增加 swagger 提供 API 文档功能

增加 mapstruct 提供 Bean 之间的复制

product/pom.xml

@@ -13,7 +13,6 @@
     <packaging>pom</packaging>
     <modules>
         <module>product-application</module>
-        <module>product-service</module>
         <module>product-service-api</module>
     </modules>
 

product/product-application/pom.xml

@@ -11,6 +11,10 @@
 
     <artifactId>product-rest</artifactId>
 
+    <properties>
+        <org.mapstruct.version>1.3.0.Final</org.mapstruct.version>
+    </properties>
+
     <dependencies>
         <dependency>
             <groupId>cn.iocoder.mall</groupId>
@@ -60,6 +64,46 @@
             <version>2.12.0</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.mapstruct</groupId>
+            <artifactId>mapstruct</artifactId> <!-- use mapstruct-jdk8 for Java 8 or higher -->
+            <version>${org.mapstruct.version}</version>
+        </dependency>
+
+
+        <dependency>
+            <groupId>io.springfox</groupId>
+            <artifactId>springfox-swagger2</artifactId>
+            <version>2.9.2</version>
+        </dependency>
+        <dependency>
+            <groupId>io.springfox</groupId>
+            <artifactId>springfox-swagger-ui</artifactId>
+            <version>2.9.2</version>
+        </dependency>
+
     </dependencies>
 
+    <build>
+        <plugins>
+            <!-- 提供给 mapstruct 使用 -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <source>1.8</source> <!-- or higher, depending on your project -->
+                    <target>1.8</target> <!-- or higher, depending on your project -->
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.mapstruct</groupId>
+                            <artifactId>mapstruct-processor</artifactId>
+                            <version>${org.mapstruct.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

product/product-application/src/main/java/cn/iocoder/mall/product/ProductApplication.java

@@ -0,0 +1,13 @@
+package cn.iocoder.mall.product;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ProductApplication {
+
+	public static void main(String[] args) {
+	    SpringApplication.run(ProductApplication.class, args);
+	}
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/ProductRestApplication.java

@@ -1,20 +0,0 @@
-package cn.iocoder.mall.product;
-
-import org.mybatis.spring.annotation.MapperScan;
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.ConfigurableApplicationContext;
-
-import javax.sql.DataSource;
-
-@SpringBootApplication
-@MapperScan("cn.iocoder.mall.product.dao") // 扫描对应的 Mapper 接口
-public class ProductRestApplication {
-
-	public static void main(String[] args) {
-		ConfigurableApplicationContext ctx = SpringApplication.run(ProductRestApplication.class, args);
-		DataSource ds = ctx.getBean(DataSource.class);
-		System.out.println(ds);
-	}
-
-}

product/product-application/src/main/java/cn/iocoder/mall/product/bo/ProductCategoryBO.java

@@ -0,0 +1,70 @@
+package cn.iocoder.mall.product.bo;
+
+/**
+ * 商品分类 BO
+ */
+public class ProductCategoryBO {
+
+    /**
+     * 分类编号
+     */
+    private Integer id;
+    /**
+     * 父分类编号
+     *
+     * 如果不存在父级，则 pid = 0 。
+     */
+    private Integer pid;
+    /**
+     * 名称
+     */
+    private String name;
+    /**
+     * 分类图片
+     */
+    private String picUrl;
+    /**
+     * 排序值
+     */
+    private Integer sort;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getPid() {
+        return pid;
+    }
+
+    public void setPid(Integer pid) {
+        this.pid = pid;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getPicUrl() {
+        return picUrl;
+    }
+
+    public void setPicUrl(String picUrl) {
+        this.picUrl = picUrl;
+    }
+
+    public Integer getSort() {
+        return sort;
+    }
+
+    public void setSort(Integer sort) {
+        this.sort = sort;
+    }
+}

product/product-application/src/main/java/cn/iocoder/mall/product/config/DatabaseConfiguration.java

