Java实现在线聊天功能

效果

关键代码

创建Client.java

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * @author Lete
 * @乐特的程序永无BUG
 * @createDate 2020- 07-04 22:13
 *
 * 1. SendThread 发送消息线程
 * 2. RecieveThread 接受消息线程
 */
public class Client {
    public static void main(String[] args) {

        try {
            // 创建8888端口
            Socket s = new Socket("127.0.0.1", 8888);

            // 启动发送消息线程
            new SendThread(s).start();
            // 启动接受消息线程
            new RecieveThread(s).start();

        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

创建Server.java

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * @author Lete
 * @乐特的程序永无BUG
 * @createDate 2020- 07-04 22:13
 *
 * 1. SendThread 发送消息线程
 * 2. RecieveThread 接受消息线程
 */
public class Server {
    public static void main(String[] args) {
        try {

            // 监听8888端口
            ServerSocket ss = new ServerSocket(8888);

            System.out.println("监听在端口号:8888");
            Socket s = ss.accept();

            //启动发送消息线程
            new SendThread(s).start();
            //启动接受消息线程
            new RecieveThread(s).start();

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}

创建RecieveThread.java

import java.io.*;
import java.net.Socket;

/**
 * @author Lete
 * @乐特的程序永无BUG
 * @createDate 2020- 07-04 22:13
 *
 * 1. SendThread 发送消息线程
 * 2. RecieveThread 接受消息线程
 */
public class RecieveThread extends Thread {

    private Socket s;

    public RecieveThread(Socket s) {
        this.s = s;
    }

    public void run() {
        try {

            // 接收对方输入的内容
            InputStream is = s.getInputStream();
            DataInputStream dis = new DataInputStream(is);

            while (true) {
                String msg = dis.readUTF();
                System.out.println(msg);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

创建SendThread.java

import java.io.*;
import java.net.Socket;
import java.util.Scanner;

/**
 * @author Lete
 * @乐特的程序永无BUG
 * @createDate 2020- 07-04 22:13
 *
 * 1. SendThread 发送消息线程
 * 2. RecieveThread 接受消息线程
 */
public class SendThread extends Thread {

    private Socket s;

    public SendThread(Socket s) {
        this.s = s;
    }

    public void run() {
        try {

            // 获取输入的内容
            OutputStream os = s.getOutputStream();
            DataOutputStream dos = new DataOutputStream(os);

            while (true) {
                Scanner sc = new Scanner(System.in);
                String str = sc.next();
                dos.writeUTF(str);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}