Java+sql server学生管理系统代码展示
我会先细致的说一下我的界面设计和功能实现以及遇到的问题,然后代码会放到每块的后面展示。
所有界面除了主界面(因为主界面较简单就用了BorderLayout),其余都用的自由布局:
setLayout(null);//自由布局,然后可所以设置组件的位置setBounds(1, 2, 3, 4);//四个参数分别为横坐标,纵坐标,所占空间的长度,所占空间的宽度
主界面:
主界面我用到了左右分屏(分屏的方式:左右是HORIZONTAL_SPLIT,上下是VERTICAL_SPLIT):
JSplitPane jSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,A,B);
//分屏的方式:左右是HORIZONTAL_SPLIT,上下是VERTICAL_SPLITjSplitPane.setDividerLocation(300);//左边占的长度jSplitPane.setDividerSize(0);//分界线的宽度 设置为0 即不显示出分界线
添加图片:
ImageIcon im =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\d.png");//图片地址
JLabel a=new JLabel(im);//添加到JLabel里,然后就可以放到你想放的地方
package homework;import java.awt.BorderLayout;//省略咯!!public class 界面 extends JFrame{ /*** */private static final long serialVersionUID = 1L;public 界面() { setTitle("登录");setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setSize(600,470);this.setLocation(300,120);JPanel A=new JPanel();A.setBackground(Color.WHITE);ImageIcon im =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\d.png");JLabel a=new JLabel(im);A.add(a);JPanel B=new JPanel(new BorderLayout());B.setBackground(Color.PINK);JSplitPane jSplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,A,B);//分屏的方式:左右HORIZONTAL_SPLIT,上下VERTICAL_SPLITjSplitPane.setDividerLocation(300);//左边占的长度this.add(jSplitPane);jSplitPane.setDividerSize(0);//分界线的宽度 设置为0 即不显示出分界线A.setBorder(BorderFactory.createLineBorder(Color.BLUE));B.setBorder(BorderFactory.createLineBorder(Color.BLUE));JLabel w=new JLabel(" 我 是 ");JButton g=new JButton("管理员");JPanel G=new JPanel(); G.setBackground(Color.PINK);G.add(g);g.setContentAreaFilled(false);JButton x=new JButton("学生");JPanel X=new JPanel();X.add(x);X.setBackground(Color.PINK);x.setContentAreaFilled(false);B.add(w,BorderLayout.NORTH);w.setHorizontalAlignment(SwingConstants.CENTER);//居中w.setPreferredSize(new Dimension(0,150));//宽度150w.setFont(new Font("楷体",Font.PLAIN,25));//设置字体的字体,样子,大小 B.add(X,BorderLayout.CENTER);B.add(G,BorderLayout.SOUTH);G.setPreferredSize(new Dimension(0,200));//宽度200x.addActionListener(new ActionListener() //监听学生按钮{public void actionPerformed(ActionEvent e){new XX(); }});g.addActionListener(new ActionListener() //监听管理员按钮{public void actionPerformed(ActionEvent e){new GG(); }});}public static void main(String[] args){ new 界面().setVisible(true);}}
学生登陆界面和管理员登陆界面:
两个图标在这里可自取:
按钮透明化和背景颜色:
setContentAreaFilled(false);setBackground(Color.PINK);
验证码功能(区分大小写,点击可更换)单独写了个类:
public class ValidCode extends JComponent implements MouseListener { /*** */private static final long serialVersionUID = 1L;private String code; private int width, height = 40; private int codeLength = 4; private Random random = new Random(); public ValidCode() { width = this.codeLength * 16 + (this.codeLength - 1) * 10; setPreferredSize(new Dimension(width, height)); setSize(width, height); this.addMouseListener(this); setToolTipText("点击可以更换验证码"); } public int getCodeLength() { return codeLength; } //设置验证码文字的长度 public void setCodeLength(int codeLength) { if(codeLength < 4) { this.codeLength = 4; } else { this.codeLength = codeLength; } } public String getCode() { return code; } // 产生随机的颜色 public Color getRandColor(int min, int max) { if (min > 255) min = 255; if (max > 255) max = 255; int red = random.nextInt(max - min) + min; int green = random.nextInt(max - min) + min; int blue = random.nextInt(max - min) + min; return new Color(red, green, blue); } // 设置验证码具体的字母是什么 protected String generateCode() { char[] codes = new char[this.codeLength]; for (int i = 0, len = codes.length; i < len; i++) { if (random.nextBoolean()) { codes[i] = (char) (random.nextInt(26) + 65); } else { codes[i] = (char) (random.nextInt(26) + 97); } } this.code = new String(codes); return this.code; } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); if(this.code == null || this.code.length() != this.codeLength) { this.code = generateCode(); } width = this.codeLength * 16 + (this.codeLength - 1) * 10; super.setSize(width, height); super.setPreferredSize(new Dimension(width, height)); Font mFont = new Font("Arial", Font.BOLD | Font.ITALIC, 25); g.setFont(mFont); //绘制出验证码的背景的矩形轮廓 Graphics2D g2d = (Graphics2D) g; g2d.setColor(getRandColor(200, 250)); g2d.fillRect(0, 0, width, height); g2d.setColor(getRandColor(180, 200)); g2d.drawRect(0, 0, width - 1, height - 1); //绘制出验证码背景的线 int i = 0, len = 150; for (; i < len; i++) { int x = random.nextInt(width - 1); int y = random.nextInt(height - 1); int x1 = random.nextInt(width - 10) + 10; int y1 = random.nextInt(height - 4) + 4; g2d.setColor(getRandColor(180, 200)); g2d.drawLine(x, y, x1, y1); } //绘制出验证码的具体字母 i = 0; len = this.codeLength; FontMetrics fm = g2d.getFontMetrics(); int base = (height - fm.getHeight())/2 + fm.getAscent(); for(;i<len;i++) { int b = random.nextBoolean() ? 