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学生课程注册管理系统_1.根据如下课程注册管理系统的类图,以java语言,应用面向对象的对象,类,继承,多态,

作者：Guff_9hys | 2024-07-10 23:55:10

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1.根据如下课程注册管理系统的类图,以java语言,应用面向对象的对象,类,继承,多态,

        学生课程注册管理系统的实现

实验内容与步骤

1.设计课程注册管理系统的类图，应用面向对象的对象，类，继承，多态，聚合的方法实现各个类

 2.设计一个Student类 ，该类包括学生学号sID和用户账号及密码

 3.设计一个teacher类，该类包括教师号tID和职称Level实现教师信息显示及课程安排

 4.设计一个register类，包括实现注册管理员的信息显示及其课程设置           

     类图:

项目结构：

 login.java：

  1. package sy1.student;
  2.  
  3. import javax.swing.*;
  4. import java.awt.*;
  5. import java.sql.Connection;
  6. import java.sql.ResultSet;
  7. import java.sql.Statement;
  8.  
  9. public class login extends JFrame {
  10.     public int width = Toolkit.getDefaultToolkit().getScreenSize().width;//获取屏幕的宽
  11.     public int height = Toolkit.getDefaultToolkit().getScreenSize().height;//获取屏幕的高
  12.     JPanel jp = new JPanel();
  13.     ImageIcon image = new ImageIcon("out/production/zhuceglixitong/sy1/student/R-C.jpg");
  14.     private JLabel JLtitle;
  15.     private JLabel JLname;
  16.     private JLabel JLpwd;
  17.     static JTextField JTname;
  18.     static JPasswordField JTpwd;
  19.     private JButton JBsure;
  20.     private JRadioButton Bt1, Bt2, Bt3;       //定义单选按钮
  21.     ButtonGroup group = new ButtonGroup();    //按钮组 实现单选
  22.     public login() {// 登录界面
  23.         this.setTitle("学生选课系统");
  24.         this.setBounds((width - 800) / 2, (height - 600) / 2 - 20, 800, 600); //使窗体居中
  25.         this.setResizable(false);
  26.         JLtitle = new JLabel("用户登录界面");
  27.         JLtitle.setFont(new java.awt.Font("宋体", 4, 50));
  28.         JLtitle.setForeground(Color.black);
  29.         JLname = new JLabel("用户名：");//设置Label和按钮名
  30.         JLname.setForeground(Color.black);
  31.         JLpwd = new JLabel("密  码：");
  32.         JLpwd.setForeground(Color.black);
  33.         JLpwd.setFont(new java.awt.Font("宋体", 4, 20));
  34.         JTname = new JTextField(25);
  35.         JTpwd = new JPasswordField(25);//文本框
  36.         JLname.setFont(new java.awt.Font("宋体", 4, 20));
  37.         JBsure = new JButton("登录");
  38.         Bt1 = new JRadioButton("学生");
  39.         Bt2 = new JRadioButton("老师");
  40.         Bt3 = new JRadioButton("管理员");
  41.         JLabel background = new JLabel(image);   //将背景图片封装为一个JLable
  42. //        Jrb1.setFocusPainted(false);
  43. //        Jrb2.setFocusPainted(false);
  44. //        Jrb3.setFocusPainted(false);
  45.         Bt3.setBounds(525, 330, 65, 35);
  46.         Bt2.setBounds(470, 330, 55, 35);
  47.         Bt1.setBounds(415, 330, 55, 35);
  48.         JLtitle.setBounds(360, 50, 300, 100);
  49.         JLname.setBounds(370, 240, 80, 35);//设置Label和按钮大小
  50.         JTname.setBounds(450, 240, 170, 25);
  51.         JLpwd.setBounds(370, 280, 80, 35);
  52.         JTpwd.setBounds(450, 280, 170, 25);
  53.         JBsure.setBounds(420, 380, 170, 35);
  54. //        JBexit.setBounds(180,130,60,25);
  55.         background.setBounds(0, 0, 800, image.getIconHeight());
  56.         background.setOpaque(false); //背景透明
  57.         background.setLayout(null);
  58.         group.add(Bt1);
  59.         group.add(Bt2);
  60.         group.add(Bt3);    //将单选组件放在一个组件组里从而实现单选
  61.         background.add(this.Bt1);
  62.         background.add(this.Bt2);
  63.         background.add(this.Bt3);
  64.         background.add(JLtitle);
  65.         background.add(JLname);
  66.         background.add(JTname);
  67.         background.add(JLpwd);
  68.         background.add(JTpwd);
  69.         background.add(JBsure);
  70.         jp.add(background);
  71.         this.add(jp);
  72.         this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
  73.         this.setVisible(true);
  74. //       //添加按钮组件监听
  75.         Bt1.addActionListener(e -> {
  76.              JBsure.addActionListener(a-> {
  77.                     String  studentname= JTname.getText();
  78.                     String  studentpassword= String.valueOf(JTpwd.getPassword());
  79.                     if(studentname.equals("")){
  80.                         JOptionPane.showMessageDialog(null,"账号不能为空","警告⚠",JOptionPane.ERROR_MESSAGE);
  81.                     }
  82.                     if(studentpassword.equals("")){
  83.                         JOptionPane.showMessageDialog(null,"密码不能为空","警告⚠",JOptionPane.ERROR_MESSAGE);
