产品明细现价计算错误修复，折扣校验修改，获取明细接口错误结果修复

cf-module-system/cf-module-system-biz/src/main/java/com/cf/imes/module/system/controller/admin/funds/products/ProductsDetailController.java

@@ -58,9 +58,8 @@ public class ProductsDetailController {
     @Operation(summary = "查询产品明细")
     @Parameter(name = "id", description = "编号", required = true, example = "1024")
     @PreAuthorize("@ss.hasPermission('base:productDetails:query')")
-    public CommonResult<List<ProductsDetailDO>> getProductsDetail(@PathVariable("id") Long id) {
-        List<ProductsDetailDO> productDetailsDO = productDetailsService.get(id);
-        return success(productDetailsDO);
+    public CommonResult<ProductsDetailDO> getProductsDetail(@PathVariable("id") Long id) {
+        return success(productDetailsService.get(id));
     }
 
     @GetMapping("/page")

cf-module-system/cf-module-system-biz/src/main/java/com/cf/imes/module/system/controller/admin/funds/products/vo/productDetails/ProductDetailsSaveReqVO.java

@@ -4,6 +4,8 @@ import com.cf.imes.framework.common.validation.NumberValid;
 import com.cf.imes.module.system.validation.products.ProductType;
 import com.cf.imes.module.system.validation.products.TimeUnitValid;
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.DecimalMax;
+import jakarta.validation.constraints.DecimalMin;
 import lombok.Data;
 
 import jakarta.validation.constraints.NotNull;
@@ -51,7 +53,8 @@ public class ProductDetailsSaveReqVO {
     private BigDecimal originalPrice;
 
     @Schema(description = "折扣", requiredMode = Schema.RequiredMode.REQUIRED, example = "0.8")
-    @NumberValid(name = "折扣", integer = 4, fraction = 2)
+    @DecimalMax(value = "100", inclusive = false, message = "折扣必须小于100")
+    @DecimalMin(value = "0", inclusive = false, message = "折扣必须大于0")
     private BigDecimal discount;
 
     @Schema(description = "产品现价", requiredMode = Schema.RequiredMode.REQUIRED, example = "80")

cf-module-system/cf-module-system-biz/src/main/java/com/cf/imes/module/system/service/funds/products/ProductsDetailService.java

@@ -40,11 +40,11 @@ public interface ProductsDetailService {
     void delete(Long id);
 
     /**
-     * 获得产品
+     * 获取产品定价
      *
      * @param id 编号
      */
-    List<ProductsDetailDO> get(Long id);
+    ProductsDetailDO get(Long id);
 
     /**
      * 获得产品 分页

cf-module-system/cf-module-system-biz/src/main/java/com/cf/imes/module/system/service/funds/products/ProductsDetailServiceImpl.java

@@ -112,9 +112,8 @@ public class ProductsDetailServiceImpl implements ProductsDetailService {
     }
 
     @Override
-    public List<ProductsDetailDO> get(Long id) {
-        validateProductDetailsExists(id);
-        return productDetailsMapper.selectList();
+    public ProductsDetailDO get(Long id) {
+        return validateProductDetailsExists(id);
     }
 
     @Override
@@ -219,8 +218,8 @@ public class ProductsDetailServiceImpl implements ProductsDetailService {
      */
     private void calculateDiscount(BigDecimal originalPrice, BigDecimal currentPrice, BigDecimal discount) {
         // 校验当前价格是否正确
-        // 计算期望现价（保留2位小数，四舍五入）
-        BigDecimal expectedPrice = originalPrice.multiply(discount).setScale(2, RoundingMode.HALF_UP);
+        // 计算期望现价 = 原价 * 折扣 /100（保留2位小数）
+        BigDecimal expectedPrice = originalPrice.multiply(discount).divide(new BigDecimal(100)).setScale(2, RoundingMode.DOWN);
 
         if (currentPrice.compareTo(expectedPrice) != 0) {
             throw ServiceExceptionUtil.exception(PRODUCTS_DETAIL_CURRENTPRICE_CALCULATE_ERROR, expectedPrice);