1 : -1; g2d.rotate(random.nextInt(10)*0.01*b); g2d.setColor(getRandColor(20, 130)); g2d.drawString(code.charAt(i)+"", 16 * i + 10, base); } } //下一个验证码 public void nextCode() { generateCode(); repaint(); }
因为两个界面基本一样,仅展示学生登陆界面代码:
package homework;import java.awt.Color;//省略咯!!public class XX extends JFrame {/*** */private static final long serialVersionUID = 1L;private ValidCode vcode = new ValidCode();JTextField co;static JTextField user;JPasswordField pass;JButton ok,register;public XX(){super("学生登陆"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);this.setSize(450,350); this.setLocationRelativeTo(null);setVisible(true); //将整体设为粉色背景JPanel frame=new JPanel(); frame.setBackground(Color.PINK);this.add(frame);//账号、密码所代表的图形Icon login = new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\1.png");JLabel l= new JLabel();l.setIcon(login); Icon password = new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\2.png"); JLabel p= new JLabel();p.setIcon(password);JLabel code=new JLabel("验证码");code.setFont(new Font("楷体",Font.BOLD,17));user=new JTextField();pass=new JPasswordField();co=new JTextField();ok=new JButton("登录");ok.setContentAreaFilled(false);register=new JButton("注册");register.setContentAreaFilled(false);l.setBounds(80, 50, 60, 40);p.setBounds(80, 100, 60, 40);code.setBounds(70, 150, 60, 40);user.setBounds(150, 50, 150, 30);pass.setBounds(150, 100, 150, 30);co.setBounds(150, 150, 150, 30);ok.setBounds(120, 220, 70, 30);register.setBounds(250, 220, 70, 30);vcode.setBounds(310, 145, 100, 40);frame.setLayout(null);frame.add(l);frame.add(p);frame.add(code);frame.add(user);frame.add(pass);frame.add(co);frame.add(ok);frame.add(register);frame.add(vcode);register.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){new ZC();closeThis();}});ok.addActionListener(new ActionListener() //监听登录按钮{public void actionPerformed(ActionEvent e){String jusername=user.getText();char s[]=pass.getPassword();String jpassword=new String(s);String coo=co.getText();try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//加载对应的jdbc驱动String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";//配置连接字符串String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);//创建数据库连接对象Statement st=conn.createStatement();//创建SQL语句执行对象Md5 md5 = new Md5(); String newString = md5.EncoderByMd5(jpassword);String strSQL="(Select * from dbo.PY where ID='"+jusername+"'And PAWD='"+newString+"' )";ResultSet rs=st.executeQuery(strSQL);if(coo.isEmpty()) {JOptionPane.showMessageDialog(null, "请输入验证码!","提示消息",JOptionPane.WARNING_MESSAGE);}else{if(!isValidCodeRight()) {JOptionPane.showMessageDialog(null, "验证码错误,请重新输入!","提示消息",JOptionPane.WARNING_MESSAGE);}else {if(rs.next()){ new PY(); closeThis(); } else{ JOptionPane.showMessageDialog(null,"用户名不存在或密码错误","错误!",JOptionPane.ERROR_MESSAGE);}conn.close();//关闭数据库连接 } }}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");}catch (NoSuchAlgorithmException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} catch (UnsupportedEncodingException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}});}public boolean isValidCodeRight() { if(co == null) {return false;}else if(vcode == null) {return true;}else if(vcode.getCode() .equals(co.getText())) {return true;}else return false;}public void closeThis()//关闭当前界面{this.dispose();}}
学生注册界面:
上传照片功能,这里我遇到了一个问题就是关于转义字符的问题,因为我要获取选中的图片的路径并将照片添加到JLabel里展示出来,当我们需要在字符串中使用普通的反斜杠时,就需要使用双反斜杠\\来表示;java编译器会将\\\\ 解释为 \\ ,而正则表达式里,双斜杠 \\ 代表单斜杠 \ ,这也就是为什么要用 \\\\ 表示 \ ,\\\\\\\\表示\\。
JFileChooser fileChooser = new JFileChooser("C:\\\\Users\\\\小甘同学\\\\Pictures");
//打开文件时显示的位置
fileChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);int returnVal = fileChooser.showOpenDialog(fileChooser);if(returnVal == JFileChooser.APPROVE_OPTION){ File filePath = fileChooser.getSelectedFile();//获取图片路径 System.out.println(filePath);String f=filePath.getPath();String filePath1=f.replaceAll("\\\\", "\\\\\\\\"); //将\转义为\\ImageIcon p = new ImageIcon(filePath1);photo.setIcon(p); }