  84.                     }
  85.                     try{
  86.                         new SQLConnection();
  87.                             Connection con= SQLConnection.getConnection();
  88.                             Statement sta=con.createStatement();
  89.                             String sql="select * from student where username='"+studentname+"'and password= '"+ studentpassword+"'";
  90.                             ResultSet rs=sta.executeQuery(sql);
  91.                         if (rs.next()) {
  92.                             this.dispose();
  93.                             new Student();
  94.                         }
  95.                         else {
  96.                             //弹出消息对话框
  97.                             JOptionPane.showMessageDialog(null,"账号或者密码错误","警告⚠",JOptionPane.ERROR_MESSAGE);
  98.                             JTpwd.requestFocus();
  99.                         }
  100.  
  101.                     }catch(Exception e1){
  102.                           e1.printStackTrace();
  103.                     }
  104.  
  105.              });
  106.         });
  107.         Bt2.addActionListener(e -> {//teacher登录
  108.                  JBsure.addActionListener(a->{
  109.                           String  teachername=JTname.getText();
  110.                           String  teacherpassword=String.valueOf(JTpwd.getPassword());//转换为String类型
  111.                          if(teachername.equals("")){
  112.                              JOptionPane.showMessageDialog(null,"账号不能为空","警告⚠",JOptionPane.ERROR_MESSAGE);         //同理判断是否为空
  113.                          }
  114.                          if(teacherpassword.equals("")){
  115.                              JOptionPane.showMessageDialog(null,"密码不能为空","警告⚠",JOptionPane.ERROR_MESSAGE);
  116.                          }
  117.                          try{
  118.                              new SQLConnection();
  119.                              Connection con= SQLConnection.getConnection();
  120.                              Statement sta=con.createStatement();
  121.                              String sql="select * from teacher where teachername='"+teachername+"'and teacherpassword= '"+ teacherpassword+"'";
  122.                              ResultSet rs=sta.executeQuery(sql);
  123.                              if(rs.next()){
  124.                                  this.dispose();//关闭窗口释放一定资源
  125.                                  new teacher();
  126.                              }else{
  127.                                  JOptionPane.showMessageDialog(null,"账号或者密码错误","警告⚠",JOptionPane.ERROR_MESSAGE);
  128.                                  JTpwd.requestFocus();
  129.                              }
  130.                          }catch (Exception e1) {
  131.                          }
  132.                  });
  133.         });
  134.      Bt3.addActionListener(e -> {//管理员登录
  135.         JBsure.addActionListener(a->{
  136.             String  rname=JTname.getText();
  137.             String  rpassword=String.valueOf(JTpwd.getPassword());//转换为String类型
  138.             if(rname.equals("")){
  139.                 JOptionPane.showMessageDialog(null,"账号不能为空","警告⚠",JOptionPane.ERROR_MESSAGE);         //同理判断是否为空
  140.             }
  141.             if(rpassword.equals("")){
  142.                 JOptionPane.showMessageDialog(null,"密码不能为空","警告⚠",JOptionPane.ERROR_MESSAGE);
  143.             }
  144.             try{
  145.                 new SQLConnection();
  146.                 Connection con= SQLConnection.getConnection();
  147.                 Statement sta=con.createStatement();
  148.                 String sql="select * from register where rname='"+rname+"'and rpassword= '"+rpassword+"'";
  149.                 ResultSet rs=sta.executeQuery(sql);
  150.                 if(rs.next()){
  151.                     this.dispose();//关闭窗口释放一定资源
  152.                     new Register();
  153.                 }else{
  154.                     JOptionPane.showMessageDialog(null,"账号或者密码错误","警告⚠",JOptionPane.ERROR_MESSAGE);
  155.                     JTpwd.requestFocus();
  156.                 }
  157.             }catch (Exception e1) {
  158.             }
  159.         });
  160.     });
  161. }
  162.         public static void main(String []args){
  163.           new login();
  164.         }
  165. }

