java网络编程一

TCP网络编程


1 流程





2 服务端代码：

package cn.jingshan.tcp;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

/**

 * @author yuajings

 * @desc TCP服务端

 */

public class TCPServer {

public static void main(String[] args) throws IOException {
//创建socket监听服务
ServerSocket listen = new ServerSocket(5050);

        //建立连接

        Socket server  = listen.accept();

        

        //通信

        InputStream in = server.getInputStream();

        OutputStream out = server.getOutputStream();

        //接收消息

        char c = (char)in.read();

        System.out.println("收到:" + c);

        //发送消息

        out.write('s');

        

        //关闭连接

        out.close();

        in.close();

        server.close();

        listen.close();
}

}

3 客户端代码：

package cn.jingshan.tcp;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.Socket;

/**

 * @author yuajings

 * @desc TCP客户端

 */

public class TCPClient {

public static void main(String[] args) throws IOException {
//创建Socket
Socket client = new Socket("127.0.0.1", 5050);
//通信

        InputStream in = client.getInputStream();

        OutputStream out = client.getOutputStream();

        //发送消息

        out.write('c');

        //接收消息

        char c = (char)in.read();

        System.out.println("收到:" + c);

        

        //关闭连接

        out.close();

        in.close();

        client.close();
}

}