@@ -0,0 +1,14 @@
+package cn.iocoder.mall.product.config;
+
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@Configuration
+@MapperScan("cn.iocoder.mall.product.dao") // 扫描对应的 Mapper 接口
+@EnableTransactionManagement(proxyTargetClass = true) // 启动事务管理。为什么使用 proxyTargetClass 参数，参见 https://blog.csdn.net/huang_550/article/details/76492600
+public class DatabaseConfiguration {
+
+    // 数据源，使用 HikariCP
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/config/GlobalExceptionHandler.java

@@ -0,0 +1,36 @@
+package cn.iocoder.mall.product.config;
+
+import cn.iocoder.mall.product.constants.ErrorCodeEnum;
+import cn.iocoder.mall.product.exception.ServiceException;
+import cn.iocoder.mall.product.vo.RestResult;
+import org.springframework.web.bind.MissingServletRequestParameterException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import javax.servlet.http.HttpServletRequest;
+
+@ControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ResponseBody
+    @ExceptionHandler(value = ServiceException.class)
+    public RestResult serviceExceptionHandler(HttpServletRequest req, Exception e) {
+        ServiceException ex = (ServiceException) e;
+        return RestResult.error(ex.getCode(), ex.getMessage());
+    }
+
+    @ResponseBody
+    @ExceptionHandler(value = Exception.class)
+    public RestResult resultExceptionHandler(HttpServletRequest req, Exception e) {
+        // TODO 异常日志
+        e.printStackTrace();
+        // TODO 翻译不同的异常
+        if (e instanceof MissingServletRequestParameterException) {
+            return RestResult.error(ErrorCodeEnum.MISSING_REQUEST_PARAM_ERROR.getCode(), ErrorCodeEnum.MISSING_REQUEST_PARAM_ERROR.getMessage());
+        }
+        // 返回
+        return RestResult.error(ErrorCodeEnum.SYS_ERROR.getCode(), ErrorCodeEnum.SYS_ERROR.getMessage());
+    }
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/config/GlobalResponseBodyAdvice.java

@@ -0,0 +1,26 @@
+package cn.iocoder.mall.product.config;
+
+import cn.iocoder.mall.product.vo.RestResult;
+import org.springframework.core.MethodParameter;
+import org.springframework.http.MediaType;
+import org.springframework.http.server.ServerHttpRequest;
+import org.springframework.http.server.ServerHttpResponse;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
+
+//@ControllerAdvice
+public class GlobalResponseBodyAdvice implements ResponseBodyAdvice {
+
+    @Override
+    public boolean supports(MethodParameter returnType, Class converterType) {
+        return true; // TODO 芋艿，未来，这里可以剔除掉一些，需要特殊返回的接口
+    }
+
+    @Override
+    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
+        if (body instanceof RestResult) {
+            return body;
+        }
+        return RestResult.ok(body);
+    }
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/config/MVCConfiguration.java

@@ -0,0 +1,23 @@
+package cn.iocoder.mall.product.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@EnableWebMvc
+@Configuration
+public class MVCConfiguration implements WebMvcConfigurer {
+
+//    @Autowired
+//    private SecurityInterceptor securityInterceptor;
+
+//    @Reference
+//    private OAuth2Service oauth2Service;
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+//        registry.addInterceptor(securityInterceptor);
+    }
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/config/SwaggerConfiguration.java

@@ -0,0 +1,36 @@
+package cn.iocoder.mall.product.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import springfox.documentation.builders.ApiInfoBuilder;
+import springfox.documentation.builders.PathSelectors;
+import springfox.documentation.builders.RequestHandlerSelectors;
+import springfox.documentation.service.ApiInfo;
+import springfox.documentation.spi.DocumentationType;
+import springfox.documentation.spring.web.plugins.Docket;
+import springfox.documentation.swagger2.annotations.EnableSwagger2;
+
+@Configuration
+@EnableSwagger2
+public class SwaggerConfiguration {
+
+    @Bean
+    public Docket createRestApi() {
+        return new Docket(DocumentationType.SWAGGER_2)
+                .apiInfo(apiInfo())
+                .select()
+                .apis(RequestHandlerSelectors.basePackage("cn.iocoder.mall.product.controller"))
+                .paths(PathSelectors.any())
+                .build();
+    }
+
+    private ApiInfo apiInfo() {
+        return new ApiInfoBuilder()
+                .title("商品子系统")
+                .description("商品子系统")
+                .termsOfServiceUrl("http://www.iocoder.cn")
+                .version("1.0.0")
+                .build();
+    }
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/constants/ErrorCodeEnum.java

