Java 多线程 Java多线程提交按照时间顺序获取线程结果详解流程

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

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;
 
/**
 * @author huyi
 * @date 2021/11/1 下午2:22
 */
public class ThreadPriorityUtil {
  private static final ExecutorService EXECUTOR_SERVICE = Executors.newFixedThreadPool(100);
 
    /**
     * 提交多个任务
     * @param tasks 任务
     * @param consumer 结果消费
     * @param <T> 泛型
     */
  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();
  }
}