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1、文件addmessage.java代码：import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;import javax.swing.table.*;class addmessage extends JFrame implements ActionListener JTextField t1,t2,t3,t4,t5; JTable table; JButton but1; JLabel lab1,lab2,lab3,lab4,lab5; JPanel
2、p1; addmessage() super(增加); setBounds(350,100,470,400); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); lab1=new JLabel(学号); t1=new JTextField(10); lab2=new JLabel(姓名); t2=new JTextField(10); lab3=new JLabel(课程名); t3=new JTextField(10); lab4=new JLabel(状态); t4=new JTextField(10); lab5=new JLab
3、el(成绩); t5=new JTextField(10); but1=new JButton(添加); but1.addActionListener(this); p1.add(lab1); p1.add(t1); p1.add(lab2); p1.add(t2); p1.add(lab3); p1.add(t3); p1.add(lab4); p1.add(t4); p1.add(lab5); p1.add(t5); p1.add(but1); add(p1); setVisible(true); public void actionPerformed(ActionEvent e) int
4、 i=0 ; String sql1=null,sql2=null,update=null;String url=jdbc:mysql:/localhost:3306/学生成绩系统; Connection con; Statement stmt;try Class.forName(org.gjt.mm.mysql.Driver); catch(java.lang.ClassNotFoundException e1) System.err.println(ClassNotFoundException:+e1.getMessage(); if(e.getSource()=but1) /添加- tr
5、y con=DriverManager.getConnection(url,root,123); stmt=con.createStatement(); sql1=INSERT INTO 学生成绩表 VALUES (+t1.getText()+,+t2.getText()+,+t3.getText()+,+t4.getText()+,+t5.getText()+); String num1=t1.getText(); String num2=t1.getText(); String sele=select * from 学生成绩表 where 学号=+num1+ and 课程名=+num2+;
6、 ResultSet rs=stmt.executeQuery(sele); if(rs.next() JOptionPane.showMessageDialog(this, 已有该条记录，请核实！); else stmt.executeUpdate(sql1); JOptionPane.showMessageDialog(this, 添加成功!); t1.setText(); t2.setText(); t3.setText(); t4.setText(); t5.setText(); stmt.close(); con.close(); catch(SQLException ex) Sys
7、tem.err.println(SQLException:+ex.getMessage(); 文件deletemessage.java代码import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;import javax.swing.table.*;class deletemessage extends JFrame implements ActionListener JTextField t1,t2,t3; JTable table; JButton
8、but1; JLabel lab1,lab2,lab3; JPanel p1; deletemessage() super(删除); setBounds(350,100,470,400); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); lab1=new JLabel(学号); t1=new JTextField(10); lab2=new JLabel(姓名); t2=new JTextField(10); lab3=new JLabel(课程名); t3=new JTextField(10); but1=new JButton(删
9、除); but1.addActionListener(this); p1.add(lab1); p1.add(t1); p1.add(lab2); p1.add(t2); p1.add(lab3); p1.add(t3); p1.add(but1); add(p1); setVisible(true); public void actionPerformed(ActionEvent e) String sql1=null,sql2=null;String url=jdbc:mysql:/localhost:3306/学生成绩系统; Connection con; Statement stmt;
10、try Class.forName(org.gjt.mm.mysql.Driver); catch(java.lang.ClassNotFoundException e1) System.err.println(ClassNotFoundException:+e1.getMessage(); if(e.getSource()=but1) /删除- try String num1=t1.getText(); String num2=t2.getText(); String num3=t3.getText(); sql2=delete from 学生成绩表 where 学号=+num1+and 课
11、程名=+num3+; con=DriverManager.getConnection(url,root,123); stmt=con.createStatement(); sql1=select * from 学生成绩表 where 学号=+num1+ and 姓名=+num2+ and 课程名=+num3+; ResultSet rs=stmt.executeQuery(sql1); if(rs.next() stmt.executeUpdate(sql2); JOptionPane.showMessageDialog(this, 删除成功!); else JOptionPane.showM
12、essageDialog(this, 没有此条记录!请重新输入); t1.setText(); stmt.close(); con.close(); catch(SQLException ex) System.err.println(SQLException:+ex.getMessage(); 文件entry.java代码import java.awt.*;import java.awt.event.*;import java.sql.*;import javax.swing.*;class entry extends JFrame implements ActionListener int