@@ -0,0 +1,32 @@
+package cn.iocoder.mall.product.constants;
+
+/**
+ * 错误码枚举类
+ *
+ * 系统级异常，使用 2-001-000-000 段
+ */
+public enum ErrorCodeEnum {
+
+    SYS_ERROR(2001001000, "服务端发生异常"),
+    MISSING_REQUEST_PARAM_ERROR(2001001001, "参数缺失"),
+
+    ;
+
+    private final int code;
+    private final String message;
+
+    ErrorCodeEnum(int code, String message) {
+        this.code = code;
+        this.message = message;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+    ;
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/controller/user/ProductCategoryController.java

@@ -1,22 +1,34 @@
 package cn.iocoder.mall.product.controller.user;
 
+import cn.iocoder.mall.product.convert.ProductCategoryConvert;
+import cn.iocoder.mall.product.service.ProductCategoryService;
 import cn.iocoder.mall.product.vo.ProductCategoryVO;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
-import java.util.ArrayList;
 import java.util.List;
 
 @RestController
 @RequestMapping("user/product/category")
+@Api("商品分类")
 public class ProductCategoryController {
 
-    // TODO 获得父编号为 id 的分类们 后面，使用 swagger 注释
+    @Autowired
+    private ProductCategoryService productCategoryService;
+
     @GetMapping
-    public List<ProductCategoryVO> list(@RequestParam("id") Integer id) {
+    @ApiOperation("获得指定编号下的子分类的数组")
-        return new ArrayList<>();
+    @ApiImplicitParam(name = "pid", value = "指定分类编号", required = true)
+    public List<ProductCategoryVO> list(@RequestParam("pid") Integer pid) {
+        return ProductCategoryConvert.INSTANCE.convertToVO(
+                productCategoryService.getListByPid(pid)
+        );
     }
 
 }

product/product-application/src/main/java/cn/iocoder/mall/product/convert/ProductCategoryConvert.java

@@ -0,0 +1,27 @@
+package cn.iocoder.mall.product.convert;
+
+import cn.iocoder.mall.product.bo.ProductCategoryBO;
+import cn.iocoder.mall.product.dataobject.ProductCategoryDO;
+import cn.iocoder.mall.product.vo.ProductCategoryVO;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+import java.util.List;
+
+@Mapper
+public interface ProductCategoryConvert {
+
+    ProductCategoryConvert INSTANCE = Mappers.getMapper(ProductCategoryConvert.class);
+
+    @Mappings({})
+    ProductCategoryBO convertToBO(ProductCategoryDO category);
+
+    List<ProductCategoryBO> convertToBO(List<ProductCategoryDO> categoryList);
+
+    @Mappings({})
+    ProductCategoryVO convertToVO(ProductCategoryBO category);
+
+    List<ProductCategoryVO> convertToVO(List<ProductCategoryBO> categoryList);
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/convert/ProductSpuConvert.java

@@ -0,0 +1,17 @@
+package cn.iocoder.mall.product.convert;
+
+import cn.iocoder.mall.product.bo.ProductSpuBO;
+import cn.iocoder.mall.product.dataobject.ProductSpuDO;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mappings;
+import org.mapstruct.factory.Mappers;
+
+@Mapper
+public interface ProductSpuConvert {
+
+    ProductSpuConvert INSTANCE = Mappers.getMapper(ProductSpuConvert.class);
+
+    @Mappings({})
+    ProductSpuBO convert(ProductSpuDO spu);
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/dao/ProductCategoryMapper.java

