33 lines
790 B
Java
33 lines
790 B
Java
package com.ruoyi.cai.util;
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import cn.hutool.core.util.NumberUtil;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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public class CaiNumUtil {
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/**
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* 向下取整计算金额
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* @param value
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* @param rate
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* @return
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*/
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public static Long coin(Long value, BigDecimal rate){
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if(value == null || rate == null){
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return 0L;
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}
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BigDecimal decimal = NumberUtil.mul(value, rate);
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return decimal.setScale(0, RoundingMode.DOWN).longValue();
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}
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public static String rateToStr(BigDecimal rate){
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BigDecimal mul = NumberUtil.mul(rate, 100);
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return mul.intValue()+"%";
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}
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public static void main(String[] args) {
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System.out.println(rateToStr(BigDecimal.valueOf(0.07)));
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}
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}
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