Java网络通信基础编程(必看篇)

Java网络通信基础编程(必看篇)

方式一：同步阻塞方式（BIO）：

服务器端（Server）：

package com.ietree.basicskill.socket.mode1;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

/**

* 服务端

*/

public class Server {

// 端口号

final static int PORT = 8765;

public static void main(String[] args) {

ServerSocket server = null;

try {

server = new ServerSocket(PORT);

System.out.println("Server start......");

// 进行阻塞

Socket socket = server.accept();

// 创建一个程序执行客户端的任务

new Thread(new ServerHandler(socket)).start();

} catch (IOException e) {

e.printStackTrace();

} finally {

if(server != null){

try {

server.close();

} catch (IOException e) {

e.printStackTrace();

}

}

server = null;

}

}

}

采用多线程来处理接收到的请求（ServerHandler）：

package com.ietree.basicskill.socket.mode1;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

public class ServerHandler implements Runnable {

private Socket socket;

public ServerHandler(Socket socket) {

this.socket = socket;

}

@Override

public void run() {

BufferedReader in = null;

PrintWriter out = null;

try {

in = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));

out = new PrintWriter(this.socket.getOutputStream(), true);

String body = null;

while (true) {

body = in.readLine();

if(body == null){

break;

}

System.out.println("Server: " + body);

out.println("服务器端回送响应的数据。");

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if(in != null){

try {

in.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if(out != null){

try {

out.close();

} catch (Exception e) {

e.printStackTrace();

}

}

if(socket != null){

try {

socket.close();

} catch (IOException e) {

e.printStackTrace();

}

}

socket = null;

}

}

}

客户端（Client）:

package com.ietree.basicskill.socket.mode1;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

/**

* 客户端

*/

public class Client {

final static String ADDRESS = "127.0.0.1";

final static int PORT = 8765;

public static void main(String[] args) {

Socket socket = null;

BufferedReader in = null;

PrintWriter out = null;

try {

socket = new Socket(ADDRESS, PORT);

in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

out = new PrintWriter(socket.getOutputStream(), true);

// 向服务器端发送数据

out.println("接收到客户端的请求数据......");

String response = in.readLine();

System.out.println("Client: " + response);

} catch (Exception e) {

e.printStackTrace();

} finally {

if(in != null){

try {

in.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if(out != null){

try {

out.close();

} catch (Exception e) {

e.printStackTrace();

}

}

if(socket != null){

try {

socket.close();

} catch (IOException e) {

e.printStackTrace();

}

}

socket = null;

}

}

}

程序输出：

Server：

Server start......

Server: 接收到客户端的请求数据......

Client：

Client: 服务器端回送响应的数据。

同步非阻塞（NIO）

异步非阻塞（AIO）

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