分期出账优化、应收款应付款金额精度3

yd-csf-service/src/main/java/com/yd/csf/service/service/impl/FortuneServiceImpl.java

@@ -37,6 +37,7 @@ import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.net.URLEncoder;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
@@ -850,34 +851,42 @@ public class FortuneServiceImpl extends ServiceImpl<FortuneMapper, Fortune>
 
         List<FortuneSplitDto> splitList = fortuneSplitRequest.getFortuneSplitDtoList();
 
-        // 3. 保单币锚守恒：Σ各期保单币份额 严格等于原记录 ruleAmount（来的钱，2位）
+        BigDecimal originalRuleAmount = originalFortune.getRuleAmount();
+        int lastIndex = splitList.size() - 1;
+
+        // 3. 保单币金额守恒：Σ各期 ruleAmount 必须等于原锚。
+        // 各期金额由财务人工维护，系统不判断各期该填多少；总平不上时只给出末期找平金额，帮其通过校验。
         BigDecimal totalRuleAmount = splitList.stream()
                 .map(FortuneSplitDto::getRuleAmount)
+                .filter(Objects::nonNull)
                 .reduce(BigDecimal.ZERO, BigDecimal::add);
-        if (totalRuleAmount.compareTo(originalFortune.getRuleAmount()) != 0) {
-            throw new BusinessException(ResultCode.PARAM_CHECK_ERROR.getCode(),
-                    String.format("分期保单币金额总和(%s)与原记录保单币金额(%s)必须一致",
-                            totalRuleAmount, originalFortune.getRuleAmount()));
+        if (totalRuleAmount.compareTo(originalRuleAmount) != 0) {
+            BigDecimal sumBeforeLast = BigDecimal.ZERO;
+            for (int i = 0; i < lastIndex; i++) {
+                if (splitList.get(i).getRuleAmount() != null) {
+                    sumBeforeLast = sumBeforeLast.add(splitList.get(i).getRuleAmount());
+                }
+            }
+            // 末期找平金额 = 原锚 - Σ前n-1期（精确到2位，填此值必能过校验）
+            BigDecimal lastLevelAmount = originalRuleAmount.subtract(sumBeforeLast)
+                    .setScale(2, RoundingMode.HALF_UP);
+            String tip = lastLevelAmount.signum() >= 0
+                    ? String.format("「保单币种金额」不平：各期合计 %s，应等于 %s。请将最后一期（第%d期）的「保单币种金额」改为 %s 后提交",
+                            totalRuleAmount, originalRuleAmount, splitList.size(), lastLevelAmount.toPlainString())
+                    : String.format("前%d期「保单币种金额」合计 %s，已超过应发金额 %s，请调减前期金额后提交",
+                            lastIndex, sumBeforeLast, originalRuleAmount);
+            throw new BusinessException(ResultCode.PARAM_CHECK_ERROR.getCode(), tip);
         }
 
-        // 4. 每期港币必须为非负整数（元）。各期汇率可能不同，港币合计不卡总额，以Σ为实际发放港币
+        // 4. 每期港币必须为非负整数（元）。各期汇率可能不同、港币可手改，港币合计不卡总额。
         for (FortuneSplitDto dto : splitList) {
             if (dto.getHkdAmount() == null || dto.getHkdAmount().signum() < 0
                     || dto.getHkdAmount().stripTrailingZeros().scale() > 0) {
                 throw new BusinessException(ResultCode.PARAM_CHECK_ERROR.getCode(), "每期港币金额必须为非负整数（元）");
             }
         }
-
-        // 5. 比例总和必须严格等于 100
-        BigDecimal totalSplitRatio = splitList.stream()
-                .map(FortuneSplitDto::getSplitRatio)
-                .filter(Objects::nonNull)
-                .reduce(BigDecimal.ZERO, BigDecimal::add);
-        if (totalSplitRatio.compareTo(BigDecimal.ZERO) > 0
-                && totalSplitRatio.compareTo(new BigDecimal("100")) != 0) {
-            throw new BusinessException(ResultCode.PARAM_CHECK_ERROR.getCode(),
-                    String.format("分期比例总和(%s%%)必须为100%%", totalSplitRatio));
-        }
+        // 比例不再校验合计=100：金额由人工维护，比例仅作前端算金额的输入与记录参考；
+        // 若同时卡比例=100，会与金额守恒在舍入场景下互斥（如33.33×3金额合计差0.01），无法提交。
 
         // 4. 生成新记录
         List<Fortune> newFortuneList = new ArrayList<>();