学习通Java作业四

服务器端程序

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;


public class MyServer extends JFrame implements ActionListener {
    JTextArea jta;
    JTextField jtf;
    JButton jb;
    JPanel jp;
    ServerSocket ss;
    Socket socket;
    DataOutputStream out;
    DataInputStream in;

    public MyServer() {
        jta = new JTextArea();
        jtf = new JTextField(15);
        jb = new JButton("发送");
        jp = new JPanel();

        jp.add(jtf);
        jp.add(jb);

        JScrollPane jsp = new JScrollPane(jta);
        this.add(jsp, BorderLayout.CENTER);
        this.add(jp, BorderLayout.SOUTH);

        jb.addActionListener(this);
        jtf.addActionListener(this);

        // 展现
        this.setTitle("服务器");
        this.setSize(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);

        // 开放端口
        try {
            ss = new ServerSocket(9000);
            System.out.println("等待连接");
            socket = ss.accept();
            System.out.println("已连接");

            out = new DataOutputStream(socket.getOutputStream());
            in = new DataInputStream(socket.getInputStream());
            while (true) {
                // 接受客户端发送数据
                String str = in.readUTF();
                // 显示多行文本框中
                jta.append("客户端说：" + str + "\r\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

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

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == jb || e.getSource() == jtf) {
            // 向客户端发送数据
            try {
                out.writeUTF(jtf.getText());
            } catch (IOException e1) {
                e1.printStackTrace();
            }
            // 向多行文本框输入历史聊天记录信息
            jta.append("服务器说：" + jtf.getText() + "\r\n");
            // 清空单行文本框内容
            jtf.setText("");
        }
    }
}

客户端程序

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;

public class MyClient extends JFrame implements ActionListener {
    JButton jb;
    JTextArea jta;
    JTextField jtf;
    JPanel jp;
    Socket socket;
    DataOutputStream out;
    DataInputStream in;

    public MyClient() {
        jta = new JTextArea();
        jtf = new JTextField(15);
        jb = new JButton("发送");
        jp = new JPanel();

        jp.add(jtf);
        jp.add(jb);

        JScrollPane jsp = new JScrollPane(jta);
        this.add(jsp, BorderLayout.CENTER);
        this.add(jp, BorderLayout.SOUTH);

        jb.addActionListener(this);
        jtf.addActionListener(this);

        // 展现
        this.setTitle("客户端");
        this.setSize(300, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);

        try {
            // 建立连接
            socket = new Socket("127.0.0.1", 9000);
            out = new DataOutputStream(socket.getOutputStream());
            in = new DataInputStream(socket.getInputStream());

            while (true) {
                // 接受服务器发送数据
                String str = in.readUTF();
                // 显示在多行文本框
                jta.append("服务器说：" + str + "\r\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

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

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == jb || e.getSource() == jtf) {
            // 向服务器发送数据
            try {
                out.writeUTF(jtf.getText());
            } catch (IOException e1) {
                e1.printStackTrace();
            }
            // 显示在多行文本框
            jta.append("客户端说：" + jtf.getText() + "\r\n");
            // 清空单行文本框
            jtf.setText("");
        }
    }
}