网络编程-TCP程序实例（client端heserver端相互通信）

package com.yyq;

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


/*
 * 演示tcp的传输的客户端和服务端的互访
 * 需求：客户端给服务端发送数据服务端获取信息后给客户端回送数据
 */
/*
 * 客户端
 *  1.建立socket服务。指定要接收主机和端口
 *  2.获取socket流中的输出流，将数据写入到该六种，通过网络发送到服务器
 *  3.获取socket流中的输入流，将服务端反馈的数据获取到，并打印
 *  4.关闭客户端资源。
 * 
 */
public class TcpClient2 {
    public static void main(String[] args) throws Exception {
        Socket s = new Socket(InetAddress.getLocalHost(),4321);
        OutputStream out = s.getOutputStream();
        out.write("服务端，你好".getBytes());
        InputStream in = s.getInputStream();
        byte[] buf = new byte[1024];
        int len = in.read(buf);
        System.out.println(new String(buf,0,len));
    }
}


package com.yyq;

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

public class TcpServer2 {
    public static void main(String[] args) throws Exception {
        ServerSocket ss = new ServerSocket(4321);
        Socket s = ss.accept();
        InputStream in = s.getInputStream();
        byte[] buf = new byte[1024];
        int len = in.read(buf);
        System.out.println("ip:"+s.getInetAddress().getHostAddress());
        System.out.println(new String(buf,0,len));
        OutputStream out = s.getOutputStream();
        Thread.sleep(10000);
        out.write("你也好".getBytes());
    }
}