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delete 计算余额退款方法
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Guoqs
@@ -38,7 +38,6 @@ import org.springframework.beans.factory.annotation.Value;
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import javax.annotation.Resource;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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@@ -800,147 +799,6 @@ public abstract class AbstractProgramLogic implements InitializingBean {
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return resultMap;
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}
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/**
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* 余额支付 计算需要退回的金额
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* 【公共方法】
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*
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* @param principalPay 本金支付金额
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* @param giftPay 赠送金额支付的金额
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* @param orderAmount 订单消费金额
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* @param discountAmount 订单折扣金额
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* @param insuranceAmount 保险金额
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* @return
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*/
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protected static Map<String, BigDecimal> calculateReturnAmount(BigDecimal principalPay, BigDecimal giftPay, BigDecimal orderAmount, BigDecimal discountAmount, BigDecimal insuranceAmount) {
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// 创建返回的Map
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Map<String, BigDecimal> refundMap = new HashMap<>();
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// 初始化所有返回值为0
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refundMap.put("returnPrincipal", BigDecimal.ZERO);
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refundMap.put("returnGift", BigDecimal.ZERO);
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refundMap.put("returnPrincipalForInsurance", BigDecimal.ZERO);
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refundMap.put("returnGiftForInsurance", BigDecimal.ZERO);
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// 设置精度为2位小数
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RoundingMode roundingMode = RoundingMode.HALF_UP;
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int scale = 2;
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// 1. 计算总支付金额和电费预付金额
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BigDecimal totalPay = principalPay.add(giftPay).setScale(scale, roundingMode);
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BigDecimal prepaidElectricity = totalPay.subtract(insuranceAmount).setScale(scale, roundingMode);
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// 2. 计算实际电费消费金额（应用折扣）
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BigDecimal actualConsume = orderAmount.subtract(discountAmount);
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if (actualConsume.compareTo(BigDecimal.ZERO) < 0) {
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actualConsume = BigDecimal.ZERO;
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}
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actualConsume = actualConsume.setScale(scale, roundingMode);
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// 3. 计算电费应退款金额
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BigDecimal electricityRefund = prepaidElectricity.subtract(actualConsume);
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if (electricityRefund.compareTo(BigDecimal.ZERO) < 0) {
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electricityRefund = BigDecimal.ZERO;
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}
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electricityRefund = electricityRefund.setScale(scale, roundingMode);
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// 4. 判断保险是否退款（实际电费消费 < 1元时退还保险）
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BigDecimal insuranceRefund = BigDecimal.ZERO;
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boolean isInsuranceRefund = actualConsume.compareTo(new BigDecimal("1.00")) < 0;
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if (isInsuranceRefund) {
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insuranceRefund = insuranceAmount.setScale(scale, roundingMode);
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}
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// 5. 计算电费退款中本金和赠金的部分（优先使用本金，退款时优先退回赠金）
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BigDecimal remainingElectricityRefund = electricityRefund;
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BigDecimal principalUsedForElectricity = BigDecimal.ZERO;
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BigDecimal giftUsedForElectricity = BigDecimal.ZERO;
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// 5.1 计算本金和赠金在电费预付中的使用情况
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if (prepaidElectricity.compareTo(BigDecimal.ZERO) > 0) {
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// 本金优先用于支付电费，最多不超过本金总额且不超过电费预付金额
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principalUsedForElectricity = principalPay.min(prepaidElectricity);
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principalUsedForElectricity = principalUsedForElectricity.setScale(scale, roundingMode);
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// 剩余的电费预付由赠金支付
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giftUsedForElectricity = prepaidElectricity.subtract(principalUsedForElectricity);
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giftUsedForElectricity = giftUsedForElectricity.setScale(scale, roundingMode);
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// 5.2 分配电费退款（优先退回赠金）
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// 先退赠金支付的部分
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if (giftUsedForElectricity.compareTo(BigDecimal.ZERO) > 0) {
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BigDecimal giftRefundForElectricity = remainingElectricityRefund.min(giftUsedForElectricity);
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giftRefundForElectricity = giftRefundForElectricity.setScale(scale, roundingMode);
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refundMap.put("returnGift", giftRefundForElectricity);
