.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {//这里为功能输入，后期直接写好包之后导入即可
//                fuction2_View = Singleton2.getInstance(); 单例模式fuction6_View = new JFrame();fuction6_View.setTitle("第二个窗口");fuction6_View.setSize(500, 500);fuction6_View.setLocationRelativeTo(null);userView.setVisible(false);fuction6_View.setVisible(true);fuction6_View.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {userView.setVisible(true);super.windowClosing(e);}});}});}
}

jdbcConnection

import java.sql.*;
public class jdbcConnection {Connection connection;public jdbcConnection() {Connection conn = null;try {try {DriverManager.registerDriver(new com.mysql.cj.jdbc.Driver());} catch (SQLException e) {e.printStackTrace();}String url = "jdbc:mysql://XXXXX";//这里为自己的数据库的链接String user = "XXXX";   //这里的信息是需要更改的账号String password = "XXXX";//这里的信息是需要更改的密码conn = DriverManager.getConnection(url, user, password);System.out.println("数据库连接对象" + conn);connection= conn;} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public Connection giveConnection(){return connection;}
}

check包

DBexecute

package check;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DBexecute {Connection connection;private PreparedStatement pstm;private ResultSet rs;public Connection getConnection() throws Exception {try {String url = "jdbc:mysql://120.25.152.50:3306/database";String user = "root";   //这里的信息是需要更改的String password = "zqy939597A";connection = DriverManager.getConnection(url, user, password);System.out.println("数据库连接对象" + connection);return connection;} catch (Exception e) {throw new SQLException("驱动错误或连接失败！");}}//查询操作public ResultSet executeQurey(String sql,String a) {try {//得到preparaStatement语句pstm = connection.prepareStatement(sql);if(a!=null){pstm.setString(1,a);}//执行sql语句rs = pstm.executeQuery();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}//返回查询结果集return rs;}//插入、删除操作public int executeUpdate(String sql, String[] data,String course) {int count = 0;try {pstm = connection.prepareStatement(sql);if (data != null) {for (int i = 0; i < data.length; i++) {pstm.setString(i + 1, data[i]);}count = pstm.executeUpdate();String sql1 = "update score set course=? where id=?";pstm = connection.prepareStatement(sql1);System.out.println("!!!"+course);System.out.println("!!!"+data[0]);pstm.setString(1,course);pstm.setString(2,data[0]);pstm.executeUpdate();}} catch (Exception e) {e.printStackTrace();}//返回修改成功的行数return count;}public int executeDelete(String sql, String[] data) {int count = 0;try {pstm = connection.prepareStatement(sql);if (data != null) {for (int i = 0; i < data.length; i++) {pstm.setString(i + 1, data[i]);}count = pstm.executeUpdate();}} catch (Exception e) {e.printStackTrace();}//返回修改成功的行数return count;}public void closeAll() {// 如果rs不空，关闭rsif (rs != null) {try {rs.close();} catch (SQLException e) {e.printStackTrace();}}// 如果pstm不空，关闭pstmif (pstm != null) {try {pstm.close();} catch (SQLException e) {e.printStackTrace();}}// 如果conn不空，关闭connif (connection != null) {try {connection.close();} catch (SQLException e) {e.printStackTrace();}}}
}