student.java：

  1. import java.util.Vector;
  2. import javax.swing.table.DefaultTableCellRenderer;
  3. import javax.swing.table.DefaultTableModel;
  4. //显示该登录的学生的基本信息 和 所学修的课程信息 数据库
  5. public class Student extends JFrame {
  6.     private JButton bt1;
  7.     public String sID;
  8.     public String Grade;
  9.     private JButton bt2;
  10.     private JTable table1;
  11.     String name = login.JTname.getText();
  12.     public Student(){
  13.         ImageIcon background = new ImageIcon("out/production/zhuceglixitong/sy1/student/01c8f15aeac135a801207fa16836ae.jpg@1280w_1l_2o_100sh.jpg");
  14.         JLabel label = new JLabel(background);
  15.         // 把标签的大小位置设置为图片刚好填充整个面板
  16.         label.setBounds(0, 0, this.getWidth(), this.getHeight());
  17.         // 把内容窗格转化为JPanel，否则不能用方法setOpaque()来使内容窗格透明
  18.         JPanel imagePanel = (JPanel) this.getContentPane();
  19.         imagePanel.setOpaque(false);
  20.         // 把背景图片添加到分层窗格的最底层作为背景
  21.         this.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));
  22.           this.setTitle("学生界面");
  23.           this.setBounds(450,100,1200,900);
  24.           this.setVisible(true);
  25.           this.setResizable(false);
  26.           this.setLayout(null);
  27.           bt1=new JButton("学生信息显示");
  28.           bt2=new JButton("学生选课信息");
  29.           bt1.setFont(new java.awt.Font("宋体",4,25));
  30.           bt2.setFont(new java.awt.Font("宋体",4,25));
  31.           JLabel jl=new JLabel();
  32.           JLabel we=new JLabel("欢迎来到学生信息界面！");
  33.           jl.setBounds(100,100,300,800);
  34.           we.setBounds(600,300,600,300);
  35.           we.setFont(new java.awt.Font("楷体",4,45));
  36.           bt1.setBounds(100,150,200,100);
  37.           bt2.setBounds(100,400,200,100);
  38.           jl.add(bt1);
  39.           jl.add(bt2);
  40.           this.add(jl);
  41.           this.add(we);
  42.  
  43.           bt1.addActionListener(e->{
  44.               Vector titlename = new Vector();//{"学号","年级"};
  45.               titlename.add("学号");
  46.               titlename.add("年级");
  47.               titlename.add("姓名");
  48.               titlename.add("年龄");
  49.               Vector rowdata = new Vector();  //数据
  50.               ResultSet rs = null;
  51.               try {
  52.                   new SQLConnection(); //连接数据库
  53.                   Connection con = SQLConnection.getConnection();
  54.                   Statement stmt = con.createStatement();   //statement声明
  55.                   String sql = "select sID,Grade,name,sage from student where username = '" + name + "' "; //SQL选择查询语句以该账号为条件查询该表
  56.                   rs = stmt.executeQuery(sql);
  57.  
  58.               } catch (Exception e1) {
  59.                   System.out.println(e1);
  60.                   System.out.println("查询出错");
  61.               }
  62.               try{
  63.                   while (rs.next()) {
  64.                       Vector hang = new Vector();
  65.                       hang.add(rs.getString("sID"));
  66.                       hang.add(rs.getString("Grade"));
  67.                       hang.add(rs.getString("name"));
  68.                       hang.add(rs.getString("sage"));
  69.                       rowdata.add(hang);
  70.                   }
  71.               }catch(Exception e1){
  72.                   System.out.println("添加错误");
  73.               }
  74.  
  75.               table1 = new JTable(rowdata, titlename);
  76.               table1.setEnabled(false);   //表格不能编辑
  77.               table1.setFont(new java.awt.Font("宋体",4,20));
  78.               JScrollPane sroll = new JScrollPane(table1);
  79.               DefaultTableCellRenderer r=new DefaultTableCellRenderer();
  80.               r.setHorizontalAlignment(JLabel.CENTER);
  81.               table1.setDefaultRenderer(Object.class,r);
  82.  
  83.               JFrame jf = new JFrame();
  84.               jf.setTitle("个人信息");
  85.               jf.setBounds(200, 200, 600, 200); //使窗体居中