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remainingElectricityRefund = remainingElectricityRefund.subtract(giftRefundForElectricity);
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}
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// 剩余的电费退款退回到本金
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if (remainingElectricityRefund.compareTo(BigDecimal.ZERO) > 0) {
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BigDecimal principalRefundForElectricity = remainingElectricityRefund.min(principalUsedForElectricity);
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principalRefundForElectricity = principalRefundForElectricity.setScale(scale, roundingMode);
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refundMap.put("returnPrincipal", principalRefundForElectricity);
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}
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}
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// 6. 计算保险退款中本金和赠金的部分
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if (insuranceRefund.compareTo(BigDecimal.ZERO) > 0) {
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// 计算支付电费后剩余的本金和赠金
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BigDecimal remainingPrincipalAfterElectricity = principalPay.subtract(refundMap.get("returnPrincipal"));
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BigDecimal remainingGiftAfterElectricity = giftPay.subtract(refundMap.get("returnGift"));
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// 保险支付顺序：优先使用剩余本金，不足部分用赠金
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BigDecimal principalUsedForInsurance = remainingPrincipalAfterElectricity.min(insuranceAmount);
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BigDecimal giftUsedForInsurance = insuranceAmount.subtract(principalUsedForInsurance);
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// 保险退款（优先退回赠金部分）
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BigDecimal remainingInsuranceRefund = insuranceRefund;
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// 先退赠金支付的保险部分
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if (giftUsedForInsurance.compareTo(BigDecimal.ZERO) > 0) {
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BigDecimal giftRefundForInsurance = remainingInsuranceRefund.min(giftUsedForInsurance);
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giftRefundForInsurance = giftRefundForInsurance.setScale(scale, roundingMode);
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refundMap.put("returnGiftForInsurance", giftRefundForInsurance);
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remainingInsuranceRefund = remainingInsuranceRefund.subtract(giftRefundForInsurance);
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}
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// 剩余的保险退款退回到本金
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if (remainingInsuranceRefund.compareTo(BigDecimal.ZERO) > 0) {
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BigDecimal principalRefundForInsurance = remainingInsuranceRefund.min(principalUsedForInsurance);
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principalRefundForInsurance = principalRefundForInsurance.setScale(scale, roundingMode);
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refundMap.put("returnPrincipalForInsurance", principalRefundForInsurance);
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}
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}
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return refundMap;
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}
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public static void main(String[] args) {
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BigDecimal principalPay = new BigDecimal("30");
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BigDecimal giftPay = new BigDecimal("20");
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BigDecimal orderAmount = new BigDecimal("0.8");
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BigDecimal discountAmount = new BigDecimal("0");
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BigDecimal insuranceAmount = new BigDecimal("0.0");
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Map<String, BigDecimal> stringBigDecimalMap = calculateReturnAmount(principalPay, giftPay, orderAmount, discountAmount, insuranceAmount);
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// 获取各项退款金额
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BigDecimal returnPrincipal = stringBigDecimalMap.get("returnPrincipal");
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BigDecimal returnGift = stringBigDecimalMap.get("returnGift");
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BigDecimal returnPrincipalForInsurance = stringBigDecimalMap.get("returnPrincipalForInsurance");
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BigDecimal returnGiftForInsurance = stringBigDecimalMap.get("returnGiftForInsurance");
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// 计算总计
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BigDecimal electricityRefund = returnPrincipal.add(returnGift);
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BigDecimal insuranceRefund = returnPrincipalForInsurance.add(returnGiftForInsurance);
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BigDecimal totalRefund = electricityRefund.add(insuranceRefund);
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BigDecimal totalPrincipalRefund = returnPrincipal.add(returnPrincipalForInsurance);
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BigDecimal totalGiftRefund = returnGift.add(returnGiftForInsurance);
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String input = String.format("输入：本金%s元，赠金%s元，消费%s元，折扣%s元，保险%s元", principalPay, giftPay, orderAmount, discountAmount, insuranceAmount);
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System.out.println(input);
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String output = String.format("输出：%s元，赠金%s元，保险%s元，总退款%s元", returnPrincipal, returnGift, returnPrincipalForInsurance, returnGiftForInsurance, totalRefund);
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System.out.println(output);
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}
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/**
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* 计算解冻金额
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*
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