文件addmessage.java代碼：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 p1; addmessage() super("增加"); setBounds(350,100,470,400); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); lab1=new JLabel("學號"); t1=new JTextField(10); lab2=new JLabel("姓名"); t2=new JTextField(10); lab3=new JLabel("課程名"); t3=new JTextField(10); lab4=new JLabel("狀態(tài)"); t4=new JTextField(10); lab5=new JLabel("成績"); 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 i=0 ; String sql1=null,sql2=null,update=null;String url="jdbc:mysql:/localhost:3306/學生成績系統(tǒng)" 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- try con=DriverManager.getConnection(url,"root","123"); stmt=con.createStatement(); sql1="INSERT INTO 學生成績表 VALUES ("+t1.getText()+","+t2.getText()+","+t3.getText()+","+t4.getText()+","+t5.getText()+")" String num1=t1.getText(); String num2=t1.getText(); String sele="select * from 學生成績表 where 學號="+num1+" and 課程名="+num2+"" ResultSet rs=stmt.executeQuery(sele); if(rs.next() JOptionPane.showMessageDialog(this, "已有該條記錄，請核實！"); 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) System.err.println("SQLException:"+ex.getMessage(); 文件deletemessage.java代碼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 but1; JLabel lab1,lab2,lab3; JPanel p1; deletemessage() super("刪除"); setBounds(350,100,470,400); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); lab1=new JLabel("學號"); t1=new JTextField(10); lab2=new JLabel("姓名"); t2=new JTextField(10); lab3=new JLabel("課程名"); t3=new JTextField(10); but1=new JButton("刪除"); 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/學生成績系統(tǒng)" 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) /刪除- try String num1=t1.getText(); String num2=t2.getText(); String num3=t3.getText(); sql2="delete from 學生成績表 where 學號="+num1+"and 課程名="+num3+"" con=DriverManager.getConnection(url,"root","123"); stmt=con.createStatement(); sql1="select * from 學生成績表 where 學號="+num1+" and 姓名="+num2+" and 課程名="+num3+"" ResultSet rs=stmt.executeQuery(sql1); if(rs.next() stmt.executeUpdate(sql2); JOptionPane.showMessageDialog(this, "刪除成功!"); else JOptionPane.showMessageDialog(this, "沒有此條記錄!請重新輸入"); t1.setText(""); stmt.close(); con.close(); catch(SQLException ex) System.err.println("SQLException:"+ex.getMessage(); 文件entry.java代碼import java.awt.*;import java.awt.event.*;import java.sql.*;import javax.swing.*;class entry extends JFrame implements ActionListener int flag=1; String user,pass; JPanel pa; JLabel lab1,lab2; JTextField tf1; JPasswordField tf2; JButton btu1,btu2; JPanel pa1,pa2,pa4; entry()super("學生成績管理系統(tǒng)");setBounds(400,200,400,300);GridBagLayout gbL=new GridBagLayout(); GridBagConstraints gbc=new GridBagConstraints(); setLayout(gbL); gbc.fill=GridBagConstraints.HORIZONTAL;gbc.anchor=GridBagConstraints.CENTER; lab1=new JLabel("請輸入帳號");lab2=new JLabel("請輸入密碼"); 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(2,5,0,5);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("確定");btu1.addActionListener(this);btu2=new JButton("退出");btu2.addActionListener(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);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,ClassNotFoundExceptionString driver ="org.gjt.mm.mysql.Driver" Class.forName(driver); String URL = "jdbc:mysql:/localhost:3306/學生成績系統(tǒng)" Connection conn = DriverManager.getConnection(URL,"root","123"); Statement stmt=conn.createStatement(); ResultSet rs = stmt.executeQuery("select * from 用戶管理表"); while (rs.next() name=rs.getString("用戶名").trim(); pwd=rs.getString("密碼").trim(); ustype=rs.getString("權限組").trim(); if (s.equals(name)&&a.equals(pwd) i=1; if(ustype.trim().equals("管理員") teacher tea=new teacher(); tea.setVisible(true); if(ustype.trim().equals("學生") student stu=new student(name); stu.setVisible(true); if(i=0) JOptionPane.showMessageDialog(null, "用戶名或者密碼錯誤", "警告",JOptionPane.WARNING_MESSAGE); stmt.close();conn.close(); 文件inquiry.java代碼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 ActionListener JTextField t1; JTable table; JButton but1; JLabel lab1; JPanel p1; JTable table1=null; DefaultTableModel demod1=null; String n="課程名","狀態(tài)","成績" String data=new String00; String No; inquiry(String no) super("成績"); No=no; setBounds(350,100,470,400); p1=new JPanel(); lab1=new JLabel("課程名"); t1=new JTextField(10); but1=new JButton("查詢成績"); 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; String sql1;String url="jdbc:mysql:/localhost:3306/學生成績系統(tǒng)" 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 * from 學生成績表 where 學號="+No+"" if(!num.equals("") sql1="select * from 學生成績表 where 課程名="+num+"and 學號="+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); data.addElement(rs.getString(4); data.addElement(rs.getString(5); demod1.addRow(data); i=1; if(i=0) JOptionPane.showMessageDialog(this, "沒有此課程!請重新輸入"); table1.revalidate(); t1.setText(""); stmt.close(); con.close(); catch(SQLException ex) System.err.println("SQLException:"+ex.getMessage(); public void removeAllRecord()/將界面上的所有記錄清空 int rowcount; while(true)/刪除所有存在的行rowcount = demod1.getRowCount()-1; if(rowcount >= 0) demod1.removeRow(rowcount); demod1.setRowCount(rowcount); else break; 文件main.java代碼import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;public class main public static void main(String args)entry ent=new entry();ent.setVisible(true); ent.setResizable(false); 文件record.java代碼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 ActionListener JTextField t1; TextArea t; JButton but1; JLabel L1; JPanel p1; JTable table1=null; DefaultTableModel demod1=null; String n="平均成績","優(yōu)秀","良好","不及格" String data=new String00; public record() super("統(tǒng)計"); setBounds(350,30,470,610); setLayout(new GridLayout(1,1,10,10); p1=new JPanel(); L1=new JLabel("課程名"); but1=new JButton("查詢"); 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(ActionEvent e) int i=0; String sql1; String sql2;String url="jdbc:mysql:/localhost:3306/學生成績系統(tǒng)" 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 num1=t1.getText(); if(num1.equals("") JOptionPane.showMessageDialog(this, "學號不能為空","請輸入學號！",JOptionPane.WARNING_MESSAGE); else sql1="select * from 學生成績表 where 學號="+num1+"" sql1="select avg(成績) from 學生成績表 where 課程名="+num1+"" sql2="select count(*) from 學生成績表 where 課程名="+num1+" and 成績>=90" 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.getInt(1); /*data.addElement(rs.getString(3); data.addElement(rs.getString(4); data.addElement(rs.getString(5);*/ demod1.addRow(data); i=1; rs=stmt.executeQuery(sql2); while(rs.next() int n = rs.getInt(1); System.out.println(n); if(i=0) JOptionPane.showMessageDialog(this, "沒有此條記錄!