企业标准 DTO 传参 + Controller + Service + 拷贝工具类完整版

1）先写两个 DTO（新增、修改）

ShopSaveDTO.java（新增用）

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import lombok.Data;
import java.math.BigDecimal;

@Data
public class ShopSaveDTO {
    private String name;
    private String address;
    private Long typeId;
    private String phone;
    private BigDecimal avgPrice;
}

ShopUpdateDTO.java（修改用）

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import lombok.Data;
import java.math.BigDecimal;

@Data
public class ShopUpdateDTO {
    private Long id;          // 修改必须传id
    private String name;
    private String address;
    private Long typeId;
    private String phone;
    private BigDecimal avgPrice;
}

2）Controller（完整，接收 DTO）

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import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;

@RestController
@RequestMapping("/shop")
public class ShopController {

    @Resource
    private ShopService shopService;

    // 查询
    @GetMapping("/{id}")
    public Result queryById(@PathVariable Long id) {
        return shopService.queryById(id);
    }

    // 新增（接收 ShopSaveDTO）
    @PostMapping
    public Result saveShop(@RequestBody ShopSaveDTO dto) {
        return shopService.saveShop(dto);
    }

    // 修改（接收 ShopUpdateDTO）
    @PutMapping
    public Result updateShop(@RequestBody ShopUpdateDTO dto) {
        return shopService.updateShop(dto);
    }

    // 删除
    @DeleteMapping("/{id}")
    public Result deleteShop(@PathVariable Long id) {
        return shopService.deleteShop(id);
    }
}

3）Service 接口

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import com.baomidou.mybatisplus.extension.service.IService;

public interface ShopService extends IService<Shop> {
    Result queryById(Long id);
    Result saveShop(ShopSaveDTO dto);
    Result updateShop(ShopUpdateDTO dto);
    Result deleteShop(Long id);
}

4）ServiceImpl（完整 + BeanUtils.copyProperties）

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import org.springframework.beans.BeanUtils;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.data.redis.core.StringRedisTemplate;

@Service
public class ShopServiceImpl extends ServiceImpl<ShopMapper, Shop> implements ShopService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Resource
    private CacheClient cacheClient;

    private static final String CACHE_SHOP_KEY = "cache:shop:";

    // ====================== 查询（你原来的逻辑）======================
    @Override
    public Result queryById(Long id) {
        Shop shop = cacheClient.queryWithPassThrough(
                CACHE_SHOP_KEY,
                id,
                Shop.class,
                this::getById,
                30L,
                java.util.concurrent.TimeUnit.MINUTES
        );

        if (shop == null) {
            return Result.fail("店铺不存在");
        }
        return Result.ok(shop);
    }

    // ====================== 新增 ======================
    @Override
    @Transactional
    public Result saveShop(ShopSaveDTO dto) {
        Shop shop = new Shop();
        BeanUtils.copyProperties(dto, shop); // DTO → 实体
        save(shop);
        return Result.ok();
    }

    // ====================== 修改 ======================
    @Override
    @Transactional
    public Result updateShop(ShopUpdateDTO dto) {
        Shop shop = new Shop();
        BeanUtils.copyProperties(dto, shop); // DTO → 实体
        updateById(shop);

        // 删除缓存
        stringRedisTemplate.delete(CACHE_SHOP_KEY + dto.getId());

        return Result.ok();
    }

    // ====================== 删除 ======================
    @Override
    @Transactional
    public Result deleteShop(Long id) {
        removeById(id);
        stringRedisTemplate.delete(CACHE_SHOP_KEY + id);
        return Result.ok();
    }
}