13、flag=1; String user,pass; JPanel pa; JLabel lab1,lab2; JTextField tf1; JPasswordField tf2; JButton btu1,btu2; JPanel pa1,pa2,pa4; entry()super(学生成绩管理系统);setBounds(400,200,400,300);GridBagLayout gbL=new GridBagLayout(); GridBagConstraints gbc=new GridBagConstraints(); setLayout(gbL); gbc.fill=GridBag
14、Constraints.HORIZONTAL;gbc.anchor=GridBagConstraints.CENTER; lab1=new JLabel(请输入帐号);lab2=new JLabel(请输入密码); tf2=new JPasswordField(10); tf2.setEchoChar(*);tf1=new JTextField(10);tf1.addActionListener(this);pa1=new JPanel();pa1.add(lab1);pa1.add(tf1);gbc.gridx=1;gbc.gridy=1; gbc.insets=new Insets(2,5
15、,0,5);gbL.setConstraints(pa1,gbc);add(pa1);tf2.addActionListener(this);pa2=new JPanel();pa2.add(lab2);pa2.add(tf2); gbc.gridx=1;gbc.gridy=2; gbc.insets=new Insets(2,5,2,5);gbL.setConstraints(pa2,gbc);add(pa2); btu1=new JButton(确定);btu1.addActionListener(this);btu2=new JButton(退出);btu2.addActionListe
16、ner(this);pa4=new JPanel();pa4.add(btu1);pa4.add(btu2);gbc.gridx=1;gbc.gridy=4; gbc.insets=new Insets(2,5,2,5);gbL.setConstraints(pa4,gbc);add(pa4); public void actionPerformed(ActionEvent e) loginsure ls; if(e.getSource()=btu1) user=tf1.getText(); pass=tf2.getText(); tryls=new loginsure(user,pass);
17、this.setVisible(false); catch (SQLException e1)e1.printStackTrace(); catch (ClassNotFoundException e1)e1.printStackTrace(); if(e.getSource()=btu2) dispose(); System.exit(0); class loginsure int i=0; String name=null,pwd=null, ustype=null; public loginsure(String s,String a) throws SQLException,Class
18、NotFoundExceptionString driver =org.gjt.mm.mysql.Driver; Class.forName(driver); String URL = jdbc:mysql:/localhost:3306/学生成绩系统; Connection conn = DriverManager.getConnection(URL,root,123); Statement stmt=conn.createStatement(); ResultSet rs = stmt.executeQuery(select * from 用户管理表); while (rs.next()
19、name=rs.getString(用户名).trim(); pwd=rs.getString(密码).trim(); ustype=rs.getString(权限组).trim(); if (s.equals(name)&a.equals(pwd) i=1; if(ustype.trim().equals(管理员) teacher tea=new teacher(); tea.setVisible(true); if(ustype.trim().equals(学生) student stu=new student(name); stu.setVisible(true); if(i=0) JO
20、ptionPane.showMessageDialog(null, 用户名或者密码错误, 警告,JOptionPane.WARNING_MESSAGE); stmt.close();conn.close(); 文件inquiry.java代码import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;import javax.swing.table.*;class inquiry extends JFrame implements ActionListen
21、er JTextField t1; JTable table; JButton but1; JLabel lab1; JPanel p1; JTable table1=null; DefaultTableModel demod1=null; String n=课程名,状态,成绩; String data=new String00; String No; inquiry(String no) super(成绩); No=no; setBounds(350,100,470,400); p1=new JPanel(); lab1=new JLabel(课程名); t1=new JTextField(
22、10); but1=new JButton(查询成绩); but1.addActionListener(this); p1.add(lab1); p1.add(t1); p1.add(but1); demod1=new DefaultTableModel(data,n); table1=new JTable(demod1); JScrollPane s1=new JScrollPane(table1); p1.add(s1); add(p1); setVisible(true); public void actionPerformed(ActionEvent e) int i=0; Strin
23、g sql1;String url=jdbc:mysql:/localhost:3306/学生成绩系统; Connection con; Statement stmt;try Class.forName(org.gjt.mm.mysql.Driver); catch(java.lang.ClassNotFoundException e1) System.err.println(ClassNotFoundException:+e1.getMessage(); if(e.getSource()=but1) try String num=t1.getText(); sql1=select * fro
