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清理价格计算相关的逻辑

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YunaiV 2022-10-30 18:11:52 +08:00
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18
归档/promotion-service-project/promotion-service-app/src/main/java/cn/iocoder/mall/promotionservice/PromotionServiceApplication.java
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package cn.iocoder.mall.promotionservice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients(basePackages = {"cn.iocoder.mall.productservice.rpc"})
public class PromotionServiceApplication {
public static void main(String[] args) {
SpringApplication.run(PromotionServiceApplication.class, args);
}
}

123
归档/promotion-service-project/promotion-service-app/src/main/java/cn/iocoder/mall/promotionservice/dal/mysql/dataobject/coupon/CouponCardDO.java
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package cn.iocoder.mall.promotionservice.dal.mysql.dataobject.coupon;
import cn.iocoder.mall.mybatis.core.dataobject.BaseDO;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;
import java.util.Date;
/**
* 优惠劵 DO
*/
@TableName("coupon_card")
@Data
@EqualsAndHashCode(callSuper = true)
@Accessors(chain = true)
public class CouponCardDO extends BaseDO {
// ========== 基本信息 BEGIN ==========
/**
* 优惠劵编号
*/
private Integer id;
/**
* 优惠劵（码）分组编号，{@link CouponTemplateDO} 的 id
*/
private Integer templateId;
/**
* 优惠劵名
*
* 冗余自 {@link CouponTemplateDO} 的 title
*
* TODO 芋艿，暂时不考虑冗余的更新
*/
private String title;
// /**
// * 核销码
// */
// private String verifyCode;
/**
* 优惠码状态
*
* 1-未使用
* 2-已使用
* 3-已失效
*/
private Integer status;
// ========== 基本信息 END ==========
// ========== 领取情况 BEGIN ==========
/**
* 用户编号
*/
private Integer userId;
/**
* 领取类型
*
* 1 - 用户主动领取
* 2 - 后台自动发放
*/
private Integer takeType;
// ========== 领取情况 END ==========
// ========== 使用规则 BEGIN ==========
/**
* 是否设置满多少金额可用，单位：分
*/
private Integer priceAvailable;
/**
* 生效开始时间
*/
private Date validStartTime;
/**
* 生效结束时间
*/
private Date validEndTime;
// ========== 使用规则 END ==========
// ========== 使用效果 BEGIN ==========
/**
* 优惠类型
*
* 1-代金卷
* 2-折扣卷
*/
private Integer preferentialType;
/**
* 折扣
*/
private Integer percentOff;
/**
* 优惠金额，单位：分。
*/
private Integer priceOff;
/**
* 折扣上限，仅在 {@link #preferentialType} 等于 2 时生效。
*
* 例如，折扣上限为 20 元，当使用 8 折优惠券，订单金额为 1000 元时，最高只可折扣 20 元，而非 80 元。
*/
private Integer discountPriceLimit;
// ========== 使用效果 END ==========
// ========== 使用情况 BEGIN ==========
// /**
// * 使用订单号
// */
// private Integer usedOrderId; // TODO 芋艿，暂时不考虑这个字段
// /**
// * 订单中优惠面值，单位：分
// */
// private Integer usedPrice; // TODO 芋艿，暂时不考虑这个字段
/**
* 使用时间
*/
private Date usedTime;
// TODO 芋艿，后续要加优惠劵的使用日志，因为下单后，可能会取消。
// ========== 使用情况 END ==========
}

336
归档/promotion-service-project/promotion-service-app/src/main/java/cn/iocoder/mall/promotionservice/manager/price/PriceManager.java
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package cn.iocoder.mall.promotionservice.manager.price;
import cn.iocoder.common.framework.exception.util.ServiceExceptionUtil;
import cn.iocoder.common.framework.util.CollectionUtils;
import cn.iocoder.common.framework.vo.CommonResult;
import cn.iocoder.mall.productservice.rpc.sku.ProductSkuFeign;
import cn.iocoder.mall.productservice.rpc.sku.dto.ProductSkuListQueryReqDTO;
import cn.iocoder.mall.productservice.rpc.sku.dto.ProductSkuRespDTO;
