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  • 多线程应用 任务执行 等待所有任务完成一起处理

    首先是执行算法的CALL

    Java代码 复制代码 收藏代码
    1. /**
    2. * <dl>
    3. * <dt><b>类功能概要</b></dt>
    4. * <dd></dd>
    5. * </dl>
    6. * Version        Date       Company   Developer    Revise
    7. * -------     ----------   ---------  ---------    ------
    8. * pisv2.3.2   2012-02-24   yihaodian   xiangqi     create
    9. */ 
    10. package com.yihaodian.pis.thread; 
    11.  
    12. import java.util.concurrent.Callable; 
    13.  
    14. /**
    15. * @author yhd
    16. *
    17. */ 
    18. class Content implements Callable<Integer> { 
    19.  
    20.     publicint data; 
    21.     public Integer call() throws Exception { 
    22.         data ++; 
    23.         //此段可以表示用来执行其他耗时任务 
    24.         Thread.sleep(5000l); 
    25.         return data; 
    26.     } 
    27.     publicint getData() { 
    28.         return data; 
    29.     } 
    30.     publicvoid setData(int data) { 
    31.         this.data = data; 
    32.     } 
    33.      
    34. }  
    /**
 * <dl>
 * <dt><b>类功能概要</b></dt>
 * <dd></dd>
 * </dl>
 * Version     	  Date       Company   Developer    Revise
 * -------     ----------   ---------  ---------    ------
 * pisv2.3.2   2012-02-24   yihaodian   xiangqi     create
 */
package com.yihaodian.pis.thread;

import java.util.concurrent.Callable;

/**
 * @author yhd
 *
 */
class Content implements Callable<Integer> {

	public int data;
	public Integer call() throws Exception {
		data ++;
		//此段可以表示用来执行其他耗时任务
		Thread.sleep(5000l);
		return data;
	}
	public int getData() {
		return data;
	}
	public void setData(int data) {
		this.data = data;
	}
	
}

    其次是执行这个计算的任务线程

    Java代码 复制代码 收藏代码
    1. /**
    2. * <dl>
    3. * <dt><b>类功能概要</b></dt>
    4. * <dd></dd>
    5. * </dl>
    6. * Version        Date       Company   Developer    Revise
    7. * -------     ----------   ---------  ---------    ------
    8. * pisv2.3.2   2012-02-24   yihaodian   xiangqi     create
    9. */ 
    10. package com.yihaodian.pis.thread; 
    11.  
    12. import java.util.List; 
    13. import java.util.concurrent.BlockingQueue; 
    14. import java.util.concurrent.Callable; 
    15. import java.util.concurrent.Future; 
    16. import java.util.concurrent.LinkedBlockingQueue; 
    17. import java.util.concurrent.ThreadPoolExecutor; 
    18. import java.util.concurrent.TimeUnit; 
    19.  
    20. /**
    21. * @author yhd
    22. *
    23. */ 
    24. publicclass TestCall { 
    25.  
    26.     /**
    27.      * <dl>
    28.      * <dt><b>方法功能概要</b></dt>
    29.      * <dd></dd>
    30.      * </dl>
    31.      */ 
    32.     public Future<Integer> excute(Content content) { 
    33.         BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(); 
    34.         ThreadPoolExecutor executor = new ThreadPoolExecutor(50, 100, 1, 
    35.                 TimeUnit.MINUTES, workQueue, 
    36.                 new ThreadPoolExecutor.AbortPolicy()); 
    37.         return executor.submit(content); 
    38.     } 
    39.  
    40. }  
    /**
 * <dl>
 * <dt><b>类功能概要</b></dt>
 * <dd></dd>
 * </dl>
 * Version     	  Date       Company   Developer    Revise
 * -------     ----------   ---------  ---------    ------
 * pisv2.3.2   2012-02-24   yihaodian   xiangqi     create
 */
package com.yihaodian.pis.thread;

import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @author yhd
 *
 */
public class TestCall {

	/**
	 * <dl>
	 * <dt><b>方法功能概要</b></dt>
	 * <dd></dd>
	 * </dl>
	 */
	public Future<Integer> excute(Content content) {
		BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>();
		ThreadPoolExecutor executor = new ThreadPoolExecutor(50, 100, 1,
				TimeUnit.MINUTES, workQueue,
				new ThreadPoolExecutor.AbortPolicy());
		return executor.submit(content);
	}