Teacher_InsertScore

package check;import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.util.Vector;import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;public class Teacher_InsertScore  {private String id;public JFrame jFrame =new JFrame();//滚动面板private JScrollPane sptable;//表格private JTable table;//放置按钮的面板private JPanel panel;//设置按钮private JButton btsave, btdelete, btadd, btflush;//设置默认表格格式private DefaultTableModel model;private String course;Connection connection;public Teacher_InsertScore(String id) {this.id=id;returnCourse();jFrame.setTitle(course+"课程成绩管理页面");//设置表格model = new DefaultTableModel();table = new JTable(model);table.setForeground(Color.BLACK);                   // 字体颜色table.setFont(new Font(null, Font.PLAIN, 14));      // 字体样式table.setSelectionForeground(Color.DARK_GRAY);      // 选中后字体颜色table.setSelectionBackground(Color.LIGHT_GRAY);     // 选中后字体背景table.setGridColor(Color.GRAY);table.getTableHeader().setFont(new Font("楷体", Font.BOLD, 14));  // 设置表头名称字体样式table.getTableHeader().setForeground(Color.RED);                // 设置表头名称字体颜色table.getTableHeader().setResizingAllowed(false);               // 设置不允许手动改变列宽table.getTableHeader().setReorderingAllowed(false);             // 设置不允许拖动重新排序各列//将表格放入滚动面板中sptable = new JScrollPane(table);//将滚动面板放入主面板中部jFrame.add(sptable, BorderLayout.CENTER);btsave = new JButton("保存");btadd = new JButton("添加");btdelete = new JButton("删除");btflush = new JButton("刷新");panel = new JPanel();panel.add(btadd);panel.add(btsave);panel.add(btdelete);panel.add(btflush);btsave.setVisible(false);jFrame.add(panel, BorderLayout.SOUTH);//显示初始数据showData();//设置界面基本数据jFrame.setSize(1000, 600);jFrame.setLocationRelativeTo(null);jFrame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);jFrame.setVisible(true);//添加监听器，因为每个实现的功能不同，所以这里使用匿名内部类来实现btadd.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {addData();}});btsave.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubsaveDate();}});btdelete.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubdeleteDate();}});btflush.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubshowData();}});}void showData() {// TODO Auto-generated method stubtry {returnCourse();String sql = "select id,name,score from score where course= ? ";DBexecute db = new DBexecute();connection=db.getConnection();//连接数据库db.getConnection();//获取返回集ResultSet rs = db.executeQurey(sql,course);//获取列名System.out.println(id);System.out.println(course);ResultSetMetaData rsmt = rs.getMetaData();//获取列数int count = rsmt.getColumnCount();//创建一个Vector集合存放列名titleVector<String> title = new Vector<>();//存放列名for (int i = 1; i <= count; i++) {title.add(rsmt.getColumnLabel(i));}//存放集合（行数据）的集合Vector<Vector<String>> data = new Vector();//判断表中有无数据int rowCount = 0;//将数据放入data中while (rs.next()) {rowCount++;//设置一个集合存放行数据，在放入data中Vector<String> rowData = new Vector<>();for (int i = 1; i <= count; i++) {rowData.add(rs.getString(i));}data.add(rowData);}if (rowCount == 0) {//若行为0即数据库表中没有数据，便将title列名放入table即可model.setDataVector(null, title);} else {//若有数据，则将调用setDataVector将title插入data的第0列model.setDataVector(data, title);}} catch (Exception e) {e.printStackTrace();JOptionPane.showMessageDialog(jFrame, "系统错误！请仔细检查！");}}private void addData() {// TODO Auto-generated method stubint rowCount = model.getRowCount();int rowCount1 = table.getRowCount();//最好使用Object[]model.insertRow(rowCount, new String[]{"0", "0","0"});btadd.setVisible(false);btsave.setVisible(true);}private void saveDate() {// TODO Auto-generated method stubint rowCount = table.getRowCount() - 1;//获取自己填写的数据String id = table.getValueAt(rowCount, 0).toString();String name = table.getValueAt(rowCount, 1).toString();String score = table.getValueAt(rowCount, 2).toString();DBexecute db = new DBexecute();try {db.getConnection();String sql = "insert score values(?,?,?,?)";int count = db.executeUpdate(sql, new String[]{id,name,null,score},course);showData();btadd.setVisible(true);btsave.setVisible(false);if (count == 1) {JOptionPane.showMessageDialog(jFrame, "插入数据成功！");} else {JOptionPane.showMessageDialog(jFrame, "插入数据失败！");}} catch (Exception e) {e.printStackTrace();} finally {db.closeAll();}}private void deleteDate() {// TODO Auto-generated method stubint index[] = table.getSelectedRows();if (index == null) {JOptionPane.showMessageDialog(jFrame, "请选择需要删除的数据！", "删除", JOptionPane.PLAIN_MESSAGE);} else {try {int k = JOptionPane.showConfirmDialog(jFrame, "是否要删除这条记录？", "删除", JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);if (k == JOptionPane.YES_OPTION) {DBexecute db = new DBexecute();try {db.getConnection();String sql = "delete from score where id=?";String name = table.getValueAt(index[0], 0).toString();int count = db.executeDelete(sql, new String[]{name});showData();if (count == 1) {JOptionPane.showMessageDialog(jFrame, "删除数据成功！", "成功", JOptionPane.INFORMATION_MESSAGE);} else {JOptionPane.showMessageDialog(jFrame, "删除数据失败！", "失败", JOptionPane.WARNING_MESSAGE);}} catch (Exception e) {e.printStackTrace();} finally {db.closeAll();}}} catch (Exception ee) {JOptionPane.showMessageDialog(jFrame, "抱歉!删除数据失败!【系统异常！】", "失败:", 0);}}}public void returnCourse() {try {DBexecute db = new DBexecute();db.getConnection();String sql="select course from 老师基本信息表 where teacherid=?";ResultSet rs=db.executeQurey(sql,id);if(rs.next()){this.course=rs.getString(1);}} catch (Exception e) {}}
}

