123

ruoyi-cai/src/main/java/com/ruoyi/cai/util/CaiNumUtil.java

@@ -5,7 +5,7 @@ import cn.hutool.core.util.NumberUtil;
 import java.math.BigDecimal;
 import java.math.RoundingMode;
 
-public class NumCaUtil {
+public class CaiNumUtil {
 
     /**
      * 向下取整计算金额
@@ -21,7 +21,12 @@ public class NumCaUtil {
         return decimal.setScale(0, RoundingMode.DOWN).longValue();
     }
 
+    public static String rateToStr(BigDecimal rate){
+        BigDecimal mul = NumberUtil.mul(rate, 100);
+        return mul.intValue()+"%";
+    }
+
     public static void main(String[] args) {
-        System.out.println(coin(5200L,BigDecimal.valueOf(0.07)));
+        System.out.println(rateToStr(BigDecimal.valueOf(0.07)));
     }
 }