@@ -0,0 +1,15 @@
+package cn.iocoder.mall.product.dao;
+
+import cn.iocoder.mall.product.dataobject.ProductCategoryDO;
+import org.apache.ibatis.annotations.Param;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface ProductCategoryMapper {
+
+    List<ProductCategoryDO> selectListByPidAndStatusOrderBySort(@Param("pid") Integer pid,
+                                                                @Param("status") Integer status);
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/dataobject/ProductCategoryDO.java

@@ -7,6 +7,8 @@ import java.util.Date;
  */
 public class ProductCategoryDO {
 
+    public static final Integer STATUS_ENABLE = 1;
+
     /**
      * 分类编号
      */
@@ -28,7 +30,7 @@ public class ProductCategoryDO {
     /**
      * 分类图片
      */
-    private String picURL;
+    private String picUrl;
     /**
      * 排序值
      */
@@ -49,4 +51,76 @@ public class ProductCategoryDO {
      */
     private Integer status;
 
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getPid() {
+        return pid;
+    }
+
+    public void setPid(Integer pid) {
+        this.pid = pid;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public String getPicUrl() {
+        return picUrl;
+    }
+
+    public void setPicUrl(String picUrl) {
+        this.picUrl = picUrl;
+    }
+
+    public Integer getSort() {
+        return sort;
+    }
+
+    public void setSort(Integer sort) {
+        this.sort = sort;
+    }
+
+    public Date getCreateTime() {
+        return createTime;
+    }
+
+    public void setCreateTime(Date createTime) {
+        this.createTime = createTime;
+    }
+
+    public Date getUpdateTime() {
+        return updateTime;
+    }
+
+    public void setUpdateTime(Date updateTime) {
+        this.updateTime = updateTime;
+    }
+
+    public Integer getStatus() {
+        return status;
+    }
+
+    public void setStatus(Integer status) {
+        this.status = status;
+    }
+
 }

product/product-application/src/main/java/cn/iocoder/mall/product/exception/ServiceException.java

@@ -0,0 +1,46 @@
+package cn.iocoder.mall.product.exception;
+
+/**
+ * 服务异常
+ *
+ * 参考 https://www.kancloud.cn/onebase/ob/484204 文章
+ *
+ * 一共 10 位，分成四段
+ *
+ * 第一段，1 位，类型
+ *      1 - 业务级别异常
+ *      2 - 系统级别异常
+ * 第二段，3 位，系统类型
+ *      001 - 用户系统
+ *      002 - 商品系统
+ *      003 - 订单系统
+ *      004 - 支付系统
+ *      005 - 优惠劵系统
+ *      ... - ...
+ * 第三段，3 位，模块
+ *      不限制规则。
+ *      一般建议，每个系统里面，可能有多个模块，可以再去做分段。以用户系统为例子：
+ *          001 - OAuth2 模块
+ *          002 - User 模块
+ *          003 - MobileCode 模块
+ * 第四段，3 位，错误码
+ *       不限制规则。
+ *       一般建议，每个模块自增。
+ */
+public class ServiceException extends RuntimeException {
+
+    /**
+     * 错误码
+     */
+    private final Integer code;
+
+    public ServiceException(Integer code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+    public Integer getCode() {
+        return code;
+    }
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/service/ProductCategoryService.java

@@ -0,0 +1,24 @@
+package cn.iocoder.mall.product.service;
+
+import cn.iocoder.mall.product.bo.ProductCategoryBO;
+import cn.iocoder.mall.product.convert.ProductCategoryConvert;
+import cn.iocoder.mall.product.dao.ProductCategoryMapper;
+import cn.iocoder.mall.product.dataobject.ProductCategoryDO;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service // 实际上不用添加。添加的原因是，必须 Spring 报错提示
+//@com.alibaba.dubbo.config.annotation.Service
+public class ProductCategoryService {
+
+    @Autowired
+    private ProductCategoryMapper productCategoryMapper;
+
+    public List<ProductCategoryBO> getListByPid(Integer pid) {
+        List<ProductCategoryDO> categoryList = productCategoryMapper.selectListByPidAndStatusOrderBySort(pid, ProductCategoryDO.STATUS_ENABLE);
+        return ProductCategoryConvert.INSTANCE.convertToBO(categoryList);
+    }
+
+}

product/product-application/src/main/java/cn/iocoder/mall/product/service/ProductSpuService.java

