线程池 Executors2

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;



public class UseThreadPoolExecutor1 {


	public static void main(String[] args) {
		/**
		 * 在使用有界队列时，若有新的任务需要执行，如果线程池实际线程数小于corePoolSize，则优先创建线程，
		 * 若大于corePoolSize，则会将任务加入队列，
		 * 若队列已满，则在总线程数不大于maximumPoolSize的前提下，创建新的线程，
		 * 若线程数大于maximumPoolSize，则执行拒绝策略。或其他自定义方式。
		 * 
		 */	
		ThreadPoolExecutor pool = new ThreadPoolExecutor(
				1, 				//coreSize
				2, 				//MaxSize
				60, 			//60
				TimeUnit.SECONDS, 
				new ArrayBlockingQueue<Runnable>(3)			//指定一种队列 （有界队列）
				//new LinkedBlockingQueue<Runnable>()
				, new MyRejected()
//				, new DiscardOldestPolicy()
				);
		
		MyTask mt1 = new MyTask(1, "任务1");
		MyTask mt2 = new MyTask(2, "任务2");
		MyTask mt3 = new MyTask(3, "任务3");
		MyTask mt4 = new MyTask(4, "任务4");
		MyTask mt5 = new MyTask(5, "任务5");
		MyTask mt6 = new MyTask(6, "任务6");
		
		pool.execute(mt1);
		pool.execute(mt2);
		pool.execute(mt3);
		pool.execute(mt4);
		pool.execute(mt5);
		pool.execute(mt6);
		
		pool.shutdown();
		
	}
}

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

public class UseThreadPoolExecutor2 implements Runnable{

	private static AtomicInteger count = new AtomicInteger(0);
	
	@Override
	public void run() {
		try {
			int temp = count.incrementAndGet();
			System.out.println("任务" + temp);
			Thread.sleep(2000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args) throws Exception{
		//System.out.println(Runtime.getRuntime().availableProcessors());
		BlockingQueue<Runnable> queue = 
//				new LinkedBlockingQueue<Runnable>();
				new ArrayBlockingQueue<Runnable>(10);
		ExecutorService executor  = new ThreadPoolExecutor(
					5, 		//core
					10, 	//max
					120L, 	//2fenzhong
					TimeUnit.SECONDS,
					queue);
		
		for(int i = 0 ; i < 20; i++){
			executor.execute(new UseThreadPoolExecutor2());
		}
		Thread.sleep(1000);
		System.out.println("queue size:" + queue.size());		//10
		Thread.sleep(2000);
	}


}

public class MyTask implements Runnable {

	private int taskId;
	private String taskName;
	
	public MyTask(int taskId, String taskName){
		this.taskId = taskId;
		this.taskName = taskName;
	}
	
	public int getTaskId() {
		return taskId;
	}

	public void setTaskId(int taskId) {
		this.taskId = taskId;
	}

	public String getTaskName() {
		return taskName;
	}

	public void setTaskName(String taskName) {
		this.taskName = taskName;
	}

	@Override
	public void run() {
		try {
			System.out.println("run taskId =" + this.taskId);
			Thread.sleep(5*1000);
			//System.out.println("end taskId =" + this.taskId);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}		
	}
	
	public String toString(){
		return Integer.toString(this.taskId);
	}

}

import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;

public class MyRejected implements RejectedExecutionHandler{

	
	public MyRejected(){
	}
	
	@Override
	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
		System.out.println("自定义处理..");
		System.out.println("当前被拒绝任务为：" + r.toString());
		

	}

}