Mainfunction包

CheckAccount

package Mainfunction;import javax.swing.*;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;public class CheckAccount {private Connection connection;private String  account;private JFrame frame;private String  password;PreparedStatement stmt=null;ResultSet result=null;public CheckAccount(JFrame frame,Connection connection, String account, String password){this.frame=frame;this.account=account;this.password=password;this.connection=connection;}public boolean check(){try {String sql = "select * from studentregister where username= ? and password= ? ";stmt = connection.prepareStatement(sql);stmt.setString(1, account);stmt.setString(2, password);result = stmt.executeQuery();if (result.next()) {JOptionPane.showMessageDialog(frame,"登录成功","Yes",JOptionPane.INFORMATION_MESSAGE);return true;}else{return false;}}catch (Exception e){return  false;}}
}

CheckAccount1

package Mainfunction;import javax.swing.*;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;public class CheckAccount2 {private Connection connection;private String account;private JFrame frame;private String password;PreparedStatement stmt = null;ResultSet result = null;public CheckAccount2(JFrame frame, Connection connection, String account, String password) {this.frame = frame;this.account = account;this.password = password;this.connection = connection;}public boolean check() {try {String sql = "select * from teacherregister where username= ? and password= ? ";stmt = connection.prepareStatement(sql);stmt.setString(1, account);stmt.setString(2, password);result = stmt.executeQuery();if (result.next()) {JOptionPane.showMessageDialog(frame,"登录成功","Yes",JOptionPane.INFORMATION_MESSAGE);return true;} else {return false;}} catch (Exception e) {return false;}}
}

InsertStudentInformation

package Mainfunction;import javax.swing.*;
import java.sql.*;public class InsertStudentInformation {private String account;private String password;private Connection connection;private JFrame frame;PreparedStatement stmt=null;ResultSet result=null;public InsertStudentInformation(JFrame frame,Connection connection,String  account,String password){this.account=account;this.password=password;this.connection=connection;this.frame=frame;}public boolean giveBool(){try {String sql = "select * from studentregister where username= ?";stmt = connection.prepareStatement(sql);stmt.setString(1, account);result = stmt.executeQuery();//查询到已有账号就是已经存在，则返回falseif (result.next()) {JOptionPane.showMessageDialog(frame,"注册错误,已存在此账号","No",JOptionPane.INFORMATION_MESSAGE);return false;}//插入注册的账号和密码String sql1 = "insert into studentregister value (?,?)";String sql2 = "insert into 学生基本信息表 value (?,?,?,?)";PreparedStatement pstmt = connection.prepareStatement(sql1);PreparedStatement pstmt2 = connection.prepareStatement(sql2);pstmt.setString(1,account);pstmt.setString(2,password);pstmt2.setString(1,account);pstmt2.setString(2,"null");pstmt2.setString(3,"null");pstmt2.setString(4,"null");int count1 = pstmt.executeUpdate();int count2 = pstmt2.executeUpdate();if(count1 ==1&&count2==1){return true;}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();return false;}return true;}
}

InsertTeacherInformation

``
package Mainfunction;

import javax.swing.;
import java.sql.;

public class InsertTeacherInformation {
private String account;
private String password;
private Connection connection;
private JFrame frame;
PreparedStatement stmt=null;
ResultSet result=null;
public InsertTeacherInformation(JFrame frame,Connection connection,String account,String password){
this.account=account;
this.password=password;
this.connection=connection;
this.frame=frame;

