refactor(mall): 优化 BigDecimal 的舍入方式

KKSU

2025-01-09 e63f08bb358dd2d53a1bece9fb7654ff196c113b

refactor(mall): 优化 BigDecimal 的舍入方式

- 将 BigDecimal.ROUND_DOWN 替换为 RoundingMode.DOWN，提高代码可读性
- 统一使用 RoundingMode.DOWN 进行舍入操作，确保计算一致性
- 优化部分注释代码，提高代码整洁度

 src/main/java/cc/mrbird/febs/mall/service/impl/ApiMallOrderInfoServiceImpl.java

@@ -42,6 +42,7 @@
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.*;
import java.util.stream.Collectors;

@@ -344,18 +345,18 @@
        for (Map.Entry<Long,BigDecimal> entry : skuMap.entrySet()) {
            Long keySkuId = entry.getKey();
            BigDecimal valueSkuAmount = entry.getValue();
            BigDecimal divide = valueSkuAmount.divide(totalAmount, 4, BigDecimal.ROUND_DOWN);//每个商品占符合满减的总额的比例
            BigDecimal divide = valueSkuAmount.divide(totalAmount, 4, RoundingMode.DOWN);//每个商品占符合满减的总额的比例
            skuMapPercent.put(keySkuId,divide);
            Integer type = mallGoodsCoupon.getType();
            if(MallGoodsCoupon.TYPE_ONE == type){
                BigDecimal bigDecimal = realAmount.multiply(divide).setScale(0, BigDecimal.ROUND_DOWN);//每个SKU的减免金额(比例*减免金额)
                BigDecimal bigDecimal = realAmount.multiply(divide).setScale(0, RoundingMode.DOWN);//每个SKU的减免金额(比例*减免金额)
                BigDecimal skuRealAmount = valueSkuAmount.subtract(bigDecimal.compareTo(BigDecimal.ZERO) > 0 ? bigDecimal : BigDecimal.ZERO);//实际支付金额
                couponAmountMap.put(keySkuId,skuRealAmount);
            }
            if(MallGoodsCoupon.TYPE_TWO == type){
                BigDecimal divideTime = totalAmount.divide(costAmount, 0, BigDecimal.ROUND_DOWN);//累计减免次数
                BigDecimal divideTime = totalAmount.divide(costAmount, 0, RoundingMode.DOWN);//累计减免次数
                BigDecimal multiply = divideTime.multiply(realAmount);//实际减免金额
                BigDecimal bigDecimal = multiply.multiply(divide).setScale(0, BigDecimal.ROUND_DOWN);//每个SKU的减免金额(比例*实际减免金额)
                BigDecimal bigDecimal = multiply.multiply(divide).setScale(0, RoundingMode.DOWN);//每个SKU的减免金额(比例*实际减免金额)
                BigDecimal skuRealAmount = valueSkuAmount.subtract(bigDecimal.compareTo(BigDecimal.ZERO) > 0 ? bigDecimal : BigDecimal.ZERO);//实际支付金额
                couponAmountMap.put(keySkuId,skuRealAmount);
            }
@@ -682,7 +683,7 @@
//                        mallLeaderAchieve.setOrderItemId(mallOrderItem.getId());
//                        BigDecimal itemAmount = mallOrderItem.getAmount();
//                        mallLeaderAchieve.setAmount(itemAmount);
//                        BigDecimal bigDecimal = bonusPercent.multiply(itemAmount).setScale(2, BigDecimal.ROUND_DOWN);
//                        BigDecimal bigDecimal = bonusPercent.multiply(itemAmount).setScale(2, RoundingMode.DOWN);
//                        mallLeaderAchieve.setProfitAmount(bigDecimal);
//                        mallLeaderAchieve.setUniqueCode(orderInfo.getTakeUniqueCode());
//                        mallLeaderAchieve.setState(MallLeaderAchieve.STATE_ONE);