Server

package com.itheima.A05TCP_demp1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) throws IOException {
        // TCP协议，接收数据

        // 1， 创建对象ServerSocket
        ServerSocket ss = new ServerSocket(10000);

        // 2. 监听客户端连接
        Socket socket = ss.accept();

        // 3. 从连接通道中获取输入流
        /*InputStream is = socket.getInputStream();
        InputStreamReader isr = new InputStreamReader(is); // 创建转换流 避免中文乱码
        BufferedReader br = new BufferedReader(isr);*/
        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        int b;
        while ((b = br.read()) != -1) {
            System.out.print((char) b);
        }

        // 4. 释放资源
        socket.close();
        ss.close();

    }
}

Client

package com.itheima.A05TCP_demp1;

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

public class Client {
    public static void main(String[] args) throws IOException {
        //TCP协议，发送数据

        //1. 创建Socket对象
        //细节：在创建对象的同时会连接服务器
        // 如果连接不上 代码会报错
        Socket socket = new Socket("127.0.0.1",10000);

        // 2.从连接通道中获取输出流
        OutputStream os = socket.getOutputStream();
        // 写出数据
        os.write("你好你好".getBytes());

        //3. 释放资源
        os.close();
        socket.close();

    }
}