feat:refund

service/src/main/java/com/jiejing/fitness/finance/service/utils/FeeUtil.java

@@ -43,8 +43,7 @@ public class FeeUtil {
     // 机构剩余实收金额
     BigDecimal leftPayActualAmount = MoneyUtil.subtract(payActualAmount, historyRefundActualAmount);
     // 试算手续费：向下取整（退款金额/原交易金额*原支付交易手续费金额）
-    BigDecimal trialFee = MoneyUtil.divide(refundTransAmount.multiply(payFee), payTransAmount, 2,
-        RoundingMode.FLOOR);
+    BigDecimal trialFee = calculateTrialFee(refundTransAmount, payTransAmount, payFee);
     // 试算实退金额
     BigDecimal trialActualAmount = MoneyUtil.subtract(refundTransAmount, trialFee);
     // 实退手续费
@@ -52,15 +51,69 @@ public class FeeUtil {
         : MoneyUtil.add(trialFee, MoneyUtil.subtract(trialActualAmount, leftPayActualAmount));
   }
 
+  /**
+   * 计算试算手续费
+   * <p>
+   * 试算手续费 = 向下取整(退款金额/原交易金额*原交易手续费金额)
+   */
+  private static BigDecimal calculateTrialFee(BigDecimal refundTransAmount, BigDecimal payTransAmount,
+      BigDecimal payFee) {
+    // 试算手续费：向下取整（退款金额/原交易金额*原支付交易手续费金额）
+    return MoneyUtil.divide(refundTransAmount.multiply(payFee), payTransAmount, 2,
+        RoundingMode.FLOOR);
+  }
+
   public static void main(String[] args) {
-    BigDecimal refundTransAmount = new BigDecimal("100");
     BigDecimal payTransAmount = new BigDecimal("100");
     BigDecimal payActualAmount = new BigDecimal("99.43");
     BigDecimal payFee = new BigDecimal("0.57");
-    BigDecimal historyRefundActualAmount = new BigDecimal("99.43");
+    BigDecimal refundAmount1 = new BigDecimal("33");
+    BigDecimal refundAmount2 = new BigDecimal("33");
+    BigDecimal refundAmount3 = new BigDecimal("33");
+    BigDecimal refundAmount4 = new BigDecimal("1");
+
+    BigDecimal fee1 = test33(payTransAmount, payActualAmount, payFee, refundAmount1,
+        new BigDecimal("0"));
+    BigDecimal historyRefundActualAmount1 = MoneyUtil.subtract(refundAmount1, fee1);
+    BigDecimal leftPayActualAmount1 = MoneyUtil.subtract(payActualAmount, historyRefundActualAmount1);
     System.out.println(
-        FeeUtil.calculateRefundFee(refundTransAmount, payTransAmount, payActualAmount, payFee,
-            historyRefundActualAmount));
+        ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 收款金额：\t" + payTransAmount + "，实收金额：\t" + payActualAmount + "，收款手续费：\t"
+            + payFee + "，退款申请金额：\t" + refundAmount1 + "，手续费：\t" + fee1 + "，剩余实收金额：\t" + leftPayActualAmount1);
+
+    BigDecimal fee2 = test33(payTransAmount, payActualAmount, payFee, refundAmount2,
+        historyRefundActualAmount1);
+    BigDecimal historyRefundActualAmount2 = MoneyUtil.add(MoneyUtil.subtract(refundAmount2, fee2),
+        historyRefundActualAmount1);
+    BigDecimal leftPayActualAmount2 = MoneyUtil.subtract(payActualAmount, historyRefundActualAmount2);
+    System.out.println(
+        ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 收款金额：\t" + payTransAmount + "，实收金额：\t" + payActualAmount + "，收款手续费：\t"
+            + payFee + "，退款申请金额：\t" + refundAmount2 + "，手续费：\t" + fee2 + "，剩余实收金额：\t" + leftPayActualAmount2);
+
+    BigDecimal fee3 = test33(payTransAmount, payActualAmount, payFee, refundAmount3,
+        historyRefundActualAmount2);
+    BigDecimal historyRefundActualAmount3 = MoneyUtil.add(MoneyUtil.subtract(refundAmount3, fee3),
+        historyRefundActualAmount2);
+    BigDecimal leftPayActualAmount3 = MoneyUtil.subtract(payActualAmount, historyRefundActualAmount3);
+    System.out.println(
+        ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 收款金额：\t" + payTransAmount + "，实收金额：\t" + payActualAmount + "，收款手续费：\t"
+            + payFee + "，退款申请金额：\t" + refundAmount3 + "，手续费：\t" + fee3 + "，剩余实收金额：\t" + leftPayActualAmount3);
+
+    BigDecimal fee4 = test33(payTransAmount, payActualAmount, payFee, refundAmount4,
+        historyRefundActualAmount3);
+    BigDecimal historyRefundActualAmount4 = MoneyUtil.add(MoneyUtil.subtract(refundAmount4, fee4),
+        historyRefundActualAmount3);
+    BigDecimal leftPayActualAmount4 = MoneyUtil.subtract(payActualAmount, historyRefundActualAmount4);
+    System.out.println(
+        ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 收款金额：\t" + payTransAmount + "，实收金额：\t" + payActualAmount + "，收款手续费：\t"
+            + payFee + "，退款申请金额：\t" + refundAmount4 + "，手续费：\t" + fee4 + "，剩余实收金额：\t" + leftPayActualAmount4);
+
+  }
+
+  private static BigDecimal test33(BigDecimal payTransAmount, BigDecimal payActualAmount, BigDecimal payFee,
+      BigDecimal refundTransAmount, BigDecimal historyRefundActualAmount) {
+    return FeeUtil.calculateRefundFee(refundTransAmount, payTransAmount, payActualAmount,
+        payFee,
+        historyRefundActualAmount);
   }
 
 }