}
public boolean giveBool(){try {String sql = "select * from teacherregister where username= ?";stmt = connection.prepareStatement(sql);stmt.setString(1, account);result = stmt.executeQuery();//查询到已有账号就是已经存在，则返回falseif (result.next()) {JOptionPane.showMessageDialog(frame,"注册错误,已存在此账号","No",JOptionPane.INFORMATION_MESSAGE);return false;}//插入注册的账号和密码String sql1 = "insert into teacherregister value (?,?)";String sql2 = "insert into 老师基本信息表 value (?,?,?,?)";PreparedStatement pstmt = connection.prepareStatement(sql1);PreparedStatement pstmt2 = connection.prepareStatement(sql2);pstmt.setString(1,account);pstmt.setString(2,password);pstmt2.setString(1,account);pstmt2.setString(2,"null");pstmt2.setString(3,"null");pstmt2.setString(4,"null");int count1 = pstmt.executeUpdate();int count2 = pstmt2.executeUpdate();if(count1 ==1&&count2==1){return true;}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();return false;}return true;
}

view包

Student_Coures

package view;import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.PreparedStatement;public class Student_Course extends Component implements ActionListener {ActionEvent event;private Connection connection;private String id;private int selectclass;public JFrame course=new JFrame();private JPanel panel = new JPanel(new GridLayout());public Student_Course(Connection connection,String id){this.connection=connection;this.id=id;init();}void init(){course=new JFrame();course.setTitle("学生选课查询");course.setSize(500,500);JRadioButton b1=new JRadioButton("大数据技术");b1.setFont(new Font("", Font.BOLD, 15));JRadioButton b2=new JRadioButton("算法分析与设计");b2.setFont(new Font("", Font.BOLD, 15));JRadioButton b3=new JRadioButton("Kotlin语言");b3.setFont(new Font("", Font.BOLD, 15));JRadioButton b4=new JRadioButton("汇编语言");b4.setFont(new Font("", Font.BOLD, 15));b1.setBounds(75,50,100,30);b2.setBounds(75,90,100,30);b3.setBounds(75,130,100,30);b4.setBounds(75,170,100,30);ButtonGroup bg=new ButtonGroup();JTextArea area=new JTextArea("请选择你的选课,点击选择后页面会自动退出，请注意",40,40);area.setFont(new Font("", Font.BOLD, 22));area.setEditable(false);area.setLineWrap(true);bg.add(b1);bg.add(b2);bg.add(b3);bg.add(b4);panel.add(area);panel.add(b1);panel.add(b2);panel.add(b3);panel.add(b4);course.add(panel);course.setLocationRelativeTo(null);course.setVisible(true);b1.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if(b1.isSelected()){JOptionPane.showMessageDialog(course,"你已选择大数据技术课程成功");selectclass=1;updateCourse(selectclass);course.dispatchEvent(new WindowEvent(course,WindowEvent.WINDOW_CLOSING) );}}});b2.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if(b2.isSelected()){JOptionPane.showMessageDialog(course,"你已选择算法设计与分析课程成功");selectclass=2;updateCourse(selectclass);course.dispatchEvent(new WindowEvent(course,WindowEvent.WINDOW_CLOSING) );}}});b3.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if(b3.isSelected()){JOptionPane.showMessageDialog(course,"你已选择Kotlin语言课程成功");selectclass=3;updateCourse(selectclass);course.dispatchEvent(new WindowEvent(course,WindowEvent.WINDOW_CLOSING) );}}});b4.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {if(b4.isSelected()){JOptionPane.showMessageDialog(course,"你已选择汇编语言成功");selectclass=4;updateCourse(selectclass);course.dispatchEvent(new WindowEvent(course,WindowEvent.WINDOW_CLOSING) );}}});}@Overridepublic void actionPerformed(ActionEvent e) {}public void updateCourse(int i){String a="大数据技术";String b="算法分析与设计";String c="Kotlin语言";String d="汇编语言";switch (i){case 1:try{String sql = "update  学生基本信息表 set course=? where id=?";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1,a);pstmt.setString(2,id);pstmt.executeUpdate();}catch (Exception abc){}break;case 2:try{String sql = "update  学生基本信息表 set course=? where id=?";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1,b);pstmt.setString(2,id);pstmt.executeUpdate();}catch (Exception abc){}break;case 3:try{String sql = "update  学生基本信息表 set course=? where id=?";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1,c);pstmt.setString(2,id);pstmt.executeUpdate();}catch (Exception abc){}break;case 4:try{String sql = "update  学生基本信息表 set course=? where id=?";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1,d);pstmt.setString(2,id);pstmt.executeUpdate();}catch (Exception abc){}break;}}
}
### Student_Information

package view;

