基于java设计一个学生成绩管理系统，要求有界面，且有增加，查询，修改，删除，退出功能，代码如何写？

import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.SQLException;

import javax.swing.JButton;

public class Stmessege {
Font font = new Font("楷体", Font.BOLD, 18);
private Frame m = new Frame("登陆成功界面");
protected Window f;

public Stmessege() {

m.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
m.setVisible(false);
m.dispose();
System.exit(0);
}
});
m.setSize(460, 360);
m.setBackground(Color.green);
m.setLayout(null);
m.setLocationRelativeTo(null);

Label l0 = new Label("管理员信息");
Font font1 = new Font("楷体", Font.BOLD, 32);
l0.setForeground(Color.blue);
l0.setSize(180, 50);
l0.setLocation(150, 30);
l0.setFont(font1);

final Label l1 = new Label("姓名：");
l1.setSize(60, 20);
l1.setLocation(10, 100);
l1.setFont(font);

TextField tf1 = new TextField("黄朋");
tf1.setForeground(Color.blue);
tf1.setBackground(Color.white);
tf1.setSize(50, 20);
tf1.setLocation(70, 100);

final Label l2 = new Label("学号：");
l2.setSize(60, 20);
l2.setLocation(140, 100);
l2.setFont(font);

TextField tf2 = new TextField("111265");
tf2.setForeground(Color.blue);
tf2.setBackground(Color.white);
tf2.setSize(60, 20);
tf2.setLocation(190, 100);

final Label l3 = new Label("性别：");
l3.setSize(60, 20);
l3.setLocation(280, 100);
l3.setFont(font);

TextField tf3 = new TextField("男");
tf3.setForeground(Color.blue);
tf3.setBackground(Color.white);
tf3.setSize(40, 20);
tf3.setLocation(360, 100);

final Label l4 = new Label("班级：");
l4.setSize(60, 20);
l4.setLocation(10, 170);
l4.setFont(font);

TextField tf4 = new TextField("611231");
tf4.setForeground(Color.blue);
tf4.setBackground(Color.white);
tf4.setSize(60, 20);
tf4.setLocation(67, 170);

final Label l5 = new Label("系别：");
l5.setSize(60, 20);
l5.setLocation(140, 170);
l5.setFont(font);

TextField tf5 = new TextField("计算机工程系");
tf5.setForeground(Color.blue);
tf5.setBackground(Color.white);
tf5.setSize(80, 20);
tf5.setLocation(200, 170);

final Label l6 = new Label("成绩：");
l6.setSize(60, 20);
l6.setLocation(280, 170);
l6.setFont(font);

TextField tf6 = new TextField("95");
tf6.setForeground(Color.blue);
tf6.setBackground(Color.white);
tf6.setSize(40, 20);
tf6.setLocation(360, 170);

final Label l7 = new Label("专业：");
l7.setSize(60, 20);
l7.setLocation(10, 230);
l7.setFont(font);

TextField tf7 = new TextField("软件技术");
tf7.setForeground(Color.blue);
tf7.setBackground(Color.white);
tf7.setSize(60, 20);
tf7.setLocation(70, 230);

JButton btn1 = new JButton("添加");
btn1.setForeground(Color.blue);
btn1.setSize(80, 38);
btn1.setLocation(35, 300);
btn1.setFont(font);
btn1.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
new 插入();
m.setVisible(true);
}
});
JButton btn2 = new JButton("查询学生学籍信息");
btn2.setForeground(Color.blue);
btn2.setSize(200, 38);
btn2.setLocation(135, 300);
btn2.setFont(font);

btn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Stmessege1 f;
try {
f = new Stmessege1();
f.Stmessege11();
m.setVisible(true);

} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});

JButton btn3 = new JButton("删除");
btn3.setForeground(Color.blue);
btn3.setSize(80, 38);
btn3.setLocation(350, 300);
btn3.setFont(font);
btn3.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

new 删除();
//f.setVisible(false);
m.setVisible(true);
}
});

JButton btn4 = new JButton("更新");
btn4.setForeground(Color.blue);
btn4.setSize(80, 38);
btn4.setLocation(200, 230);
btn4.setFont(font);
btn4.addActionListener(new ActionListener() {

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
new 更新();
m.setVisible(true);

}
});

m.add(l0);
m.add(l1);

m.add(tf1);
m.add(l2);

m.add(tf2);
m.add(l3);

m.add(tf3);
m.add(l4);

m.add(tf4);
m.add(l5);

m.add(tf5);
m.add(l6);
m.add(tf6);

m.add(l7);
m.add(tf7);

m.add(btn1);
m.add(btn2);
m.add(btn3);
m.add(btn4);

m.setVisible(true);

}

public static void main(String[] args) {
new Stmessege();
}
}

可以仿照我的做一下，希望采纳，我才一级哦本回答被提问者采纳