Java多线程提交按照时间顺序获取线程结果详解流程

2024-04-02 19:55

短信预约 -IT技能 免费直播动态提醒

Maven依赖

其实要不要无所谓。主要是为了方便。


        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.7.15</version>
        </dependency>

代码

不废话，上代码。


package com.hy.csdn.tools;
 
import cn.hutool.core.thread.ThreadUtil;
 
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.*;
import java.util.function.Consumer;
 

public class ThreadPriorityUtil {
  private static final ExecutorService EXECUTOR_SERVICE = Executors.newFixedThreadPool(100);
 
    
  public static <T> void submit(List<Callable<T>> tasks, Consumer<T> consumer) {
    CompletionService<T> completionService = new ExecutorCompletionService<>(EXECUTOR_SERVICE);
    tasks.forEach(completionService::submit);
    tasks.forEach(
        x -> {
          try {
            consumer.accept(completionService.take().get());
          } catch (InterruptedException e) {
            e.printStackTrace();
          } catch (ExecutionException e) {
            e.printStackTrace();
          }
        });
  }
 
  public static void destroy() {
    System.out.println("摧毁线程池");
    EXECUTOR_SERVICE.shutdown();
  }
 
  public static void main(String[] args) {
    // 启动3个线程执行试试看
    List<Callable<Integer>> tasks =
        Arrays.asList(
            () -> {
              try {
                TimeUnit.SECONDS.sleep(30);
                System.out.println("task 30 completed");
              } catch (InterruptedException e) {
                e.printStackTrace();
              }
              return 30;
            },
            () -> {
              try {
                TimeUnit.SECONDS.sleep(10);
                System.out.println("task 10 completed");
              } catch (InterruptedException e) {
                e.printStackTrace();
              }
              return 10;
            },
            () -> {
              try {
                TimeUnit.SECONDS.sleep(20);
                System.out.println("task 20 completed");
              } catch (InterruptedException e) {
                e.printStackTrace();
              }
              return 20;
            });
 
    ThreadPriorityUtil.submit(tasks, x -> System.out.println("回调结果：" + x));
 
    ThreadUtil.sleep(40000L);
    ThreadPriorityUtil.destroy();
  }
}

执行看看