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class Student_Information {
ResultSet result=null;
private String id;
private String name;
private String classes;
private String course;
private JFrame userview;
private Connection connection;
private int score;
public JFrame studentView=new JFrame();
private JPanel panel = new JPanel(new GridLayout());
JTextField textField_stu=new JTextField();
JTextField textField_class=new JTextField();
JTextField textField_account=new JTextField();
JTextField textField_course=new JTextField();
JTextField fun_course=new JTextField();
JButton submit=new JButton(“提交”);
JButton Return=new JButton(“返回”);
public Student_Information(Connection connection,String id,JFrame userview){
this.connection=connection;
this.userview=userview;
this.id=id;
init();
}
void init(){
studentView=new JFrame();
studentView.setTitle(“学生信息查询”);
studentView.setSize(500,500);
studentView.setLocationRelativeTo(null);
studentView.setVisible(true);
GridLayout layout=new GridLayout(6,2);
JPanel panel=new JPanel(layout);//设置为layout布局
JLabel L_stu=new JLabel(“名字”);
JLabel L_class=new JLabel(“班级”);
JLabel L_account=new JLabel(“账户”);
JLabel L_course=new JLabel(“已选课程”);
JLabel L_fun=new JLabel(“所选课程成绩”);
L_fun.setFont(new Font(“”,Font.BOLD,22));

    fun_course.setFont(new Font("",Font.BOLD,22));textField_account.setEditable(false);textField_course.setEditable(false);fun_course.setEditable(false);L_stu.setFont(new Font("",Font.BOLD,22));L_class.setFont(new Font("",Font.BOLD,22));L_account.setFont(new Font("",Font.BOLD,22));L_course.setFont(new Font("",Font.BOLD,22));textField_course.setFont(new Font("",Font.BOLD,22));textField_class.setFont(new Font("",Font.BOLD,22));textField_stu.setFont(new Font("",Font.BOLD,22));textField_account.setFont(new Font("",Font.BOLD,22));submit.setFont(new Font("",Font.BOLD,22));Return.setFont(new Font("",Font.BOLD,22));giveFun();panel.add(L_account);panel.add(textField_account);panel.add(L_class);panel.add(textField_class);panel.add(L_stu);panel.add(textField_stu);panel.add(L_course);panel.add(textField_course);panel.add(L_fun);panel.add(fun_course);panel.add(submit);panel.add(Return);studentView.add(panel);studentView.setVisible(true);getInformation();function();
}
public void getInformation(){try {PreparedStatement stmt=null;String sql = "select * from 学生基本信息表 where id= ?  ";System.out.println(id);stmt = connection.prepareStatement(sql);stmt.setString(1, id);result = stmt.executeQuery();if (result.next()) {textField_account.setText(result.getString(1));textField_class.setText(result.getString(3));textField_stu.setText(result.getString(2));textField_course.setText(result.getString(4));course=result.getString(4);System.out.println("!"+course);}giveFun();}catch (Exception e){}
}
public void function(){submit.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {try{id=textField_account.getText();name=textField_stu.getText();classes=textField_class.getText();course=textField_course.getText();String sql = "update  学生基本信息表 set name=?,class=? where id=?";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1,name);pstmt.setString(2,classes);pstmt.setString(3,id);giveFun();int count = pstmt.executeUpdate();if(count==1){JOptionPane.showMessageDialog(studentView,"提交成功","Yes",JOptionPane.INFORMATION_MESSAGE);}}catch(Exception exception){}}});Return.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {userview.setVisible(true);studentView.dispose();}});}
public void giveFun(){try{course=textField_course.getText();String sql = " select score from score where id=? and course=? ";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1, id);pstmt.setString(2, course);ResultSet resultset = pstmt.executeQuery();if (resultset.next())score = resultset.getInt(1);fun_course.setText( String.valueOf(score));}catch (Exception e){score=0;fun_course.setText( String.valueOf(score));}}

