Java课程设计（网络编程/GUI/JDBC）：学生成绩管理系统-代码

import java.io.*; import java.net.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; public class Client { // C/S模式 private Socket socket; private DataInputStream dis; private DataOutputStream dos; // GUI组件 private JFrame frame; private JPanel panelHead, panelLeft, panelRight,panelCenter; private JLabel labelTitle,labelBody,labelSearchId,labelSearchName,labelName,labelId,labelChinese,labelMath,labelEnglish ; private JTextField inputFieldSearchId, inputFieldSearchName, inputFieldName, inputFieldId,inputFieldChinese,inputFieldMath,inputFieldEnglish; private JButton buttonSearchId, buttonSearchName, buttonAver, buttonMax, buttonMin, buttonAll,buttonAdd,buttonRevise; public Client() throws IOException { // 初始化C/S socket = new Socket("localhost", 4852); dis = new DataInputStream(socket.getInputStream()); dos = new DataOutputStream(socket.getOutputStream()); // 初始化GUI frame = new JFrame("超级管理员"); frame.setSize(800, 500); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // frame.pack(); frame.setVisible(true); GridBagConstraints constraints = new GridBagConstraints(); labelTitle = new JLabel("欢迎使用学生成绩管理系统"); labelTitle.setFont(new Font("楷体", Font.BOLD, 24)); labelTitle.setHorizontalAlignment(JLabel.CENTER); panelHead = new JPanel(new GridBagLayout()); panelHead.setPreferredSize(new Dimension(800, 100)); constraints.gridx = 0; constraints.gridy = 0; constraints.anchor = GridBagConstraints.CENTER; panelHead.add(labelTitle,constraints); frame.getContentPane().add(BorderLayout.NORTH, panelHead); labelSearchId = new JLabel("按照学号查找:"); inputFieldSearchId = new JTextField(10); buttonSearchId = new JButton("确认"); labelSearchName = new JLabel("按照姓名查找:"); inputFieldSearchName = new JTextField(10); buttonSearchName = new JButton("确认"); buttonAver = new JButton("平均分"); buttonMax = new JButton("最高分"); buttonMin = new JButton("最低分"); buttonAll = new JButton("所有成绩"); panelLeft = new JPanel(new GridBagLayout()); // panelLeft.setPreferredSize(new Dimension(500, 700)); constraints.gridx = 0; constraints.gridy = 0; constraints.anchor = GridBagConstraints.CENTER; panelLeft.add(labelSearchId,constraints); constraints.gridx = 2; constraints.gridy = 0; panelLeft.add(inputFieldSearchId,constraints); constraints.gridx = 4; constraints.gridy = 0; panelLeft.add(buttonSearchId,constraints); constraints.gridx = 0; constraints.gridy = 2; panelLeft.add(labelSearchName,constraints); constraints.gridx = 2; constraints.gridy = 2; panelLeft.add(inputFieldSearchName,constraints); constraints.gridx = 4; constraints.gridy = 2; panelLeft.add(buttonSearchName,constraints); constraints.gridx = 0; constraints.gridy = 4; panelLeft.add(buttonAver,constraints); constraints.gridx = 2; constraints.gridy = 4; panelLeft.add(buttonMax,constraints); constraints.gridx = 4; constraints.gridy = 4; panelLeft.add(buttonMin,constraints); constraints.gridx = 2; constraints.gridy = 6; panelLeft.add(buttonAll,constraints); frame.getContentPane().add(BorderLayout.WEST, panelLeft); buttonSearchId.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 处理按学号查询的逻辑 // 获取输入的学号 String Id = inputFieldSearchId.getText(); // 检查输入是否为空 if (Id == null || Id.trim().isEmpty()) { JOptionPane.showMessageDialog(frame, "请输入有效的学号！"); return; } try { // 发送学号到服务器进行查询 sendNumberToServer("1 "+Id+" 0 0 0 0"); // 从服务器获取查询结果 DataInputStream dataInputStream = getDataInputStream(); String result = dataInputStream.readUTF(); // 显示查询结果 labelBody.setText(result); } catch (IOException ex) { JOptionPane.showMessageDialog(frame, "查询失败，请检查网络连接或服务器状态！"); ex.printStackTrace(); } } }); buttonSearchName.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 处理按姓名查询的逻辑 // 获取输入的姓名 String name = inputFieldSearchName.getText(); // 检查输入是否为空 if (name == null || name.trim().isEmpty()) { JOptionPane.showMessageDialog(frame, "请输入有效的姓名！"); return; } try { // 发送姓名到服务器进行查询 sendNumberToServer("2 " + name + " 0 0 0 0"); // 从服务器获取查询结果 DataInputStream dataInputStream = getDataInputStream(); String result = dataInputStream.readUTF(); // 显示查询结果 labelBody.setText(result); } catch (IOException ex) { JOptionPane.showMessageDialog(frame, "查询失败，请检查网络连接或服务器状态！"); ex.printStackTrace(); } } }); buttonAver.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 处理各科平均分的逻辑 try { // 发送平均分请求到服务器 sendNumberToServer("3 0 0 0 0 0"); // 从服务器获取平均分结果 DataInputStream dataInputStream = getDataInputStream(); String result = dataInputStream.readUTF(); // 显示平均分结果 labelBody.setText(result); } catch (IOException ex) { JOptionPane.showMessageDialog(frame, "查询失败，请检查网络连接或服务器状态！"); ex.printStackTrace(); } } }); buttonMax.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // 处理各科最高分的逻辑 try { // 发送最高分请求到服务器 sendNumberToServer("4 0 0 0 0 0"); // 从服务器获取最高分结果 DataInputStream dataInputStream = getDataInputStream(); String result = dataInputStream.readUTF(); // 显示最高分结果 labelBody.setText(result); } catch (IOException ex) { JOptionPane.showMessageDialog(frame, "查询失败，请检查网络连接或服务器状态！"); ex.printStackTrace(); }