然后这里用到了数据库中的表来判断是否已经存在这个人,如果存在注册失败,不存在并信息填入符合要求则成功(照片则保存照片的路径)。
我看到视频弹幕有人吐槽来着,这里我想的确实不太周到!!我本来想的是账号不能重复,但是账号名称它不一定是名字,但是我图方便就都用的名字,所以给人一种名字重名了就不可以了,我现在也觉得有点矛盾了,所以改成学号不能重复最好。
(哭唧唧,我这里放的是没改之前的)
CREATE TABLE PY
( ID CHAR(9) PRIMARY KEY,/*列级完整性约束条件,ID是主码 */PAWD CHAR(35),Sno CHAR(10),phone CHAR(12),);CREATE TABLE image( Sno CHAR(10), ima Varchar(50),);
这里的数据都是通过注册添加的,密码用了MD5加密,储存的也是加密后的:
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;import sun.misc.BASE64Encoder;public class Md5 {/**利用MD5进行加密*/public String EncoderByMd5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException{//确定计算方法MessageDigest md5=MessageDigest.getInstance("MD5");BASE64Encoder base64en = new BASE64Encoder();//加密后的字符串String newstr=base64en.encode(md5.digest(str.getBytes("utf-8")));return newstr;}}
package homework;import java.awt.Color;//省略咯!!public class ZC extends JFrame{/*** */private static final long serialVersionUID = 1L;private ValidCode vcode = new ValidCode();JTextField user,pass,idd,ph,co;JButton pho,register,exit;public ZC(){super("注册"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setSize(500,500); this.setLocationRelativeTo(null); //此窗口将置于屏幕的中央setVisible(true);JPanel frame=new JPanel(); frame.setBackground(Color.PINK);this.add(frame); JLabel username=new JLabel("账号");JLabel password=new JLabel("密码");JLabel id=new JLabel("学号");JLabel phone=new JLabel("手机号码");JLabel code=new JLabel("验证码");JLabel photo=new JLabel();user=new JTextField();pass=new JTextField();idd=new JTextField();ph=new JTextField();co=new JTextField();pho=new JButton("上传照片");register=new JButton("注 册");exit=new JButton("退 出");username.setBounds(58, 46, 60, 40);username.setFont(new Font("楷体",Font.BOLD,17));user.setBounds(100,50,120,30);password.setBounds(54,100,120,30);password.setFont(new Font("楷体",Font.BOLD,17));pass.setBounds(100,100,120,30);id.setBounds(54,150,120,30);id.setFont(new Font("楷体",Font.BOLD,17));idd.setBounds(100,150,120,30);phone.setBounds(22,200,120,30);phone.setFont(new Font("楷体",Font.BOLD,17));ph.setBounds(100,200,120,30);code.setBounds(41,250,120,30);code.setFont(new Font("楷体",Font.BOLD,17));co.setBounds(100,250,120,30);vcode.setBounds(112, 300, 100, 40);photo.setBounds(280,100,150,150);pho.setBounds(305,280,100,30);pho.setContentAreaFilled(false);register.setBounds(150,380,70,30);exit.setBounds(250,380,70,30);frame.setLayout(null);frame.add(username);frame.add(user);frame.add(password);frame.add(pass);frame.add(id);frame.add(idd);frame.add(phone);frame.add(ph);frame.add(code);frame.add(co);frame.add(photo);frame.add(pho);frame.add(register);frame.add(exit);frame.add(vcode);pho.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){JFileChooser fileChooser = new JFileChooser("C:\\\\Users\\\\小甘同学\\\\Pictures");fileChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);int returnVal = fileChooser.showOpenDialog(fileChooser);if(returnVal == JFileChooser.APPROVE_OPTION){ File filePath = fileChooser.getSelectedFile();//获取图片路径 System.out.println(filePath);String f=filePath.getPath();String filePath1=f.replaceAll("\\\\", "\\\\\\\\"); //将\转义为\\ImageIcon p = new ImageIcon(filePath1);photo.setIcon(p); }}});register.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){String user1=user.getText().trim();String pass1=pass.getText().trim();String id1=idd.getText().trim();String ph1=ph.getText().trim();String co1=co.getText();try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();String strSQL="(insert * from dbo.PY where ID='"+user1+"' )";ResultSet rs=st.executeQuery(strSQL);Md5 md5 = new Md5(); String newString = md5.EncoderByMd5(pass1);if(co1.isEmpty()) {JOptionPane.showMessageDialog(null, "请输入验证码!","提示消息",JOptionPane.WARNING_MESSAGE);}else{if(!isValidCodeRight()) {JOptionPane.showMessageDialog(null, "验证码错误,请重新输入!","提示消息",JOptionPane.WARNING_MESSAGE);}else {if(rs.next()){ JOptionPane.showMessageDialog(null,"用户名已存在","错误!", JOptionPane.ERROR_MESSAGE); }else{ String sql = "insert into dbo.PY(ID,PAWD,Sno,phone) values('"+user1+"','"+newString+"','"+id1+"','"+ph1+"') "; PreparedStatement pst = conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS); pst.executeUpdate();pst.close(); JOptionPane.showMessageDialog(null,"注册成功");}conn.close(); //关闭数据库连接 } }}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");}catch (NoSuchAlgorithmException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} catch (UnsupportedEncodingException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}}); exit.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){closeThis();new XX();}});}public boolean isValidCodeRight() { if(co == null) {return false;}else if(vcode == null) {return true;}else if(vcode.getCode() .equals(co.getText())) {return true;}else return false;}public void closeThis()//关闭当前界面{this.dispose();}}