import cn.iocoder.mall.productservice.rpc.spu.ProductSpuFeign;
import cn.iocoder.mall.productservice.rpc.spu.dto.ProductSpuRespDTO;
import cn.iocoder.mall.promotion.api.enums.MeetTypeEnum;
import cn.iocoder.mall.promotion.api.enums.PreferentialTypeEnum;
import cn.iocoder.mall.promotion.api.enums.RangeTypeEnum;
import cn.iocoder.mall.promotion.api.enums.activity.PromotionActivityStatusEnum;
import cn.iocoder.mall.promotion.api.enums.activity.PromotionActivityTypeEnum;
import cn.iocoder.mall.promotion.api.rpc.activity.dto.PromotionActivityRespDTO;
import cn.iocoder.mall.promotion.api.rpc.coupon.dto.card.CouponCardRespDTO;
import cn.iocoder.mall.promotion.api.rpc.coupon.dto.template.CouponTemplateRespDTO;
import cn.iocoder.mall.promotion.api.rpc.price.dto.PriceProductCalcReqDTO;
import cn.iocoder.mall.promotion.api.rpc.price.dto.PriceProductCalcRespDTO;
import cn.iocoder.mall.promotionservice.service.activity.PromotionActivityService;
import cn.iocoder.mall.promotionservice.service.coupon.CouponCardService;
import cn.iocoder.mall.promotionservice.service.coupon.CouponTemplateService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.Assert;
import org.springframework.validation.annotation.Validated;
import java.util.*;
import java.util.stream.Collectors;
import static cn.iocoder.mall.promotion.api.enums.PromotionErrorCodeConstants.*;
@Service
@Validated
public class PriceManager {
@Autowired
private ProductSkuFeign productSkuFeign;
@Autowired
private ProductSpuFeign productSpuFeign;
@Autowired
private PromotionActivityService promotionActivityService;
@Autowired
private CouponCardService couponCardService;
@Autowired
private CouponTemplateService couponTemplateService;
public PriceProductCalcRespDTO calcProductPrice(PriceProductCalcReqDTO calcReqDTO) {
// 拼装结果（主要是计算价格）
PriceProductCalcRespDTO calcRespDTO = new PriceProductCalcRespDTO();
List<PromotionActivityRespDTO> activityRespDTOs = promotionActivityService.listPromotionActivitiesBySpuIds(
CollectionUtils.convertSet(listProductSkusResult.getData(), ProductSkuRespDTO::getSpuId),
Collections.singleton(PromotionActivityStatusEnum.RUN.getValue()));
// 2. 计算【限时折扣】促销
this.modifyPriceByTimeLimitDiscount(calcItemRespDTOs, activityRespDTOs);
// 3. 计算【满减送】促销
List<PriceProductCalcRespDTO.ItemGroup> itemGroups = this.groupByFullPrivilege(calcItemRespDTOs, activityRespDTOs);
calcRespDTO.setItemGroups(itemGroups);
// 4. 计算优惠劵 TODO 芋艿：未详细测试；
if (calcReqDTO.getCouponCardId() != null) {
Integer result = this.modifyPriceByCouponCard(calcReqDTO.getUserId(), calcReqDTO.getCouponCardId(), itemGroups);
calcRespDTO.setCouponCardDiscountTotal(result);
}
// 5. 计算最终的价格
int buyTotal = 0;
int discountTotal = 0;
int presentTotal = 0;
for (PriceProductCalcRespDTO.ItemGroup itemGroup : calcRespDTO.getItemGroups()) {
buyTotal += itemGroup.getItems().stream().mapToInt(item -> item.getSelected() ? item.getBuyTotal() : 0).sum();
discountTotal += itemGroup.getItems().stream().mapToInt(item -> item.getSelected() ? item.getDiscountTotal() : 0).sum();
presentTotal += itemGroup.getItems().stream().mapToInt(item -> item.getSelected() ? item.getPresentTotal() : 0).sum();
}
Assert.isTrue(buyTotal - discountTotal == presentTotal,
String.format("价格合计( %d - %d == %d )不正确", buyTotal, discountTotal, presentTotal));
