Java Executor 多线程框架

相比Thread类，Executor使用更方便，而且支持线程池.内置的不需要第三方的包

常用接口

创建固定书面线程的线程池

public static ExecutorService newFixedThreadPool()

执行一个线程

void java util.concurrent.Executor.execute(Runnable command)

多线程创建连接池

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;

public class ExecutorTest {

	private static Integer pages=1; // 网页数
	
	private static boolean exeFlag=true; // 执行标识
	
	public static void main(String[] args) {
		ExecutorService executorService=Executors.newFixedThreadPool(10); // 创建ExecutorService 连接池默认连接10个
		
		
		while(exeFlag){
			if(pages<=100){
				executorService.execute(new Runnable() { //执行一个线程
					
					@Override
					public void run() {
						// TODO Auto-generated method stub
						System.out.println("执行第"+pages+"线程...");
						pages++;
					}
				});
			}else{
				if(((ThreadPoolExecutor)executorService).getActiveCount()==0){ // 活动线程个数是0
					executorService.shutdown(); // 结束所有线程
					exeFlag=false;
					System.out.println("任务已经完成");
				}
			}
			
			try {
				Thread.sleep(100); // 线程休息0.1秒
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} 
		}
		
	}
}