JavaSocket编程系列（一）开发一次性会话的Server和Client

关于什么是Socket&＃xff1a;

A socket is one end-point of a two-way communication link between two programs running on the network.

Socket是网络上运行的2个程序之间通信链接的终点。说白了就是代表一条通信链路的两端。

Socket classes are used to represent the connection between a client program and a server program.

Socket类用来代表客户端程序和服务器端程序的连接。

The java.net package provides two classes--Socket and ServerSocket--that implement the client side of the connection and the server side of the connection, respectively

Java中如何编写&＃xff1f;

服务器端&＃xff1a;

package com.dylan.socket;import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;/*** 服务器** &＃64;author xusucheng* &＃64;create 2017-12-21**/
public class Server {public static final int PORT &＃61; 8858;//监听的端口号public static void main(String[] args) throws Exception {System.out.println("Server started! Listening...");ServerSocket serverSocket &＃61; new ServerSocket(PORT);Socket server &＃61; serverSocket.accept();BufferedReader in &＃61; new BufferedReader(new InputStreamReader(server.getInputStream()));PrintWriter out &＃61; new PrintWriter(server.getOutputStream());String readLine &＃61; in.readLine();if (readLine !&＃61; null) {System.out.println("Receive message from Client: " &＃43; readLine);out.println("Roger!");}out.close();in.close();server.close();serverSocket.close();}}


客户端&＃xff1a;

package com.dylan.socket;import java.io.*;
import java.net.Socket;/*** 客户端** &＃64;author xusucheng* &＃64;create 2017-12-20**/
public class Client {public static final String HOST &＃61; "127.0.0.1";//服务器地址public static final int PORT &＃61; 8858;//服务器端口号public static void main(String[] args) throws Exception{Socket client &＃61; new Socket(HOST,PORT);//创建输入流BufferedReader in &＃61; new BufferedReader(new InputStreamReader(client.getInputStream()));//创建输出流PrintWriter out &＃61; new PrintWriter(client.getOutputStream(),true);//向服务器程序发送信息out.println("Hello Server! This is Client! ");//接收来自服务器程序的响应String readLine&＃61;in.readLine();if(readLine!&＃61;null){System.out.println("Receive message from Server: "&＃43;readLine);}//关闭链接out.close();in.close();client.close();}
}



启动

服务器端

Server started! Listening...

Receive message from Client: Hello Server! This is Client!

客户端&＃xff1a;

Receive message from Server: Roger!