calcRespDTO.setFee(new PriceProductCalcRespDTO.Fee(buyTotal, discountTotal, 0, presentTotal));
return calcRespDTO;
}
private void modifyPriceByTimeLimitDiscount(List<PriceProductCalcRespDTO.Item> items, List<PromotionActivityRespDTO> activityList) {
for (PriceProductCalcRespDTO.Item item : items) {
// 获得符合条件的限时折扣
PromotionActivityRespDTO timeLimitedDiscount = activityList.stream()
.filter(activity -> PromotionActivityTypeEnum.TIME_LIMITED_DISCOUNT.getValue().equals(activity.getActivityType())
&& activity.getTimeLimitedDiscount().getItems().stream().anyMatch(item0 -> item0.getSpuId().equals(item.getSpuId())))
.findFirst().orElse(null);
if (timeLimitedDiscount == null) {
continue;
}
// 计算价格
Integer newBuyPrice = calcSkuPriceByTimeLimitDiscount(item, timeLimitedDiscount);
if (newBuyPrice.equals(item.getBuyPrice())) { // 未优惠
continue;
}
// 设置优惠
item.setActivityId(timeLimitedDiscount.getId());
// 设置价格
item.setBuyPrice(newBuyPrice);
item.setBuyTotal(newBuyPrice * item.getBuyQuantity());
item.setPresentTotal(item.getBuyTotal() - item.getDiscountTotal());
item.setPresentPrice(item.getPresentTotal() / item.getBuyQuantity());
}
}
/**
* 计算指定 SKU 在限时折扣下的价格
*
* @param sku SKU
* @param timeLimitedDiscount 限时折扣促销。
* 传入的该活动，要保证该 SKU 在该促销下一定有优惠。
* @return 计算后的价格
*/
private Integer calcSkuPriceByTimeLimitDiscount(PriceProductCalcRespDTO.Item sku, PromotionActivityRespDTO timeLimitedDiscount) {
if (timeLimitedDiscount == null) {
return sku.getBuyPrice();
}
// 获得对应的优惠项
PromotionActivityRespDTO.TimeLimitedDiscount.Item item = timeLimitedDiscount.getTimeLimitedDiscount().getItems().stream()
.filter(item0 -> item0.getSpuId().equals(sku.getSpuId()))
.findFirst().orElse(null);
if (item == null) {
throw new IllegalArgumentException(String.format("折扣活动(%s) 不存在商品(%s) 的优惠配置",
timeLimitedDiscount.toString(), sku.toString()));
}
// 计算价格
if (PreferentialTypeEnum.PRICE.getValue().equals(item.getPreferentialType())) { // 减价
int presentPrice = sku.getBuyPrice() - item.getPreferentialValue();
return presentPrice >= 0 ? presentPrice : sku.getBuyPrice(); // 如果计算优惠价格小于 0 ，则说明无法使用优惠。
}
if (PreferentialTypeEnum.DISCOUNT.getValue().equals(item.getPreferentialType())) { // 打折
return sku.getBuyPrice() * item.getPreferentialValue() / 100;
}
throw new IllegalArgumentException(String.format("折扣活动(%s) 的优惠类型不正确", timeLimitedDiscount.toString()));
}
private List<PriceProductCalcRespDTO.ItemGroup> groupByFullPrivilege(List<PriceProductCalcRespDTO.Item> items, List<PromotionActivityRespDTO> activityList) {
List<PriceProductCalcRespDTO.ItemGroup> itemGroups = new ArrayList<>();
// 获得所有满减送促销
List<PromotionActivityRespDTO> fullPrivileges = activityList.stream()
.filter(activity -> PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()))
.collect(Collectors.toList());
// 基于满减送促销，进行分组
if (!fullPrivileges.isEmpty()) {
items = new ArrayList<>(items); // 因为下面会修改数组，进行浅拷贝，避免影响传入的 items 。
for (PromotionActivityRespDTO fullPrivilege : fullPrivileges) {
// 创建 fullPrivilege 对应的分组
PriceProductCalcRespDTO.ItemGroup itemGroup = new PriceProductCalcRespDTO.ItemGroup()
.setActivityId(fullPrivilege.getId())
.setItems(new ArrayList<>());
// 筛选商品到分组中
for (Iterator<PriceProductCalcRespDTO.Item> iterator = items.iterator(); iterator.hasNext(); ) {
PriceProductCalcRespDTO.Item item = iterator.next();
if (!isSpuMatchFullPrivilege(item.getSpuId(), fullPrivilege)) {
