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Server.java

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package Net;

import java.io.*;

import java.net.ServerSocket;

import java.net.Socket;

/*

建立TCP服务器端思路：

1创建服务器socket服务，通过Serversocket对象

2服务器端必须对外提供一个端口，否则客户端无法连接

3获取连接过来的客户端对象

4通过客户端对象获取socket流读取客户端发来的数据打印

5关闭资源，关闭流，关闭服务器

* */

public class Server {

public static void main(String[] args) {

//创建ServerSocket类型对象，指定接口

try {

ServerSocket ss=new ServerSocket(1234);

System.out.println("等待客户端连接");

//等待客户端连接，使用accept();

Socket s =ss.accept();//进行阻塞

System.out.println("客户端连接成功");

//使用字符缓冲输入流接受客户消息

BufferedReader br =new BufferedReader(new InputStreamReader(s.getInputStream()));

String str =br.readLine();

System.out.println("客户端发来的消息是"+str);

BufferedWriter bw =new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

bw.write("客户端你好啊");

bw.newLine();

bw.flush();

bw.close();

s.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}