1.首先我们进行抽红包概率测试的时候，为了测试抽取红包的概率完全正确。个人建议不使用线程池多线程执行，建议直接使用for循环执行
2.我们调取抽红包接口返回的信息值进行判断
3.下面就是判断代码，然后是抽红包接口代码

@Test
public static void test1(){
        int a=0;
        int b=0;
        int c=0;
        int d=0;
        int e=0;
        int f=0;
        int g=0;
        int h=0;
        int zong=1000;
    for (int i = 0; i < zong; i++) {
        Double aDouble = testRequestUn();
        if (aDouble != null) {
            if (aDouble==1.8){
                a++;
            }else if (aDouble==2.8){
                b++;
            }else if (aDouble==3.8){
                c++;
            }else if (aDouble==4.8){
                d++;
            }else if (aDouble==5.8){
                e++;
            }else if (aDouble==6.8){
                f++;
            }else if (aDouble==7.8){
                g++;
            }else if (aDouble==8.8){
                h++;
            }
        }
    }
       int asd=a+b+c+d+e+f+g+h;
       double a1= (double) a / zong;
       double b1= (double) b / zong;
       double c1= (double) c / zong;
       double d1= (double) d / zong;
       double e1= (double) e / zong;
       double f1= (double) f / zong;
       double g1= (double) g / zong;
       double h1= (double) h / zong;
       System.out.println("总和"+asd);
       System.out.println(a+"==="+b+"==="+c+"==="+d+"==="+e+"==="+f+"==="+g+"==="+h);
       System.out.println("1.8占比"+a1+"%"+"=="+"2.8占比"+b1+"%"+"=="+"3.8占比"+c1+"%"+"=="+"4.8占比"+d1+"%"+"=="
               +"5.8占比"+e1+"%"+"=="+"6.8占比"+f1+"%"+"=="+"7.8占比"+g1+"%"+"=="+"8.8占比"+h1+"%");
}

示例：模拟抽红包接口代码

 private static Double testRequestUn() {
 		//编写自己的抽红包接口和返回值
        Random random = new Random();
        int i1 = random.nextInt(8);
        Double asd = null;
        Double[] arr={1.8,2.8,3.8,4.8,5.8,6.8,7.8,8.8};
            asd= arr[i1];

        return asd;
    }

抽红包接口，但是不管用哦，地址什么的都要改成自己的

package com.znzdh.jiekou;

import com.alibaba.fastjson.JSONObject;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.testng.annotations.Test;

import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.logging.Logger;

public class Dalor {

    @Test
    public Double choujiang() throws InterruptedException {
        Logger log = Logger.getLogger("choujiang");
        log.info("创建一个可关闭的httpclient客户端");
        CloseableHttpClient aDefault = HttpClients.createDefault();

        log.info("设置接口地址");
        String url="http://192.168.31.125:8081/liandongApplet/app/prize/luckDraw";//测试环境
        Thread.sleep(1000);
        log.info("创建一个httppost");
        HttpPost httpPost = new HttpPost(url);

        httpPost.addHeader("Content-Type","application/json; charset=utf-8");
        httpPost.addHeader("Authorization","App Bearer 7a7118b8-96d1-49c4-acde-5b2b885f62ef");
        ArrayList<NameValuePair> list = new ArrayList<>();
        list.add(new BasicNameValuePair("merchantId","125000610470322176"));

        //把参数集中设置到urlEncodedformEntity中
        UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(list, Consts.UTF_8);
        httpPost.setEntity(formEntity);
        //==============================
        Thread.sleep(1000);
        //把formEntity值设置到httppost对象中
        //httpPost.setEntity(stringEntity);
        Thread.sleep(1000);
        //======================
        CloseableHttpResponse response = null;
        try{
            //获取客户端的.execut(httppost),返回一个response
            response=aDefault.execute(httpPost);
            Thread.sleep(1000);
            //获取response分润getEntity类
            HttpEntity entity = response.getEntity();
            //使用Entityuntils的工具类转换成toString设置编码
            String sen = EntityUtils.toString(entity, StandardCharsets.UTF_8);
            System.out.println(sen);
            /*
            
            
            上面entity的值有一个是需要返回的，那么把他放到下面return中进行返回
            
            
            
            */
            //释放资源
            EntityUtils.consume(entity);
        }catch (Exception | Error e){
            e.printStackTrace();
        }finally {
            //关闭可关闭的
            if (aDefault != null){
                try {
                    aDefault.close();
                }catch (Exception e){
                    e.printStackTrace();
                }

            }
            //关闭可关闭的response
            if (response != null){
                try {
                    response.close();
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }

        return null;
    }
}