24、m 学生成绩表 where 学号=+No+; if(!num.equals() sql1=select * from 学生成绩表 where 课程名=+num+and 学号=+No+; con=DriverManager.getConnection(url,root,123); stmt=con.createStatement(); ResultSet rs=stmt.executeQuery(sql1); removeAllRecord(); while(rs.next() Vector data=new Vector(); data.addElement(rs.getString(3);
25、data.addElement(rs.getString(4); data.addElement(rs.getString(5); demod1.addRow(data); i=1; if(i=0) JOptionPane.showMessageDialog(this, 没有此课程!请重新输入); table1.revalidate(); t1.setText(); stmt.close(); con.close(); catch(SQLException ex) System.err.println(SQLException:+ex.getMessage(); public void rem
26、oveAllRecord()/将界面上的所有记录清空 int rowcount; while(true)/删除所有存在的行rowcount = demod1.getRowCount()-1; if(rowcount = 0) demod1.removeRow(rowcount); demod1.setRowCount(rowcount); else break; 文件main.java代码import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;publ
27、ic class main public static void main(String args)entry ent=new entry();ent.setVisible(true); ent.setResizable(false); 文件record.java代码import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;import javax.swing.table.*;class record extends JFrame implements
28、ActionListener JTextField t1; TextArea t; JButton but1; JLabel L1; JPanel p1; JTable table1=null; DefaultTableModel demod1=null; String n=平均成绩,优秀,良好,不及格; String data=new String00; public record() super(统计); setBounds(350,30,470,610); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); L1=new JLabe
29、l(课程名); but1=new JButton(查询); but1.addActionListener(this); t1=new JTextField(10); p1.add(L1); p1.add(t1); p1.add(but1); demod1=new DefaultTableModel(data,n); table1=new JTable(demod1); JScrollPane s1=new JScrollPane(table1); p1.add(s1); add(p1); setVisible(true); public void actionPerformed(ActionE
30、vent e) int i=0; String sql1; String sql2;String url=jdbc:mysql:/localhost:3306/学生成绩系统; Connection con; Statement stmt;try Class.forName(org.gjt.mm.mysql.Driver); catch(java.lang.ClassNotFoundException e1) System.err.println(ClassNotFoundException:+e1.getMessage(); if(e.getSource()=but1) try String
31、num1=t1.getText(); if(num1.equals() JOptionPane.showMessageDialog(this, 学号不能为空,请输入学号！,JOptionPane.WARNING_MESSAGE); else sql1=select * from 学生成绩表 where 学号=+num1+; sql1=select avg(成绩) from 学生成绩表 where 课程名=+num1+; sql2=select count(*) from 学生成绩表 where 课程名=+num1+ and 成绩=90; con=DriverManager.getConnect
32、ion(url,root,123); stmt=con.createStatement(); ResultSet rs=stmt.executeQuery(sql1); removeAllRecord(); while(rs.next() Vector data=new Vector(); data.addElement(rs.getInt(1); /*data.addElement(rs.getString(3); data.addElement(rs.getString(4); data.addElement(rs.getString(5);*/ demod1.addRow(data);
33、i=1; rs=stmt.executeQuery(sql2); while(rs.next() int n = rs.getInt(1); System.out.println(n); if(i=0) JOptionPane.showMessageDialog(this, 没有此条记录!请重新输入); table1.revalidate(); t1.setText(); stmt.close(); con.close(); catch(SQLException ex) System.err.println(SQLException:+ex.getMessage(); public void
34、removeAllRecord()/将界面上的所有记录清空 int rowcount; while(true)/删除所有存在的行rowcount = demod1.getRowCount()-1; if(rowcount = 0) demod1.removeRow(rowcount); demod1.setRowCount(rowcount); else break; 文件revise.java代码import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*
35、;import javax.swing.table.*;class revise extends JFrame implements ActionListener JTextField t1,t2,t3,t4,t5; JTable table; JButton but1; JLabel lab1,lab2,lab3,lab4,lab5; JPanel p1; int n=0; revise() super(修改); setBounds(350,100,470,400); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); lab1=new JLabel(学号); t1=new JTextField(10); lab2=new JLabel(姓名); t2=new