多线程Java Socket编程示例线程池

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多线程Java Socket编程示例线程池

2017年11月08日 ⁄ 综合 ⁄ 共 4022字 ⁄ 字号小中大 ⁄ 评论关闭

//server

package sterning;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.PrintWriter;

import java.net.*;

import java.util.concurrent.*;

public class MultiThreadServer {

private
int port=8821;

private ServerSocket serverSocket;

private ExecutorService executorService;//线程池

private finalint POOL_SIZE=10;//单个CPU线程池大小

public MultiThreadServer()throws IOException{

serverSocket=new ServerSocket(port);

//Runtime的availableProcessor()方法返回当前系统的CPU数目.

executorService=Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()*POOL_SIZE);

System.out.println("服务器启动");

}

public
void service(){

while(true){

Socket socket=null;

try {

//接收客户连接,只要客户进行了连接,就会触发accept();从而建立连接

socket=serverSocket.accept();

executorService.execute(new Handler(socket));

} catch (Exception e) {

e.printStackTrace();

}

public
static void main(String[] args)throws IOException {

new MultiThreadServer().service();

}

class Handler implements Runnable{

private Socket socket;

public Handler(Socket socket){

this.socket=socket;

}

private PrintWriter getWriter(Socket socket)throws IOException{

OutputStream socketOut=socket.getOutputStream();

return new PrintWriter(socketOut,true);

}

private BufferedReader getReader(Socket socket)throws IOException{

InputStream socketIn=socket.getInputStream();

return new BufferedReader(new InputStreamReader(socketIn));

}

public String echo(String msg){

return
"echo:"+msg;

}

public
void run(){

try {

System.out.println("New connection accepted "+socket.getInetAddress()+":"+socket.getPort());

BufferedReader br=getReader(socket);

PrintWriter pw=getWriter(socket);

String msg=null;

while((msg=br.readLine())!=null){

System.out.println(msg);

pw.println(echo(msg));

if(msg.equals("bye"))

break;

}

} catch (IOException e) {

e.printStackTrace();

}finally{

try {

if(socket!=null)

socket.close();

} catch (IOException e) {

e.printStackTrace();

}

//client:

package sterning;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class MultiThreadClient {
public
static void main(String[] args) {
int numTasks =
10;
ExecutorService exec = Executors.newCachedThreadPool();
for (int i =0; i < numTasks; i++) {
exec.execute(createTask(i));
}
}
// 定义一个简单的任务
private
static Runnable createTask(finalint taskID) {
return new Runnable() {
private Socket socket =null;
private int port=8821;
public void run() {
System.out.println("Task " + taskID +":start");
try {
socket = new Socket("localhost", port);
// 发送关闭命令
OutputStream socketOut = socket.getOutputStream();
socketOut.write("shutdown\r\n".getBytes());
// 接收服务器的反馈
BufferedReader br = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
String msg = null;
while ((msg = br.readLine()) !=null)
System.out.println(msg);
} catch (IOException e) {
e.printStackTrace();
}
}
};
}
}

【上篇】tcp连接状态描述
【下篇】Java基于Socket文件传输示例

作者: Dyegially

该日志由 Dyegially 于7年前发表在综合分类下，最后更新于 2017年11月08日.
转载请注明: 多线程Java Socket编程示例线程池 | 学步园 +复制链接

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