java学生成绩管理系统代码

JAVA 学生成绩管理系统代码import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; import javax.swing.*; import java.awt.*;import java.awt.event.*; import java.awt.event.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; import javax.swing.table.JTableHeader; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; import javax.swing.table.DefaultTableModel; import javax.swing.table.JTableHeader; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; class AddForm extends JFrame implements ActionListener{ JLabel labName=new JLabel("学号:"); JLabel labDate=new JLabel("出生日期:"); JLabel labScore=new JLabel("成绩:"); JTextField txtName=new JTextField(20); JTextField txtDate=new JTextField(18); JTextField txtScore=new JTextField(20); JButton btnOk=new JButton("确定"); JButton btnClear=new JButton("清空"); JPanel pan=new JPanel(); JPanel pan1=new JPanel(); JPanel pan2=new JPanel(); JPanel pan3=new JPanel(); JPanel pan4=new JPanel(); Connection cnn; Statement stm; ResultSet rs; AddForm(){ super("添加数据"); setSize(400,300); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); pan.setBorder(BorderFactory.createEtchedBorder()); pan1.add(labName); pan1.add(txtName); pan2.add(labDate); pan2.add(txtDate); pan3.add(labScore); pan3.add(txtScore); pan4.add(btnOk); pan4.add(btnClear); pan.setLayout(new GridLayout(3,1)); pan.add(pan1); pan.add(pan2); pan.add(pan3); getContentPane().add(pan,"Center"); getContentPane().add(pan4,"South"); btnOk.addActionListener(this); bt...