本文主要是介绍socket线程池——ExecutorService应用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
socket中的线程池用来处理客户端的多个连接，但超过线程池的容量范围则无能为力。ExecutorService实现多线程socket：
//服务端
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=8823;
private ServerSocket serverSocket;
private ExecutorService executorService ;//线程池
private final int 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();
}
}
}
}
//客户端
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(final int taskID) {
return new Runnable() {
private Socket socket = null;
private int port=8823;
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();
}
}
};
}
}
这篇关于socket线程池——ExecutorService应用的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
