Java foundation (basis) ----- TCP communication

   1. TCP communication

1.1-one communication

Server

package com.practice;

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

/**
 * 服务端
 * 
 * @author yyx 2019年8月31日
 */
public class TcpServer {
    public static void main(String[] args) {
        Socket socket = null;
        ServerSocket serverSocket = null;
        // 输入流
        InputStream inputStream = null;
        // output stream 
        the OutputStream the outputStream = null ;
         the try { 
            serverSocket = new new the ServerSocket (8888 ); 
            System.out.println ( "connection requests from clients!" ); 
            Socket = serverSocket.accept (); 

            inputStream = Socket.getInputStream ();
             byte [] B = new new  byte [1024 ];
             int len;
             the while (! (len = InputStream.read (B)) = -1 ) { 
                String STR = new new String(b, 0, len);
                System.out.print(str);
            }

            outputStream = socket.getOutputStream();
            outputStream.write("客户端您好，我是服务端".getBytes());

            inputStream.close();
            outputStream.close();
            socket.close();
            serverSocket.close();
        } catch (Exception ex) {

        }
    }
}

Client

package com.practice;

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

/**
 * 客户端
 * 
 * @author yyx 2019年8月31日
 */
public class TcpClient {
    public static void main(String[] args) {
        Socket socket = null;
        InputStream inputStream = null;
        OutputStream outputStream = null;
        try {
            socket = new new the Socket ( "127.0.0.1", 8888 ); 
            outputStream = Socket.getOutputStream (); 
            System.out.println ( "wait for the server to respond" ); 
            OutputStream.write ( "I am a client thanking you in advance" .getBytes ());
             // shutdownOutput (): perform this method, explicitly tell the server sends finished! 
            socket.shutdownOutput (); 

            System.out.println ( "************************************************************" ); 
            inputStream = Socket.getInputStream ();
             byte [] B = new new  byte [1024 ];
             int len;
             the while ((len = inputStream.read(b)) != -1) {
                String str = new String(b, 0, len);
                System.out.print(str);
            }

            inputStream.close();
            outputStream.close();
            socket.close();
        } catch (Exception ex) {
        }
    }
}