continue;
}
itemGroup.getItems().add(item);
iterator.remove();
}
// 如果匹配到，则添加到 itemGroups 中
if (!itemGroup.getItems().isEmpty()) {
itemGroups.add(itemGroup);
}
}
}
// 处理未参加活动的商品，形成一个分组
if (!items.isEmpty()) {
itemGroups.add(new PriceProductCalcRespDTO.ItemGroup().setItems(items));
}
// 计算每个分组的价格
Map<Integer, PromotionActivityRespDTO> activityMap = CollectionUtils.convertMap(activityList, PromotionActivityRespDTO::getId);
for (PriceProductCalcRespDTO.ItemGroup itemGroup : itemGroups) {
itemGroup.setActivityDiscountTotal(calcSkuPriceByFullPrivilege(itemGroup, activityMap.get(itemGroup.getActivityId())));
}
// 返回结果
return itemGroups;
}
private boolean isSpuMatchFullPrivilege(Integer spuId, PromotionActivityRespDTO activity) {
Assert.isTrue(PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()),
"传入的必须的促销活动必须是满减送");
PromotionActivityRespDTO.FullPrivilege fullPrivilege = activity.getFullPrivilege();
if (RangeTypeEnum.ALL.getValue().equals(fullPrivilege.getRangeType())) {
return true;
} else if (RangeTypeEnum.PRODUCT_INCLUDE_PART.getValue().equals(fullPrivilege.getRangeType())) {
return fullPrivilege.getRangeValues().contains(spuId);
}
throw new IllegalArgumentException(String.format("促销活动(%s) 可用范围的类型是不正确", activity.toString()));
}
private Integer calcSkuPriceByFullPrivilege(PriceProductCalcRespDTO.ItemGroup itemGroup, PromotionActivityRespDTO activity) {
if (itemGroup.getActivityId() == null) {
return null;
}
Assert.isTrue(PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()),
"传入的必须的满减送活动必须是满减送");
// 获得优惠信息
List<PriceProductCalcRespDTO.Item> items = itemGroup.getItems().stream().filter(PriceProductCalcRespDTO.Item::getSelected)
.collect(Collectors.toList());
Integer itemCnt = items.stream().mapToInt(PriceProductCalcRespDTO.Item::getBuyQuantity).sum();
Integer originalTotal = items.stream().mapToInt(PriceProductCalcRespDTO.Item::getPresentTotal).sum();
List<PromotionActivityRespDTO.FullPrivilege.Privilege> privileges = activity.getFullPrivilege().getPrivileges().stream()
.filter(privilege -> {
if (MeetTypeEnum.PRICE.getValue().equals(privilege.getMeetType())) {
return originalTotal >= privilege.getMeetValue();
}
if (MeetTypeEnum.QUANTITY.getValue().equals(privilege.getMeetType())) {
return itemCnt >= privilege.getMeetValue();
}
throw new IllegalArgumentException(String.format("满减送活动(%s) 的匹配(%s)不正确",
activity.toString(), privilege.toString()));
}).collect(Collectors.toList());
// 获得不到优惠信息，返回原始价格
if (privileges.isEmpty()) {
return null;
}
// 获得到优惠信息，进行价格计算
PromotionActivityRespDTO.FullPrivilege.Privilege privilege = privileges.get(privileges.size() - 1);
Integer presentTotal;
if (PreferentialTypeEnum.PRICE.getValue().equals(privilege.getPreferentialType())) { // 减价
// 计算循环次数。这样，后续优惠的金额就是相乘了
Integer cycleCount = 1;
if (activity.getFullPrivilege().getCycled()) {
if (MeetTypeEnum.PRICE.getValue().equals(privilege.getMeetType())) {
cycleCount = originalTotal / privilege.getMeetValue();
} else if (MeetTypeEnum.QUANTITY.getValue().equals(privilege.getMeetType())) {
cycleCount = itemCnt / privilege.getMeetValue();
}
}
presentTotal = originalTotal - cycleCount * privilege.getMeetValue();
if (presentTotal < 0) { // 如果计算优惠价格小于 0 ，则说明无法使用优惠。
presentTotal = originalTotal;
}
} else if (PreferentialTypeEnum.DISCOUNT.getValue().equals(privilege.getPreferentialType())) { // 打折
