多线程执行任务，主线程等到子线程执行完之后结束

package com.zeus.portal;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpUtil;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @description:
 * @author: wmf
 * @create: 2022-05-25 15:26
 **/
public class HtmlSourceIdTest {
    public static void main(String[] args) {

        ExecutorService executorService= Executors.newFixedThreadPool(100);
        int startSourceId = 5000000;
        List<Integer> htmlSourceIds = Collections.synchronizedList(new ArrayList<>());

        for (int i = 0; i < 100; i++) {
            startSourceId = startSourceId + 10000;
            int finalStartSourceId = startSourceId;
            executorService.execute(() -> getSourceId(finalStartSourceId, htmlSourceIds));
        }
        executorService.shutdown();//关闭线程池
        //判断是否所有的线程已经运行完
        while (!executorService.isTerminated()) {

        }
        System.out.println(htmlSourceIds.size());
        htmlSourceIds.forEach(id-> System.out.println(id));

        File file = new File("sourceIds.txt");
        try {
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream(file),"GBK");

            for(int i = 0; i < htmlSourceIds.size(); i++ ) {
                outputStreamWriter.write( htmlSourceIds.get(i) + "\r\n");
            }
            outputStreamWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.out.println("All is finished!");

    }

    private static void getSourceId(int startSourceId, List<Integer> htmlSourceIds) {

        
        
    }


}