package utils;

import com.weixin.model.returnCode.LeftMoneyPackage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.DecimalFormat;
import java.util.Random;

public class Test {

    private static Logger logger = LoggerFactory.getLogger(Test.class);

    public static boolean
 
 getRandomMoney(LeftMoneyPackage _leftMoneyPackage) {

        DecimalFormat decimalFormat = new DecimalFormat("0.00");
        // remainSize 剩餘的紅包數量
        // remainMoney 剩餘的錢
        if (_leftMoneyPackage.remainSize == 1) {
            _leftMoneyPackage.remainSize--;
//            return (double) Math.round(_leftMoneyPackage.remainMoney * 100) / 100;
 

            logger.info("領取金錢:"+decimalFormat.format(_leftMoneyPackage.remainMoney));
            logger.info("剩餘紅包為:"+_leftMoneyPackage.remainSize);
            _leftMoneyPackage.remainMoney -= _leftMoneyPackage.remainMoney;
            logger.info("紅包已經領取完");

            return true;
        }


        Random r     = new
 
 Random();
        double min   = 0.01; //
        double max   = _leftMoneyPackage.remainMoney / _leftMoneyPackage.remainSize * 2;
        double money = r.nextDouble() * max;
        money = money <= min ? 0.01: money;
        money = Math.floor(money * 100) / 100;
        _leftMoneyPackage.remainSize--;
        _leftMoneyPackage.remainMoney -= money;
        logger.info("領取金錢:"+decimalFormat.format(money));
        logger.info("剩餘紅包為:"+_leftMoneyPackage.remainSize);
       return getRandomMoney(_leftMoneyPackage);
    }

    public static void main(String[] args) {

        LeftMoneyPackage leftMoneyPackage = new LeftMoneyPackage(10.00,3);

           getRandomMoney(leftMoneyPackage);



    }
}

結果截圖：