}

Teacher_Checkscore

package view;import com.mysql.cj.protocol.Resultset;import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.concurrent.ExecutionException;//大概每个模块的粗略模板
public class Teacher_CheckScore {private Connection connection;private String course;private String id;private int fun;public JFrame jf;ResultSet resultset = null;public Teacher_CheckScore(Connection connection, String id) {this.connection = connection;this.id = id;exe();}void exe() {try {jf = new JFrame("查看成绩");jf.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);returnCourse();JPanel panel = new JPanel(new BorderLayout());String lSqlStr = "select count(*) from score where course=?";PreparedStatement statement1 = connection.prepareStatement(lSqlStr);statement1.setString(1, course);resultset = statement1.executeQuery();int count = 0;if (resultset.next()) {count = resultset.getInt(1);System.out.println("numberOfRows= " + count);String sql = " select * from score  where course=? ";PreparedStatement statement = connection.prepareStatement(sql);statement.setString(1, course);resultset = statement.executeQuery();System.out.println(count);Object[][] rowData = new Object[count][4];System.out.println(rowData.length);int i = 0;while (resultset.next()) {rowData[i][0] = resultset.getString(1);rowData[i][1] = resultset.getString(2);rowData[i][2] = resultset.getString(3);rowData[i][3] = resultset.getString(4);i++;}// 表头（列名）Object[] columnNames = {"id", "名字", "科目", "分数"};// 表格所有行数据// 创建一个表格，指定 所有行数据 和 表头JTable table = new JTable(rowData, columnNames);// 设置表格内容颜色table.setForeground(Color.BLACK);                   // 字体颜色table.setFont(new Font(null, Font.PLAIN, 14));      // 字体样式table.setSelectionForeground(Color.DARK_GRAY);      // 选中后字体颜色table.setSelectionBackground(Color.LIGHT_GRAY);     // 选中后字体背景table.setGridColor(Color.GRAY);                     // 网格颜色// 设置表头table.getTableHeader().setFont(new Font(null, Font.BOLD, 14));  // 设置表头名称字体样式table.getTableHeader().setForeground(Color.RED);                // 设置表头名称字体颜色table.getTableHeader().setResizingAllowed(false);               // 设置不允许手动改变列宽table.getTableHeader().setReorderingAllowed(false);             // 设置不允许拖动重新排序各列table.setEnabled(false);// 设置行高table.setRowHeight(30);// 第一列列宽设置为40table.getColumnModel().getColumn(0).setPreferredWidth(40);// 设置滚动面板视口大小（超过该大小的行数据，需要拖动滚动条才能看到）table.setPreferredScrollableViewportSize(new Dimension(500, 500));// 把 表格 放到 滚动面板 中（表头将自动添加到滚动面板顶部）JScrollPane scrollPane = new JScrollPane(table);// 添加 滚动面板 到 内容面板panel.add(scrollPane);JPanel panel1=new JPanel();JButton seekScore = new JButton("查看成绩");seekScore.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {giveFun();JOptionPane.showMessageDialog(jf,"该课程的平均分为"+fun,"avg",JOptionPane.INFORMATION_MESSAGE);}});panel1.add(seekScore);// 设置 内容面板 到 窗口jf.setContentPane(panel);jf.add(panel1, BorderLayout.SOUTH);jf.pack();jf.setLocationRelativeTo(null);jf.setVisible(true);}} catch (Exception e) {}}public void giveFun(){try{String sql = " select avg(score) from score where course=? ";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1, course);ResultSet resultset = pstmt.executeQuery();if (resultset.next())fun = resultset.getInt(1);}catch (Exception e){}}public void returnCourse() {try {String sql = " select course from 老师基本信息表  where teacherid=? ";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1, id);ResultSet resultset = pstmt.executeQuery();if (resultset.next())course = resultset.getString(1);else {JOptionPane.showMessageDialog(jf,"该老师没有选择教任何的课","No",JOptionPane.INFORMATION_MESSAGE);jf.dispose();}} catch (Exception e) {}}public void function2() {}public void function3() {}public void function4() {}}

