MapStruct

1. 使用

1. 依赖

   <properties>
     <org.projectlombok.version>1.18.10</org.projectlombok.version>
     <org.mapstruct.version>1.3.0.Final</org.mapstruct.version>
   </properties>
   
   <dependency>
     <groupId>org.projectlombok</groupId>
     <artifactId>lombok</artifactId>
     <version>${org.projectlombok.version}</version>
   </dependency>
   <dependency>
     <groupId>org.mapstruct</groupId>
     <artifactId>mapstruct</artifactId>
     <version>${org.mapstruct.version}</version>
   </dependency>
   <dependency>
     <groupId>org.mapstruct</groupId>
     <artifactId>mapstruct-jdk8</artifactId>
     <version>${org.mapstruct.version}</version>
   </dependency>
   <dependency>
     <groupId>org.mapstruct</groupId>
     <artifactId>mapstruct-processor</artifactId>
     <version>${org.mapstruct.version}</version>
   </dependency>
   
   <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-compiler-plugin</artifactId>
     <version>3.8.1</version>
     <configuration>
       <source>11</source>
       <target>11</target>
       <encoding>UTF-8</encoding>
       <annotationProcessorPaths>
         <path>
           <groupId>org.mapstruct</groupId>
           <artifactId>mapstruct-processor</artifactId>
           <version>${org.mapstruct.version}</version>
         </path>
         <path>
           <groupId>org.projectlombok</groupId>
           <artifactId>lombok</artifactId>
           <version>${org.projectlombok.version}</version>
         </path>
       </annotationProcessorPaths>
     </configuration>
   </plugin>
   

2. 使用

   1. 自建实体类、VO、DTO等对象。

   2. 定义映射接口

      @Mapper(componentModel = "spring")
      public interface ArticleMapper {
        @Mappings({
          @Mapping(source = "article.id", target = "id")
        })
        ArticleVo entityToVo(Article article, List<ArticleSortsVo> articleSortsVo, List<ArticleTagsVo> articleTagsVo);
      }
      

   3. 直接运行，会自动生成对应的实现类。

2. 坑

1. No property named "updatedDate" exists in source parameter(s). Did you mean "empty"?
   

   原因：可能Lombok与MapStruct版本不一致，或者是因为Lombok在Mapstruct之后编译导致的问题。经过测试

   <org.projectlombok.version>1.18.10</org.projectlombok.version>
   <org.mapstruct.version>1.3.0.Final</org.mapstruct.version>
   

   是比较好的组合。

2. 别忘了添加plugins中的配置。