学生登陆界面:
功能简单介绍一下:
个人信息展示自己的信息和选课信息;
选课,如果选择已经有的科目则提示,如果没有你选的科目也提示,符合条件选课成功则提示成功;
查成绩,查的如果是不存在的课程或没选过的课程则提示,查询成功则展示成绩和等级。
界面首先是菜单栏的创建,基本上用到的就是下面这些:
MenuBar bar = new MenuBar();// 创建菜单栏
Menu fileMenu = new Menu("FILE");// 创建“文件”菜单
MenuItem open = new MenuItem("OPEN");//创建FILE里面的子菜单
fileMenu.add(open);//将子菜单添加到主菜单里
fileMenu.addSeparator();// 设置菜单分隔符
bar.add(fileMenu);// 将文件添加到菜单栏上
setMenuBar(bar);// 设置菜单栏,使用这种方式设置菜单栏可以不占用布局空间
然后就是整体的布局是选项卡面板(即点击不同的选项卡展示不同的面板)我用到的是选项卡垂直排列(默认是水平排列):
JTabbedPane jtbp; //定义选项卡
JPanel jp1,jp2,jp3; //定义面板,在面板上添加组件即可jtbp=new JTabbedPane(JTabbedPane.LEFT); //创建选项卡并使选项卡垂直排列jtbp.add("个人信息",jp1); jtbp.add("选课",jp2);jtbp.add("成绩查询",jp3);jtbp.setFont(new Font("楷体",Font.PLAIN,30));//字体样子大小设置 this.add(jtbp); //添加选项卡窗格到容器
package homework;import java.awt.Color;//省略咯!!public class PY extends JFrame{/*** */ private static final long serialVersionUID = 1L;JTabbedPane jtbp; //定义选项卡JPanel jp1,jp2,jp3; //定义面板public PY() throws SQLException, ClassNotFoundException{super("学生登陆"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setSize(800,600); this.setLocationRelativeTo(null);setVisible(true);MenuBar bar = new MenuBar();// 创建菜单栏bar.setFont(new Font("楷体",Font.PLAIN,30));Menu fileMenu = new Menu("FILE");// 创建“文件”菜单fileMenu.setFont(new Font("楷体",Font.PLAIN,17));MenuItem open = new MenuItem("OPEN");MenuItem exit = new MenuItem("EXIT");Menu help = new Menu("HELP");// 创建“帮助"菜单help.setFont(new Font("楷体",Font.PLAIN,17));MenuItem print = new MenuItem("PRINT");exit.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){new XX();closeThis(); }});fileMenu.add(print); fileMenu.add(open);fileMenu.addSeparator();// 设置菜单分隔符fileMenu.add(exit);bar.add(fileMenu);// 将文件添加到菜单栏上 bar.add(help);// 将文件添加到菜单栏上setMenuBar(bar);// 设置菜单栏,使用这种方式设置菜单栏可以不占用布局空间//创建组件 jp1= new JPanel();jp2= new JPanel();jp3= new JPanel();jp1.setBackground(Color.WHITE);jp2.setBackground(Color.WHITE);jp3.setBackground(Color.WHITE);//jp1面板上上的内容String[][] datas = {};String[] titles = { "学号", "姓名","性别","年龄","专业" }; String[][] datas1 = {};String[] titles1 = { "课程号", "课程名","学分"}; DefaultTableModel myModel = new DefaultTableModel(datas, titles);// myModel存放表格的数据DefaultTableModel myModel1 = new DefaultTableModel(datas1, titles1);JTable table = new JTable(myModel);// 表格对象table的数据来源是myModel对象 JTable table1 = new JTable(myModel1);table.setPreferredScrollableViewportSize(new Dimension(550, 100));// 表格的显示尺寸table1.setPreferredScrollableViewportSize(new Dimension(550, 100));// 产生一个带滚动条的面板JScrollPane scrollPane = new JScrollPane(table);JScrollPane scrollPane1 = new JScrollPane(table1);//行高table.setRowHeight(20);table1.setRowHeight(20);Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();String strSQL="(Select * from dbo.student where Sname='"+ XX.user.getText()+"')";ResultSet rs=st.executeQuery(strSQL);if(rs.next()){Vector<String> ve = new Vector<String>();ve.addElement(rs.getString(1));ve.addElement(rs.getString(2));ve.addElement(rs.getString(3));ve.addElement(rs.getString(4));ve.addElement(rs.getString(5));myModel.addRow(ve); }String s1="(Select * from dbo.student,dbo.SC where Sname='"+XX.user.getText()+"' And student.Sno=SC.Sno)";ResultSet r1=st.executeQuery(s1);if(r1.next()){ String s2="(Select * from dbo.Course,dbo.SC where Sno='"+r1.getString(7)+"' And Course.Cno=SC.Cno)";ResultSet r2=st.executeQuery(s2);while(r2.next()){Vector<String> ve1 = new Vector<String>();ve1.addElement(r2.getString(1));ve1.addElement(r2.getString(2));ve1.addElement(r2.getString(4));myModel1.addRow(ve1); }}ImageIcon im1 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\Saved Pictures\\\\1.png");JLabel j=new JLabel(im1);ImageIcon im2 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\1.gif");JLabel j1=new JLabel(im2);JButton again=new JButton("刷 新~");again.setContentAreaFilled(false); again.setFont(new Font("楷体",Font.BOLD,14));again.