}

    最后是主类，内部类设定参数，得到计算后的数据

    Java代码 复制代码 收藏代码
    1. /**
    2. * <dl>
    3. * <dt><b>类功能概要</b></dt>
    4. * <dd></dd>
    5. * </dl>
    6. * Version        Date       Company   Developer    Revise
    7. * -------     ----------   ---------  ---------    ------
    8. * pisv2.3.2   2012-02-24   yihaodian   xiangqi     create
    9. */ 
    10. package com.yihaodian.pis.thread; 
    11.  
    12. import java.util.ArrayList; 
    13. import java.util.List; 
    14. import java.util.concurrent.BlockingQueue; 
    15. import java.util.concurrent.ExecutionException; 
    16. import java.util.concurrent.Future; 
    17. import java.util.concurrent.LinkedBlockingQueue; 
    18. import java.util.concurrent.ThreadPoolExecutor; 
    19. import java.util.concurrent.TimeUnit; 
    20.  
    21. /**
    22. * @author yhd
    23. *
    24. */ 
    25. publicclass Test { 
    26.  
    27.     /**
    28.      * <dl>
    29.      * <dt><b>方法功能概要</b></dt>
    30.      * <dd></dd>
    31.      * </dl>
    32.      */ 
    33.     publicstaticvoid main(String[] args) { 
    34.         BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(); 
    35.         ThreadPoolExecutor executor = new ThreadPoolExecutor(50, 100, 1, 
    36.                 TimeUnit.MINUTES, workQueue, 
    37.                 new ThreadPoolExecutor.AbortPolicy()); 
    38.         class MainThread implements Runnable { 
    39.             TestCall testCall = new TestCall(); 
    40.             @Override 
    41.             publicvoid run() { 
    42.                 try { 
    43.                 List<Future<Integer>> tasks = new ArrayList<Future<Integer>>(); 
    44.                 for (int i = 0; i < 1000; i++) { 
    45.                     Content content = new Content(); 
    46.                     content.setData(i); 
    47.                     tasks.add(testCall.excute(content)); 
    48.                      
    49.                 } 
    50.                 //结束循环,开始得到结果 
    51.                 //状态用来标记任务完成的状态 
    52.                 int status = 0; 
    53.                 while (status != 2) { 
    54.                     status = 1; 
    55.                     for(Future<Integer> task : tasks) { 
    56.                         if (!task.isDone()) { 
    57.                             status = 0; 
    58.                             //等待任务都完成 
    59.                             Thread.sleep(1000l); 
    60.                             break; 
    61.                         } 
    62.                         if (status == 1 || status == 2) { 
    63.                             System.out.println(task.get()); 
    64.                             status = 2; 
    65.                         } 
    66.                     } 
    67.                 } 
    68.                 } catch (Exception e) { 
    69.                     // TODO Auto-generated catch block 
    70.                     e.printStackTrace(); 
    71.                 } 
    72.             } 
    73.         } 
    74.         MainThread mainThread = new MainThread(); 
    75.         executor.submit(mainThread); 
    76.     } 
    77.  
    78. }  
    /**
 * <dl>
 * <dt><b>类功能概要</b></dt>
 * <dd></dd>
 * </dl>
 * Version     	  Date       Company   Developer    Revise
 * -------     ----------   ---------  ---------    ------
 * pisv2.3.2   2012-02-24   yihaodian   xiangqi     create
 */
package com.yihaodian.pis.thread;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @author yhd
 * 
 */
public class Test {

	/**
	 * <dl>
	 * <dt><b>方法功能概要</b></dt>
	 * <dd></dd>
	 * </dl>
	 */
	public static void main(String[] args) {
		BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>();
		ThreadPoolExecutor executor = new ThreadPoolExecutor(50, 100, 1,
				TimeUnit.MINUTES, workQueue,
				new ThreadPoolExecutor.AbortPolicy());
		class MainThread implements Runnable {
			TestCall testCall = new TestCall();
			@Override
			public void run() {
				try {
				List<Future<Integer>> tasks = new ArrayList<Future<Integer>>();
				for (int i = 0; i < 1000; i++) {
					Content content = new Content();
					content.setData(i);
					tasks.add(testCall.excute(content));
					
				}
				//结束循环,开始得到结果
				//状态用来标记任务完成的状态
				int status = 0;
				while (status != 2) {
					status = 1;
					for(Future<Integer> task : tasks) {
						if (!task.isDone()) {
							status = 0;
							//等待任务都完成
							Thread.sleep(1000l);
							break;
						}
						if (status == 1 || status == 2) {
							System.out.println(task.get());
							status = 2;
						}
					}
				}
				} catch (Exception e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		MainThread mainThread = new MainThread();
		executor.submit(mainThread);
	}

}

    最后得到的结果就是   你想要的    2
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  • 原文地址：https://www.cnblogs.com/chenzhao/p/2857880.html
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