  86.               jf.setResizable(false);
  87.               jf.add(sroll);
  88.               jf.setVisible(true);
  89.  
  90.           });
  91.  
  92.           bt2.addActionListener(e->{
  93.               Vector tname = new Vector();
  94.               tname.add("课程名");
  95.               tname.add("课程号");
  96.               tname.add("学时");
  97.               tname.add("学分");
  98.               tname.add("上课教室");
  99.               tname.add("上课时间");
  100.               Vector rowdata = new Vector();  //数据
  101.               ResultSet rs = null;
  102.               try {
  103.                   new SQLConnection(); //连接数据库
  104.                   Connection con = SQLConnection.getConnection();
  105.                   Statement stmt = con.createStatement();   //statement声明
  106.                   String sql = "select cName,course.cID,xSS,xF,sKroom,sKtime from course,student,course_offering where course.cID=course_offering.cID and student.sID=course_offering.sID and username = '" + name + "' ";
  107.                   rs = stmt.executeQuery(sql);
  108.  
  109.               } catch (Exception e1) {
  110.                   System.out.println(e1);
  111.                   System.out.println("查询出错");
  112.               }
  113.               try{
  114.                   while (rs.next()) {
  115.                       Vector hang=new Vector();
  116.                       hang.add(rs.getString("cName"));
  117.                       hang.add(rs.getString("course.cID"));
  118.                       hang.add(rs.getString("xSS"));
  119.                       hang.add(rs.getString("xF"));
  120.                       hang.add(rs.getString("sKroom"));
  121.                       hang.add(rs.getString("sKtime"));
  122.                               rowdata.add(hang);
  123.                   }
  124.               }catch(Exception e1){
  125.                   System.out.println("添加错误");
  126.               }
  127.  
  128.               table1 = new JTable(rowdata, tname);
  129.               table1.setEnabled(false);   //表格不能编辑
  130.               table1.setFont(new java.awt.Font("宋体",4,20));
  131.               JScrollPane sroll = new JScrollPane(table1);
  132.               DefaultTableCellRenderer r=new DefaultTableCellRenderer();
  133.               r.setHorizontalAlignment(JLabel.CENTER);
  134.               table1.setDefaultRenderer(Object.class,r);
  135.  
  136.               JFrame jf = new JFrame();
  137.               jf.setTitle("课程信息");
  138.               jf.setBounds(200, 200, 600, 200); //使窗体居中
  139.               jf.setResizable(false);
  140.  
  141.               jf.add(sroll);
  142.               jf.setVisible(true);
  143.  
  144.           });
  145.     }
  146.  
  147.     public static void main(String []args){
  148.           new Student();//调用构造方法
  149.     }
  150. }

SQLConnection.java：这里需创建lib文件下并在lib目录下导入jar包

  1. package sy1.student;
  2. import java.sql.Connection;
  3. import java.sql.DriverManager;
  4. import java.sql.SQLException;
  5. public class SQLConnection {
  6.    public static  Connection getConnection(){
  7.       String driver = "com.mysql.cj.jdbc.Driver";//使用Jar包驱动
  8.       String url = "jdbc:mysql://localhost:3306/studentinform?useUnicode=true&characterEncoding=utf8&useSSL=true";
  9.       String username = "root";//数据库用户名
  10.       String password = "1828808086";//数据库密码
  11.       Connection conn = null;
  12.       try {
  13.          Class.forName(driver); //classLoader,加载对应驱动
  14.          conn = (Connection) DriverManager.getConnection(url, username, password);
  15.          System.out.println("数据库已连接");
  16.       } catch (ClassNotFoundException e) {//异常捕获
  17.          e.printStackTrace();
  18.       } catch (SQLException e) {
  19.          e.printStackTrace();
  20.       }
  21.       return conn;
  22.    }
  23.    public static void main(String[] args) {
  24.       SQLConnection.getConnection();
  25.    }
  26. }

teacher表：

 student表：

register表：

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