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){ try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="jiaganyu";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();while(myModel1.getRowCount()>0){myModel1.removeRow(myModel1.getRowCount()-1);}String s1="(Select * from dbo.student,dbo.SC where Sname='"+XX.user.getText()+"' And student.Sno=SC.Sno)";ResultSet r1=st.executeQuery(s1);if(r1.next()){ String s2="(Select * from dbo.Course,dbo.SC where Sno='"+r1.getString(7)+"' And Course.Cno=SC.Cno)";ResultSet r2=st.executeQuery(s2);while(r2.next()){Vector<String> ve1 = new Vector<String>();ve1.addElement(r2.getString(1));ve1.addElement(r2.getString(2));ve1.addElement(r2.getString(4));myModel1.addRow(ve1); }conn.close();}}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");}}});//jp2面板上的内容String[][] datas2 = {};String[] titles2 = { "课程号", "课程名","学分" }; DefaultTableModel myModel2 = new DefaultTableModel(datas2, titles2);JTable table2 = new JTable(myModel2);table2.setRowHeight(20);table2.setPreferredScrollableViewportSize(new Dimension(550, 400));JScrollPane scrollPane2 = new JScrollPane(table2); String s2="(Select * from dbo.Course)";ResultSet r2=st.executeQuery(s2);while(r2.next()){Vector<String> ve2 = new Vector<String>();ve2.addElement(r2.getString(1));ve2.addElement(r2.getString(2));ve2.addElement(r2.getString(4));myModel2.addRow(ve2); }conn.close();JLabel a=new JLabel("请输入你想选的课的课程号:");a.setFont(new Font("楷体",Font.BOLD,18));JTextField b=new JTextField(20);JButton c=new JButton("确定");c.setFont(new Font("楷体",Font.BOLD,20));c.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();String ok=b.getText().trim();String s="(Select * from dbo.Course where Cno='"+ok+"' )";ResultSet r=st.executeQuery(s);if(r.next()){String s1="(Select * from dbo.student,dbo.SC where Sname='"+XX.user.getText()+"' And SC.Sno=student.Sno )";ResultSet r1=st.executeQuery(s1);if(r1.next()){String s2="(Select * from dbo.SC where Sno='"+r1.getString(1)+"' And Cno='"+ok+"' )";ResultSet r2=st.executeQuery(s2);if(r2.next()){JOptionPane.showMessageDialog(null, "你已经选过该科目了~","提示消息",JOptionPane.WARNING_MESSAGE);}else{ String ss="(Select * from dbo.student where Sname='"+XX.user.getText()+"')";ResultSet rr=st.executeQuery(ss);if(rr.next()){String strSQL="insert into dbo.SC(Sno,Cno) values('"+rr.getString(1)+"','"+ok+"')";int rr1=st.executeUpdate(strSQL);if(rr1==1){JOptionPane.showMessageDialog(null, "选课成功","提示消息",JOptionPane.WARNING_MESSAGE); } }}}}else{JOptionPane.showMessageDialog(null, "没有这种科目哦~","提示消息",JOptionPane.WARNING_MESSAGE);}conn.close();}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");} }});//jp3上的内容ImageIcon im3 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\f.gif");JLabel j2=new JLabel(im3);JLabel ja1=new JLabel("你想查询的科目是:");JLabel ja2=new JLabel("你的成绩是:");JLabel ja3=new JLabel("你的等级是:");JLabel ja4=new JLabel("(输入课程号哦~)");ja1.setFont(new Font("楷体",Font.BOLD,20));ja2.setFont(new Font("楷体",Font.BOLD,20));ja3.setFont(new Font("楷体",Font.BOLD,20));ja4.setFont(new Font("楷体",Font.BOLD,15));JTextField b1=new JTextField(15);JTextField b2=new JTextField(15);JTextField b3=new JTextField(15);JButton c1=new JButton("查 询");c1.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();String B1=b1.getText().trim();String L="(Select * from dbo.student,dbo.SC where Sname='"+XX.user.getText()+"' And Cno='"+B1+"' And SC.Sno=student.Sno )";ResultSet M=st.executeQuery(L);if(M.next()){b2.setText(M.getString(9));b3.setText(M.getString(10));}else{JOptionPane.showMessageDialog(null, "没有该科目的成绩哦~","提示消息",JOptionPane.WARNING_MESSAGE);}conn.close();}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");}}});jp1.setLayout(null);//自由布局jp2.setLayout(null);//自由布局jp3.setLayout(null);//自由布局//jp1中组件的位置scrollPane.setBounds(50, 190, 550, 70);scrollPane1.setBounds(50, 290, 550, 100);j.setBounds(250, 20, 150, 150);j1.setBounds(180, 370, 300, 150);again.setBounds(490, 140, 80, 30);//jp2中组件的位置scrollPane2.setBounds(50, 20, 550, 400);a.setBounds(50, 470, 270, 30);b.setBounds(320, 470, 150, 25);c.setBounds(500, 470, 80, 27);//jp3中组件的位置j2.setBounds(430, 330, 200, 200);ja1.setBounds(50, 50, 200, 