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

package com.huyi.csdn.tools;
 
import cn.hutool.core.thread.ThreadUtil;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Phaser;
import java.util.concurrent.TimeUnit;
 

public class PhaserUtil {
  public static final ExecutorService executorService = Executors.newFixedThreadPool(50);
 
  public static class CustomPharser extends Phaser {
    private final Runnable runnable;
 
    public CustomPharser(Runnable runnable) {
      this.runnable = runnable;
    }
 
    @Override
    protected boolean onAdvance(int phase, int reGISteredParties) {
      this.runnable.run();
      return super.onAdvance(phase, registeredParties);
    }
  }
 
  
  public static void submit(List<Runnable> tasks, Runnable complete) {
    Phaser phaser = new CustomPharser(complete);
    for (Runnable runnable : tasks) {
      executorService.submit(
          () -> {
            phaser.register();
            runnable.run();
            System.out.println(Thread.currentThread().getName() + "完成任务！");
            phaser.arriveAndAwaitAdvance();
          });
    }
  }
 
  
  public static void destroy() {
    System.out.println("摧毁线程池");
    executorService.shutdown();
  }
 
  public static void main(String[] args) {
    List<Runnable> tasks = new ArrayList<>();
    Random random = new Random();
    for (int i = 0; i < 10; i++) {
      tasks.add(
          () -> {
            ThreadUtil.sleep(random.nextInt(10), TimeUnit.SECONDS);
          });
    }
    submit(tasks, () -> System.out.println("所有任务已完成"));
    ThreadUtil.sleep(20, TimeUnit.SECONDS);
    destroy();
  }
}