Future异步多线程加同步锁

最新推荐文章于 2025-06-26 09:18:20 发布

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最新推荐文章于 2025-06-26 09:18:20 发布

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分类专栏：编程技术

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本文通过Java代码示例介绍了一个使用ExecutorService进行并发任务处理的应用案例。该案例中定义了一个ManualApplyTask类实现Callable接口来执行具体的任务逻辑，并展示了如何使用ExecutorService来管理这些并发任务。

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import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class Test1 {


    public static void main(String[] args) {


        /*List<String> strs = new ArrayList<String>();
        strs.add("a");
        strs.add("b");
        strs.add("c");
        strs.add("d");
        strs.add("e");

        ManualApplyTask task = new ManualApplyTask(strs);
        ExecutorService muthreadPool = Executors.newSingleThreadExecutor();
        muthreadPool.execute(task);
        muthreadPool.shutdown();
        while(!muthreadPool.isTerminated()){
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                System.out.println("手动代扣异常："+e);
            }
        }*/

        for(int i=0;i<3;i++){
            List<String> strs = new ArrayList<String>();
            strs.add("a");
            strs.add("b");
            strs.add("c");
            strs.add("d");
            strs.add("e");

            Test1 test1 = new Test1();
            test1.executeTask(strs);
            System.out.println("test end" + i);
        }
        System.out.println("main end");

    }

    public void executeTask(List<String> strs){

        ManualApplyTask task = new ManualApplyTask(strs);
        //起单独线程执行
        ExecutorService executor = Executors.newCachedThreadPool();
        Future<Integer> result = executor.submit(task);
        executor.shutdown();
        System.out.println("executeTask end");
    }

    class ManualApplyTask implements Callable<Integer> {

        private List<String> strs;

        public ManualApplyTask(List<String> strs){
            this.strs = strs;
        }

        @Override
        public Integer call() throws Exception {
            synchronized (ManualApplyTask.class){
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                for(String str : strs){
                    System.out.println(str);
                }
                System.out.println("task end");
            }
            return 1;
        }
    }


}