30);ja2.setBounds(80, 220, 150, 30);ja3.setBounds(80, 270, 150, 30);ja4.setBounds(255, 80, 150, 30);b1.setBounds(260, 50, 150, 25);b2.setBounds(260, 220, 100, 25);b3.setBounds(260, 270, 100, 25);c1.setBounds(450, 50, 70, 30);// 将组件添加入jp1窗口中 jp1.add(scrollPane);jp1.add(scrollPane1);jp1.add(j);jp1.add(j1);jp1.add(again);// 将组件添加入jp2窗口中jp2.add(scrollPane2);jp2.add(a);jp2.add(b);jp2.add(c);// 将组件添加入jp3窗口中jp3.add(j2);jp3.add(ja1);jp3.add(ja2);jp3.add(ja3);jp3.add(ja4);jp3.add(b1);jp3.add(b2);jp3.add(b3);jp3.add(c1);jtbp=new JTabbedPane(JTabbedPane.LEFT); //创建选项卡并使选项卡垂直排列jtbp.add("个人信息",jp1); jtbp.add("选课",jp2);jtbp.add("成绩查询",jp3);jtbp.setFont(new Font("楷体",Font.PLAIN,30)); this.add(jtbp); //添加选项卡窗格到容器 }public void closeThis()//关闭当前界面{this.dispose();}
}
管理员界面:
功能简单介绍一下:
有全部信息展示,也可以通过查询学号来展示,某一个人的所有信息;
然后就是增删改功能,增加:增加新学生或增加新课程(只能添加新的,如果添加已存在同学则会提示,学生信息所有必须填写或者课程信息所有必须填写);删除:删除某个学生的某些信息或删除一门课程(我不允许退学的事情发生哈哈哈哈);修改:修改某位学生的某个信息或课程信息。
界面也是用到了分屏这个是上下分屏,并且没有隐藏分屏线,并且它可以上下移动调节。
然后说一下表格如何创建:
String[][] datas = {};
String[] titles = { "学号", "姓名","性别","年龄","专业" }; //创建表头
DefaultTableModel myModel = new DefaultTableModel(datas, titles);// myModel存放表格的数据
JTable table = new JTable(myModel);// 表格对象table的数据来源是myModel对象
table.setPreferredScrollableViewportSize(new Dimension(550, 100));// 表格的显示尺寸
JScrollPane scrollPane = new JScrollPane(table); // 产生一个带滚动条的面板
table.setRowHeight(20);//行高
jp1.add(scrollPane);//然后添加到你要添加到的面板里即可
这里用到的表为SC,Student,Course表:
CREATE TABLE SC
(Sno CHAR(9),
Cno CHAR(4),
Grade SMALLINT,
PRIMARY KEY(Sno,Cno),/*主码由两个属性构成,必须作为表级完整性进行定义 */
FOREIGN KEY(Sno) REFERENCES Student(Sno),/*表级完整性约束条件,Sno是外码,被参照表是Student */
FOREIGN KEY(Cno) REFERENCES Course(Cno)/*表级完整性约束条件,Cno是外码,被参照表是Course */
);CREATE TABLE Student
( Sno CHAR(9) PRIMARY KEY,/*列级完整性约束条件,Sno是主码 */Sname CHAR(20) UNIQUE,/*Sname取唯一值 */Ssex CHAR(2),Sage SMALLINT,Sdept CHAR(20));CREATE TABLE Course
(Cno CHAR(4) PRIMARY KEY,/* 列级完整性约束条件,Cno是主码*/
Cname CHAR(40) NOT NULL,/* 列级完整性约束条件,Cname不能取空值 */
Cpno CHAR(4),/ * Cpno的含义是先修课 */
Ccredit SMALLINT,
FOREIGN KEY (Cpno) REFERENCES Course(Cno)/*表级完整性约束条件,Cpno是外码,被参照表是Course,被参照列是Cno */
);
管理员界面主要就是表格的建立和信息展示,所以只展示全部信息展示那里的代码(别的也都是重复这些):
component8.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();//清空之前的数据while(myModel.getRowCount()>0){myModel.removeRow(myModel.getRowCount()-1);}while(myModel1.getRowCount()>0){myModel1.removeRow(myModel1.getRowCount()-1);}while(myModel2.getRowCount()>0){myModel2.removeRow(myModel2.getRowCount()-1);}while(myModel3.getRowCount()>0){myModel3.removeRow(myModel3.getRowCount()-1);}String strSQL="(Select * from dbo.student)";ResultSet rs=st.executeQuery(strSQL);while(rs.next()){ Vector<String> v = new Vector<String>();v.addElement(rs.getString(1));v.addElement(rs.getString(2));v.addElement(rs.getString(3));v.addElement(rs.getString(4));v.addElement(rs.getString(5));myModel.addRow(v); }String strSQL1="(Select * from dbo.Course)";ResultSet rs1=st.executeQuery(strSQL1);while(rs1.next()){ Vector<String> v1 = new Vector<String>();v1.addElement(rs1.getString(1));v1.addElement(rs1.getString(2));v1.addElement(rs1.getString(4));myModel1.addRow(v1);} String strSQL2="(Select * from dbo.SC)";ResultSet rs2=st.executeQuery(strSQL2);while(rs2.next()){Vector<String> v2 = new Vector<String>();v2.addElement(rs2.getString(1));v2.addElement(rs2.getString(2));v2.addElement(rs2.getString(3));v2.addElement(rs2.getString(4));myModel2.addRow(v2);}String strSQL3="(Select * from dbo.PY)";ResultSet rs3=st.executeQuery(strSQL3);while(rs3.next()){Vector<String> v3 = new Vector<String>();v3.addElement(rs3.getString(1));v3.addElement(rs3.getString(2));v3.addElement(rs3.getString(3));v3.addElement(rs3.getString(4));myModel3.addRow(v3);}conn.close();}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");} }});
增加信息:
package homework;import java.awt.Color;//省略咯!!public class add extends JFrame{ /*** */private static final long serialVersionUID = 1L;public add() {super("添加信息"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);this.setSize(500,550); this.setLocationRelativeTo(null);setVisible(true);JPanel frame=new JPanel(); frame.setBackground(Color.PINK);this.add(frame);JLabel j=new JLabel("学号:"); j.setFont(new Font("楷体",Font.PLAIN,20));//设置字体的字体,样子,大小 JLabel j1=new JLabel("姓名:");j1.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j2=new JLabel("性别:");j2.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j3=new JLabel("年龄:");j3.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j4=new JLabel("专业:");j4.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j5=new JLabel("课程:");j5.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j6=new JLabel("成绩:");j6.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j7=new JLabel("等级:");j7.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j11=new JLabel("课程号:");j11.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j12=new JLabel("课程名:");j12.setFont(new Font("楷体",Font.PLAIN,20)); JLabel j13=new JLabel("学分:"); j13.setFont(new Font("楷体",Font.PLAIN,20));JLabel j8=new JLabel("(温馨提醒:添加学生信息学号必填哦~,右边一列为课程信息)");j8.setFont(new Font("宋体",Font.PLAIN,11));JButton aa=new JButton("确定");aa.setFont(new Font("楷体",Font.PLAIN,20));aa.setBackground(Color.GREEN);JButton bb=new JButton("重置");bb.setFont(new Font("楷体",Font.PLAIN,20));bb.setBackground(Color.RED);ImageIcon im1 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\a.gif");JLabel i=new JLabel(im1);ImageIcon im2 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\b.gif");JLabel i1=new JLabel(im2);JLabel i2=new JLabel(im2);JLabel i3=new JLabel(im2);JTextField c=new JTextField(15);//学号JTextField c1=new JTextField(15);//姓名JTextField c3=new JTextField(15);//年龄JTextField c11=new JTextField(15);//课程号JTextField c12=new JTextField(15);//课程名JTextField c13=new JTextField(15);//学分 JTextField c2=new JTextField(15);//性别JTextField c4=new JTextField(15);//专业JTextField c7=new JTextField(15);//等级 JTextField c5=new JTextField(20);//课程JTextField c6=new JTextField(20);//成绩aa.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();String a=c.getText().trim(); String a1=c1.getText().trim(); String a2=c3.getText().trim(); String a3=c5.getText().trim(); String a4=c6.getText().trim(); String a11=c11.getText().trim(); String a12=c12.getText().trim();String a13=c13.getText().trim(); String a5=c2.getText().trim(); String a6=c4.getText().trim(); String a7=c7.getText().trim();String s="(Select * from dbo.Student where Sno='"+a+"')";ResultSet r=st.executeQuery(s);if(r.next()){JOptionPane.showMessageDialog(null, "该同学已存在哦~","提示消息",JOptionPane.WARNING_MESSAGE);}else{ if(a==null){String s3="insert into dbo.Course(Cno,Cname,Ccredit) values('"+a11+"','"+a12+"','"+a13+"')";int r3=st.executeUpdate(s3);if(r3==1){JOptionPane.showMessageDialog(null, "添加成功","提示消息",JOptionPane.WARNING_MESSAGE); }}else{String s1="insert into dbo.student(Sno,Sname,Ssex,Sage,Sdept) values('"+a+"','"+a1+"','"+a5+"','"+a2+"','"+a6+"')";int r1=st.executeUpdate(s1);String s2="insert into dbo.SC(Sno,Cno,Grade,LEVEL) values('"+a3+"','"+a4+"','"+a7+"')";int r2=st.executeUpdate(s2);if(r1==1&&r2==1){JOptionPane.showMessageDialog(null, "添加成功","提示消息",JOptionPane.WARNING_MESSAGE); } }} conn.close();}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");} }});//重置清零bb.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){c.setText("");c1.setText("");c2.setText(""); c3.setText("");c4.setText("");c5.setText("");c6.setText("");c11.setText("");c12.setText("");c13.setText("");}}); frame.setLayout(null);//自由布局j.setBounds(20, 30, 50, 20); c.setBounds(80, 30, 120, 25); j1.setBounds(20, 70, 50, 20);c1.setBounds(80, 70, 100, 25); j2.setBounds(20, 110, 50, 30);c2.setBounds(80, 110, 100, 25); j3.setBounds(20, 150, 50, 30);c3.setBounds(80, 150, 100, 25); j4.setBounds(20, 190, 50, 30);c4.setBounds(80, 190, 100, 25); j5.setBounds(20, 230, 50, 30);c5.setBounds(80, 230, 100, 25); j6.setBounds(20, 270, 50, 30);c6.setBounds(80, 270, 100, 25); j7.setBounds(20, 310, 50, 30); c7.setBounds(80, 310, 100, 25);j11.setBounds(300, 120, 70, 30); c11.setBounds(380, 120, 100, 25); j12.setBounds(300, 170, 70, 30); c12.setBounds(380, 170, 100, 25); j13.setBounds(300, 230, 70, 30); c13.setBounds(380, 230, 100, 25); aa.setBounds(100, 400, 100, 30); bb.setBounds(300, 400, 100, 30); j8.setBounds(10, 480, 450, 15); i.setBounds(220,330,60,60); i1.setBounds(220,250,60,60);i2.setBounds(220,170,60,60);i3.setBounds(220,90,60,60);frame.add(j); frame.add(j1); frame.add(j2); frame.add(j3); frame.add(j4); frame.add(j5); frame.add(j6); frame.add(j7); frame.add(j11); frame.add(j12);frame.add(j13);frame.add(c11); frame.add(c12);frame.add(c13);frame.add(c); frame.add(c1); frame.add(c2); frame.add(c3); frame.add(c4); frame.add(c5); frame.add(c6); frame.add(c7); frame.add(aa); frame.add(bb);frame.add(j8); frame.add(i); frame.add(i1); frame.add(i2); frame.add(i3); } }