Teacher_Information

package view;import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;public class Teacher_Information {ResultSet result = null;private String id;private String name;private String pos;private String course;private JFrame userview;private Connection connection;public JFrame teacherView = new JFrame();private JPanel panel = new JPanel(new GridLayout());JTextField textField_tea = new JTextField();JTextField textField_pos = new JTextField();JTextField textField_account = new JTextField();JButton submit = new JButton("提交");JButton Return = new JButton("返回");JComboBox<String> comboBox;int coursenumber;public Teacher_Information(Connection connection, String id, JFrame userview) {this.connection = connection;this.userview = userview;this.id = id;init();}void init() {teacherView = new JFrame();teacherView.setTitle("老师信息查询");teacherView.setSize(500, 500);teacherView.setLocationRelativeTo(null);teacherView.setVisible(true);GridLayout layout = new GridLayout(5, 2);JPanel panel = new JPanel(layout);//设置为layout布局JLabel L_tea = new JLabel("姓名");JLabel L_pos = new JLabel("职位");JLabel L_account = new JLabel("账户");JLabel L_choose = new JLabel("讲授的课程");textField_account.setEditable(false);L_tea.setFont(new Font("", Font.BOLD, 22));L_pos.setFont(new Font("", Font.BOLD, 22));L_account.setFont(new Font("", Font.BOLD, 22));L_choose.setFont(new Font("", Font.BOLD, 12));String[] listData = {"无", "大数据技术", "算法分析与设计", "Kotlin语言", "汇编语言"};comboBox = new JComboBox<String>(listData);course=returnCourse();System.out.println(course);System.out.println(coursenumber);coursenumber=returnNumber(course);comboBox.setSelectedIndex(coursenumber);comboBox.addItemListener(new ItemListener() {@Overridepublic void itemStateChanged(ItemEvent e) {String lesson = (String) comboBox.getSelectedItem();try {String sql = "update 老师基本信息表 set course=? where teacherid=?";PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1, lesson);pstmt.setString(2, id);pstmt.executeUpdate();int number=returnNumber(lesson);coursenumber=number;} catch (SQLException ex) {}}});textField_pos.setFont(new Font("", Font.BOLD, 22));textField_tea.setFont(new Font("", Font.BOLD, 22));textField_account.setFont(new Font("", Font.BOLD, 22));submit.setFont(new Font("", Font.BOLD, 22));Return.setFont(new Font("", Font.BOLD, 22));panel.add(L_account);panel.add(textField_account);panel.add(L_pos);panel.add(textField_pos);panel.add(L_tea);panel.add(textField_tea);panel.add(L_choose);panel.add(comboBox);panel.add(submit);panel.add(Return);teacherView.add(panel);teacherView.setVisible(true);getInformation();function();}public void getInformation() {try {PreparedStatement stmt = null;String sql = "select * from 老师基本信息表 where teacherid=?";stmt = connection.prepareStatement(sql);stmt.setString(1, id);result = stmt.executeQuery();System.out.println(result);if (result.next()) {textField_account.setText(result.getString(1));textField_tea.setText(result.getString(3));textField_pos.setText(result.getString(2));}} catch (Exception eee) {}}public int returnNumber(String course){if(course.equals("汇编语言"))return 4;else if(course.equals("大数据技术"))return 1;else if(course.equals("算法分析与设计"))return 2;else if(course.equals("Kotlin语言"))return 3;elsereturn 0;}public String returnCourse(){try{String sql = "select course from 老师基本信息表 where teacherid = ?";System.out.println("1");PreparedStatement stmt1= connection.prepareStatement(sql);System.out.println("1");stmt1.setString(1, id);System.out.println(id);ResultSet resultSet= stmt1.executeQuery();if(resultSet.next()){return resultSet.getString(1);}return "无";}catch (Exception e){return "无";}}public void function() {submit.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {try {id = textField_account.getText();name = textField_tea.getText();pos = textField_pos.getText();String sql = "update 老师基本信息表 set name=?,position=? where teacherid=?";//PreparedStatement pstmt = connection.prepareStatement(sql);pstmt.setString(1, name);pstmt.setString(2, pos);pstmt.setString(3, id);int count = pstmt.executeUpdate();if (count == 1) {JOptionPane.showMessageDialog(teacherView, "提交成功", "Yes", JOptionPane.INFORMATION_MESSAGE);}} catch (Exception ee) {}}});Return.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {userview.setVisible(true);teacherView.dispose();}});}}

下载链接–程序的完整包

链接: https://download.csdn.net/download/qq_21315871/85839034

数据库表格的设计

ER图

Score表

studentregister

teacherregister

课程与成绩关系表

老师基本信息表

学生基本信息表

系统功能和实现

由于该程序的一切都是在连接数据库的基础上实现的，所以我们组使用了阿里云的云服务器进行配置mysql服务器。（服务器的配置不是本人做就不过多介绍），同时java运行环境啊，服务器的运行环境啊，jdbc包这些就这里就不过多赘述了。

部分页面截图

详细实验报告介绍

链接: https://download.csdn.net/download/qq_21315871/85839115

心得

该程序还是比较烂的，此博文只是来记录一下自己实验周做过的事情哈哈哈。自己编写的时候也借鉴了很多资料和很多内容。

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