presentTotal = originalTotal * privilege.getPreferentialValue() / 100;
} else {
throw new IllegalArgumentException(String.format("满减送促销(%s) 的优惠类型不正确", activity.toString()));
}
int discountTotal = originalTotal - presentTotal;
if (discountTotal == 0) {
return null;
}
// 按比例，拆分 presentTotal
splitDiscountPriceToItems(items, discountTotal, presentTotal);
// 返回优惠金额
return originalTotal - presentTotal;
}
private Integer modifyPriceByCouponCard(Integer userId, Integer couponCardId, List<PriceProductCalcRespDTO.ItemGroup> itemGroups) {
Assert.isTrue(couponCardId != null, "优惠劵编号不能为空");
// 查询优惠劵
CouponCardRespDTO couponCard = couponCardService.getCouponCard(userId, couponCardId);
if (couponCard == null) {
throw ServiceExceptionUtil.exception(COUPON_CARD_NOT_EXISTS);
}
CouponTemplateRespDTO couponTemplate = couponTemplateService.getCouponTemplate(couponCardId);
if (couponTemplate == null) {
throw ServiceExceptionUtil.exception(COUPON_TEMPLATE_NOT_EXISTS);
}
// 获得匹配的商品
List<PriceProductCalcRespDTO.Item> items = new ArrayList<>();
if (RangeTypeEnum.ALL.getValue().equals(couponTemplate.getRangeType())) {
itemGroups.forEach(itemGroup -> items.addAll(itemGroup.getItems()));
} else if (RangeTypeEnum.PRODUCT_INCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
itemGroups.forEach(itemGroup -> items.forEach(item -> {
if (couponTemplate.getRangeValues().contains(item.getSpuId())) {
items.add(item);
}
}));
} else if (RangeTypeEnum.PRODUCT_EXCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
itemGroups.forEach(itemGroup -> items.forEach(item -> {
if (!couponTemplate.getRangeValues().contains(item.getSpuId())) {
items.add(item);
}
}));
} else if (RangeTypeEnum.CATEGORY_INCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
itemGroups.forEach(itemGroup -> items.forEach(item -> {
if (couponTemplate.getRangeValues().contains(item.getCid())) {
items.add(item);
}
}));
} else if (RangeTypeEnum.CATEGORY_EXCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
itemGroups.forEach(itemGroup -> items.forEach(item -> {
if (!couponTemplate.getRangeValues().contains(item.getCid())) {
items.add(item);
}
}));
}
// 判断是否符合条件
int originalTotal = items.stream().mapToInt(PriceProductCalcRespDTO.Item::getPresentTotal).sum(); // 此处，指的是以优惠劵视角的原价
if (originalTotal == 0 || originalTotal < couponCard.getPriceAvailable()) {
throw ServiceExceptionUtil.exception(COUPON_CARD_NOT_MATCH); // TODO 芋艿，这种情况，会出现错误码的提示，无法格式化出来。另外，这块的最佳实践，找人讨论下。
}
// 计算价格
// 获得到优惠信息，进行价格计算
int presentTotal;
if (PreferentialTypeEnum.PRICE.getValue().equals(couponCard.getPreferentialType())) { // 减价
// 计算循环次数。这样，后续优惠的金额就是相乘了
presentTotal = originalTotal - couponCard.getPriceOff();
Assert.isTrue(presentTotal > 0, "计算后，价格为负数：" + presentTotal);
} else if (PreferentialTypeEnum.DISCOUNT.getValue().equals(couponCard.getPreferentialType())) { // 打折
presentTotal = originalTotal * couponCard.getPercentOff() / 100;
if (couponCard.getDiscountPriceLimit() != null // 空，代表不限制优惠上限
&& originalTotal - presentTotal > couponCard.getDiscountPriceLimit()) {
presentTotal = originalTotal - couponCard.getDiscountPriceLimit();
}
} else {
throw new IllegalArgumentException(String.format("优惠劵(%s) 的优惠类型不正确", couponCard.toString()));
}
int discountTotal = originalTotal - presentTotal;
Assert.isTrue(discountTotal > 0, "计算后，不产生优惠：" + discountTotal);
// 按比例，拆分 presentTotal