删除信息:
package homework;import java.awt.Color;//省略咯!!public class delete extends JFrame{/*** */private static final long serialVersionUID = 1L;public delete(){super("删除信息"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);this.setSize(500,550); this.setLocationRelativeTo(null);setVisible(true);JPanel frame=new JPanel(); frame.setBackground(Color.PINK);this.add(frame);JCheckBox optionA=new JCheckBox(" 姓名");JCheckBox optionB=new JCheckBox(" 性别");JCheckBox optionC=new JCheckBox(" 年龄");JCheckBox optionD=new JCheckBox(" 专业");JCheckBox optionE=new JCheckBox(" 成绩");JCheckBox optionF=new JCheckBox(" 等级");optionA.setContentAreaFilled(false); optionA.setFont(new Font("楷体",Font.PLAIN,20));optionB.setContentAreaFilled(false); optionB.setFont(new Font("楷体",Font.PLAIN,20));optionC.setContentAreaFilled(false); optionC.setFont(new Font("楷体",Font.PLAIN,20));optionD.setContentAreaFilled(false); optionD.setFont(new Font("楷体",Font.PLAIN,20));optionE.setContentAreaFilled(false); optionE.setFont(new Font("楷体",Font.PLAIN,20));optionF.setContentAreaFilled(false); optionF.setFont(new Font("楷体",Font.PLAIN,20));JLabel j=new JLabel("学号:");j.setFont(new Font("楷体",Font.PLAIN,20));//设置字体的字体,样子,大小 JTextField c1=new JTextField(12);JLabel cc=new JLabel("课程号:");cc.setFont(new Font("楷体",Font.PLAIN,20));JTextField c=new JTextField(12);JLabel j11=new JLabel("课程号:");j11.setFont(new Font("楷体",Font.PLAIN,20));JTextField c11=new JTextField(10);JLabel j12=new JLabel("课程名:");j12.setFont(new Font("楷体",Font.PLAIN,20)); JTextField c12=new JTextField(10);JLabel j1=new JLabel("(温馨提醒:谨慎删除哦~)");j1.setFont(new Font("宋体",Font.PLAIN,12));JButton aa=new JButton("确定"); aa.setFont(new Font("楷体",Font.PLAIN,20));aa.setBackground(Color.GREEN); JButton bb=new JButton("重置"); bb.setFont(new Font("楷体",Font.PLAIN,20));bb.setBackground(Color.RED);aa.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=SCHOOL";String user="sa";//sa超级管理员String password="你的密码";//密码Connection conn=DriverManager.getConnection(url,user,password);Statement st=conn.createStatement();String a=c1.getText().trim();String a1=c.getText().trim();String s="(Select * from dbo.Student where Sno='"+a+"')";ResultSet r=st.executeQuery(s);if(r.next()){if(optionA.isSelected()){String strSQL="update dbo.Student set Sname="+null+" where Sno='"+a+"'"; }if(optionB.isSelected()){String strSQL="update dbo.Student set Ssex="+null+" where Sno='"+a+"'"; }if(optionC.isSelected()){String strSQL="update dbo.Student set Sage="+null+" where Sno='"+a+"'"; }if(optionD.isSelected()){String strSQL="update dbo.Student set Sdept="+null+" where Sno='"+a+"'"; } if(optionE.isSelected()){String strSQL="update dbo.SC set Grade="+null+" where Sno='"+a+"' And Cno='"+a1+"'"; } if(optionF.isSelected()){String strSQL="update dbo.SC set LEVEL="+null+" where Sno='"+a+"' And Cno='"+a1+"'"; } JOptionPane.showMessageDialog(null,"删除成功哦~");}else{String cc=c11.getText().trim();String strSQL="delete from dbo.Course where Cno='"+cc+"' "; int rr=st.executeUpdate(strSQL);if(rr==1){JOptionPane.showMessageDialog(null,"删除成功哦~");}else{JOptionPane.showMessageDialog(null,"课程不存在哦~");}}conn.close();}catch (ClassNotFoundException ex) {System.out.println("没有找到对应的数据库驱动类");}catch (SQLException ex) {System.out.println("数据库连接或者是数据库操作失败");} }});//重置清零bb.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){c1.setText("");c11.setText("");c12.setText("");optionA.setSelected(false);optionB.setSelected(false);optionC.setSelected(false);optionD.setSelected(false);optionE.setSelected(false);optionF.setSelected(false);}});ImageIcon im1 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\c.gif");JLabel i=new JLabel(im1);ImageIcon im2 =new ImageIcon("C:\\\\Users\\\\小甘同学\\\\Pictures\\\\b.gif");JLabel i1=new JLabel(im2);JLabel i2=new JLabel(im2);JLabel i3=new JLabel(im2);frame.setLayout(null);//自由布局//省略下面的组件放置位置以及添加组件的代码}
}
写的时候还不觉得什么,当整体看起来就会发现很多重复的代码,尤其是我几乎每个字体都重新设置了,这就导致每设置一个就得写一遍重复的,我就在网上查找是否有全局字体设置,找到了一篇博客,大家可以参考:点我哦~
欧克,有很多不足,继续努力吧。
视频讲解(略有不同):哔哩哔哩~
2020/12/24
上传到了GitHub,可直接下载,评论区有百度网盘链接
GitHub下载~
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