@@ -1,6 +1,7 @@
 package cn.iocoder.mall.product.service;
 
 import cn.iocoder.mall.product.bo.ProductSpuBO;
+import cn.iocoder.mall.product.convert.ProductSpuConvert;
 import cn.iocoder.mall.product.dao.ProductSpuMapper;
 import cn.iocoder.mall.product.dataobject.ProductSpuDO;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -15,9 +16,8 @@ public class ProductSpuService implements cn.iocoder.mall.product.service.api.Pr
 
     public ProductSpuBO getProductSpu(Integer id) {
         ProductSpuDO productSpuDO = productSpuDAO.selectById(id);
-        ProductSpuBO productSpuBO = new ProductSpuBO(); // TODO 芋艿，后面改下
+        // 转换成 BO
-        productSpuBO.setId(productSpuDO.getId());
+        return ProductSpuConvert.INSTANCE.convert(productSpuDO);
-        return productSpuBO;
     }
 
 }

product/product-application/src/main/java/cn/iocoder/mall/product/vo/ProductCategoryVO.java

@@ -1,4 +1,40 @@
 package cn.iocoder.mall.product.vo;
 
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+@ApiModel("商品分类")
 public class ProductCategoryVO {
+
+    @ApiModelProperty(value = "分类编号", required = true, example = "1")
+    private Integer id;
+    @ApiModelProperty(value = "分类名", required = true, example = "手机")
+    private String name;
+    @ApiModelProperty(value = "分类图片", notes = "一般情况下，只有根分类才有图片", example = "http://www.iocoder.cn/images/common/wechat_mp_2017_07_31_bak.jpg")
+    private String picUrl;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getPicUrl() {
+        return picUrl;
+    }
+
+    public void setPicUrl(String picUrl) {
+        this.picUrl = picUrl;
+    }
+
 }

product/product-application/src/main/java/cn/iocoder/mall/product/vo/RestResult.java

@@ -0,0 +1,56 @@
+package cn.iocoder.mall.product.vo;
+
+public class RestResult {
+
+    /**
+     * 错误码
+     */
+    private Integer code;
+    /**
+     * 错误提示
+     */
+    private String message;
+    /**
+     * 返回数据
+     */
+    private Object data;
+
+    public static RestResult error(Integer code, String message) {
+        RestResult result = new RestResult();
+        result.code = code;
+        result.message = message;
+        return result;
+    }
+
+    public static RestResult ok(Object data) {
+        RestResult result = new RestResult();
+        result.code = 0;
+        result.data = data;
+        result.message = "";
+        return result;
+    }
+
+    public Integer getCode() {
+        return code;
+    }
+
+    public void setCode(Integer code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public Object getData() {
+        return data;
+    }
+
+    public void setData(Object data) {
+        this.data = data;
+    }
+}

product/product-application/src/main/resources/mybatis/mapper/ProductCategoryMapper.xml

@@ -1,12 +1,15 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
-<mapper namespace="cn.iocoder.mall.product.dao.ProductSpuMapper">
+<mapper namespace="cn.iocoder.mall.product.dao.ProductCategoryMapper">
 
-    <select id="selectById" parameterType="Integer" resultType="ProductSpuDO">
+    <select id="selectListByPidAndStatusOrderBySort" resultType="ProductCategoryDO">
         SELECT
-          id
+          id, name, pic_url, sort
-        FROM product_spu
+        FROM product_category
-        WHERE id = #{id}
+        WHERE pid = #{pid}
+        AND status = #{status}
+        ORDER BY sort ASC
     </select>
 
+
 </mapper>

product/product-application/src/main/resources/mybatis/mapper/ProductSkuMapper.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="cn.iocoder.mall.product.dao.ProductSpuMapper">
+
+    <select id="selectById" parameterType="Integer" resultType="ProductSpuDO">
+        SELECT
+          id
+        FROM product_spu
+        WHERE id = #{id}
+    </select>
+
+</mapper>