請重新輸入"); table1.revalidate(); t1.setText(""); stmt.close(); con.close(); catch(SQLException ex) System.err.println("SQLException:"+ex.getMessage(); public void removeAllRecord()/將界面上的所有記錄清空 int rowcount; while(true)/刪除所有存在的行rowcount = demod1.getRowCount()-1; if(rowcount >= 0) demod1.removeRow(rowcount); demod1.setRowCount(rowcount); else break; 文件revise.java代碼import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;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("學號"); t1=new JTextField(10); lab2=new JLabel("姓名"); t2=new JTextField(10); lab3=new JLabel("課程名"); t3=new JTextField(10); lab4=new JLabel("狀態(tài)"); t4=new JTextField(10); lab5=new JLabel("成績"); t5=new JTextField(10); but1=new JButton("修改"); 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) String sql1=null,update=null;String url="jdbc:mysql:/localhost:3306/學生成績系統(tǒng)" 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) /修改- try String num1=t3.getText(); String num2=t1.getText(); /String num3=t5.getText(); n= Integer.valueOf(t5.getText().intValue(); System.out.print(n); con=DriverManager.getConnection(url,"root","123"); stmt=con.createStatement(); sql1="select * from 學生成績表 where 學號="+num2+" and 課程名="+num1+"" update="update 學生成績表 set 課程名="+t3.getText()+",狀態(tài)="+t4.getText()+",成績 ="+n+" where 學號="+num2+"" ResultSet rs=stmt.executeQuery(sql1); if(rs.next() stmt.executeUpdate(update); JOptionPane.showMessageDialog(this, "修改成功!"); else JOptionPane.showMessageDialog(this, "沒有此條記錄!請重新輸入"); t1.setText(""); t2.setText(""); t3.setText(""); t4.setText(""); t5.setText(""); stmt.close(); con.close(); catch(SQLException ex) System.err.println("SQLException:"+ex.getMessage(); 文件student.java代碼import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;class student extends JFrame implements ActionListener inquiry cho; JMenuBar mb; JMenu m1; JMenuItem mt1,mt2; String No; Icon icon; JLabel lab; student(String no)super("學生");icon=new ImageIcon("123.jpg"); lab=new JLabel(icon); add(lab);No=no; setBounds(130,10,800,500); JMenuBar mb=new JMenuBar(); setJMenuBar(mb); m1=new JMenu("操作"); mt1=new JMenuItem("查詢成績"); mt2=new JMenuItem("退出"); m1.add(mt1); mt1.addActionListener(this); m1.addSeparator(); m1.add(mt2); mt2.addActionListener(this); m1.addActionListener(this); mb.add(m1); public void actionPerformed(ActionEvent e) if(e.getSource()=mt1) cho=new inquiry(No); if(e.getSource()=mt2) dispose(); 文件teacher.java代碼import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;class teacher extends JFrame implements ActionListener addmessage add; deletemessage delete; revise re; user use; record rec; MenuBar mb; Menu m1; MenuItem mt1,mt2,mt3,mt4,mt5,mt6; Icon icon; JLabel lab; teacher() super("管理員"); setBounds(130,10,800,500); MenuBar mb=new MenuBar(); setMenuBar(mb); m1=new Menu("操作"); mt1=new MenuItem("增加"); mt2=new MenuItem("刪除"); mt3=new MenuItem("修改"); mt4=new MenuItem("查詢"); mt5=new MenuItem("統(tǒng)計"); mt6 = new MenuItem("退出"); icon=new ImageIcon("123.jpg"); lab=new JLabel(icon); add(lab); mt1.addActionListener(this); m1.add(mt1); mt2.addActionListener(this); m1.add(mt2); mt3.addActionListener(this); m1.add(mt3); mt4.addActionListener(this); m1.add(mt4); mt5.addActionListener(this); m1.add(mt5); m1.addSeparator(); mt6.addActionListener(this); m1.add(mt6); m1.addActionListener(this); mb.add(m1); public void actionPerformed(ActionEvent e) if(e.getSource()=mt1) add=new addmessage(); if(e.getSource()=mt2) delete=new deletemessage(); if(e.getSource()=mt3) re=new revise(); if(e.getSource()=mt4) use=new user(); if(e.getSource()=mt5) rec=new record(); if(e.getSource()=mt6) dispose(); 文件user.java代碼import java.awt.*;import java.awt.event.*;import java.sql.*;import java.util.*;import javax.swing.*;import javax.swing.table.*;class user extends JFrame implements ActionListener