Javaswing学生信息管理系统

以下是一个简单的Java Swing学生信息管理系统的示例代码，包括添加、删除、修改和查询学生信息的功能：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class StudentInfoManagementSystem extends JFrame implements ActionListener {
    private JPanel panel1;
    private JPanel panel2;
    private JPanel panel3;
    private JLabel label1;
    private JLabel label2;
    private JLabel label3;
    private JLabel label4;
    private JTextField textField1;
    private JTextField textField2;
    private JTextField textField3;
    private JTextField textField4;
    private JButton addButton;
    private JButton deleteButton;
    private JButton modifyButton;
    private JButton queryButton;
    private JTable table;
    private DefaultTableModel model;
    private JScrollPane scrollPane;

    public StudentInfoManagementSystem() {
        super("学生信息管理系统");
        this.setSize(500, 500);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLayout(new BorderLayout());

        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();

        label1 = new JLabel("学号:");
        label2 = new JLabel("姓名:");
        label3 = new JLabel("性别:");
        label4 = new JLabel("年龄:");

        textField1 = new JTextField(10);
        textField2 = new JTextField(10);
        textField3 = new JTextField(10);
        textField4 = new JTextField(10);

        addButton = new JButton("添加");
        deleteButton = new JButton("删除");
        modifyButton = new JButton("修改");
        queryButton = new JButton("查询");

        addButton.addActionListener(this);
        deleteButton.addActionListener(this);
        modifyButton.addActionListener(this);
        queryButton.addActionListener(this);

        panel1.setLayout(new GridLayout(4, 2));
        panel1.add(label1);
        panel1.add(textField1);
        panel1.add(label2);
        panel1.add(textField2);
        panel1.add(label3);
        panel1.add(textField3);
        panel1.add(label4);
        panel1.add(textField4);

        panel2.add(addButton);
        panel2.add(deleteButton);
        panel2.add(modifyButton);
        panel2.add(queryButton);

        model = new DefaultTableModel();
        model.addColumn("学号");
        model.addColumn("姓名");
        model.addColumn("性别");
        model.addColumn("年龄");

        table = new JTable(model);
        scrollPane = new JScrollPane(table);
        scrollPane.setPreferredSize(new Dimension(450, 300));

        panel3.add(scrollPane);

        this.add(panel1, BorderLayout.NORTH);
        this.add(panel2, BorderLayout.CENTER);
        this.add(panel3, BorderLayout.SOUTH);

        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == addButton) {
            String[] data = new String[4];
            data[0] = textField1.getText();
            data[1] = textField2.getText();
            data[2] = textField3.getText();
            data[3] = textField4.getText();
            model.addRow(data);
        } else if (e.getSource() == deleteButton) {
            int row = table.getSelectedRow();
            if (row != -1) {
                model.removeRow(row);
            }
        } else if (e.getSource() == modifyButton) {
            int row = table.getSelectedRow();
            if (row != -1) {
                model.setValueAt(textField1.getText(), row, 0);
                model.setValueAt(textField2.getText(), row, 1);
                model.setValueAt(textField3.getText(), row, 2);
                model.setValueAt(textField4.getText(), row, 3);
            }
        } else if (e.getSource() == queryButton) {
            String id = textField1.getText();
            for (int i = 0; i < model.getRowCount(); i++) {
                if (model.getValueAt(i, 0).equals(id)) {
                    table.setRowSelectionInterval(i, i);
                    return;
                }
            }
            JOptionPane.showMessageDialog(null, "没有找到该学生！");
        }
    }

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

这个程序使用了JPanel、JLabel、JTextField、JButton、JTable和JScrollPane等Swing组件。用户可以在文本框中输入学生信息，然后点击相应的按钮来执行添加、删除、修改或查询操作。学生信息以表格的形式展示在程序的下方。