splitDiscountPriceToItems(items, discountTotal, presentTotal);
// 返回优惠金额
return originalTotal - presentTotal;
}
private void splitDiscountPriceToItems(List<PriceProductCalcRespDTO.Item> items, Integer discountTotal, Integer presentTotal) {
for (int i = 0; i < items.size(); i++) {
PriceProductCalcRespDTO.Item item = items.get(i);
Integer discountPart;
if (i < items.size() - 1) { // 减一的原因，是因为拆分时，如果按照比例，可能会出现.所以最后一个，使用反减
discountPart = (int) (discountTotal * (1.0D * item.getPresentTotal() / presentTotal));
discountTotal -= discountPart;
} else {
discountPart = discountTotal;
}
Assert.isTrue(discountPart > 0, "优惠金额必须大于 0");
item.setDiscountTotal(item.getDiscountTotal() + discountPart);
item.setPresentTotal(item.getBuyTotal() - item.getDiscountTotal());
item.setPresentPrice(item.getPresentTotal() / item.getBuyQuantity());
}
}
}

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归档/promotion-service-project/promotion-service-app/src/main/java/cn/iocoder/mall/promotionservice/service/banner/BannerService.java
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package cn.iocoder.mall.promotionservice.service.banner;
import cn.iocoder.common.framework.exception.util.ServiceExceptionUtil;
import cn.iocoder.common.framework.vo.PageResult;
import cn.iocoder.mall.promotion.api.rpc.banner.dto.*;
import cn.iocoder.mall.promotionservice.convert.banner.BannerConvert;
import cn.iocoder.mall.promotionservice.dal.mysql.dataobject.banner.BannerDO;
import cn.iocoder.mall.promotionservice.dal.mysql.mapper.banner.BannerMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.validation.annotation.Validated;
import javax.validation.Valid;
import java.util.List;
import static cn.iocoder.mall.promotion.api.enums.PromotionErrorCodeConstants.BANNER_NOT_EXISTS;
@Service
@Validated
public class BannerService {
@Autowired
private BannerMapper bannerMapper;
/**
* 获得 Banner 列表
*
* @param listReqDTO Banner 列表查询
* @return Banner 列表
*/
public List<BannerRespDTO> listBanners(BannerListReqDTO listReqDTO) {
List<BannerDO> banners = bannerMapper.selectList(listReqDTO);
return BannerConvert.INSTANCE.convertList(banners);
}
/**
* 获得 Banner 分页
*
* @param bannerPageDTO Banner 分页查询
* @return Banner 分页结果
*/
public PageResult<BannerRespDTO> pageBanner(BannerPageReqDTO bannerPageDTO) {
IPage<BannerDO> bannerPage = bannerMapper.selectPage(bannerPageDTO);
return BannerConvert.INSTANCE.convertPage(bannerPage);
}
/**
* 创建 Banner
*
* @param createReqDTO 创建 Banner 信息
* @return banner
*/
public Integer createBanner(@Valid BannerCreateReqDTO createReqDTO) {
// 插入到数据库
BannerDO bannerDO = BannerConvert.INSTANCE.convert(createReqDTO);
bannerMapper.insert(bannerDO);
// 返回
return bannerDO.getId();
}
/**
* 更新 Banner
*
* @param updateReqDTO 更新 Banner 信息
*/
public void updateBanner(@Valid BannerUpdateReqDTO updateReqDTO) {
// 校验更新的 Banner 是否存在
if (bannerMapper.selectById(updateReqDTO.getId()) == null) {
throw ServiceExceptionUtil.exception(BANNER_NOT_EXISTS);
}
// 更新到数据库
BannerDO updateObject = BannerConvert.INSTANCE.convert(updateReqDTO);
bannerMapper.updateById(updateObject);
}
/**
* 删除 Banner
*
* @param bannerId Banner 编号
*/
public void deleteBanner(Integer bannerId) {
// 校验 Banner 存在
if (bannerMapper.selectById(bannerId) == null) {
throw ServiceExceptionUtil.exception(BANNER_NOT_EXISTS);
}
// 更新到数据库
bannerMapper.deleteById(bannerId);
}
}