java 实现socket 客户端 服务端

1. Socket服务端

package com.cloud.common.util;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

/**
 * @author rocky.maple
 * @date 2021/7/15 9:57 上午
 */
public class SocketServer {
          
   

    public static void main(String[] args) {
          
   
        try {
          
   
            // 初始化服务端socket并且绑定9999端口
            ServerSocket serverSocket = new ServerSocket(9999);
            //等待客户端的连接
            System.out.println("等待连接");
            Socket socket = serverSocket.accept();
            System.out.println("有socket连接");
            BufferedWriter bufferedWriter =new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            //通过标准输入流获取字符流
            BufferedReader bufferedReader =new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
            while (true){
          
   
                String str = bufferedReader.readLine();
                bufferedWriter.write(str);
                bufferedWriter.write("
");
                bufferedWriter.flush();
            }
        } catch (IOException e) {
          
   
            e.printStackTrace();
        }
    }
}

2. Socket客户端

package com.integration.controller.task.code;

import org.junit.Test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

/**
 * @author rocky.maple
 * @date 2021/7/15 11:44 上午
 */
public class SocketClient {
          
   
    @Test
    public void run() {
          
   
        try (//初始化一个socket
             Socket socket = new Socket("127.0.0.1", 9999);
             //通过标准输入流获取字符流
             BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8))) {
          
   
            while (true) {
          
   
                String str = bufferedReader.readLine();
                System.out.println("获取的数据为：" + str);
            }
        } catch (IOException e) {
          
   
            e.printStackTrace();
        }
    }
}

3. 执行结果 服务端输入： 客户端收到消息：
4. 注意：实际使用中别忘记了关流