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();
}


}