mapstruct学习笔记

1. 引入依赖

    <dependencies>
     <dependency>
           <groupId>org.mapstructgroupId>
           <artifactId>mapstructartifactId>
           <version>1.4.2.Finalversion>
       dependency>
   
       <dependency>
           <groupId>org.mapstructgroupId>
           <artifactId>mapstruct-processorartifactId>
           <version>1.4.2.Finalversion>
       dependency>
   
       <dependency>
           <groupId>org.projectlombokgroupId>
           <artifactId>lombokartifactId>
           <version>1.18.20version>
       dependency>
   
        
       <dependency>
           <groupId>javax.annotationgroupId>
           <artifactId>javax.annotation-apiartifactId>
           <version>1.3.2version>
       dependency>
    dependencies>
   

2. 添加plugin

   <plugin>
       <groupId>org.apache.maven.pluginsgroupId>
       <artifactId>maven-compiler-pluginartifactId>
       <version>3.8.1version>
       <configuration>
           <source>1.8source>
           <target>1.8target>
           <annotationProcessorPaths>
               <path>
                   <groupId>org.projectlombokgroupId>
                   <artifactId>lombokartifactId>
                   <version>1.18.20version>
               path>
               <path>
                   <groupId>org.mapstructgroupId>
                   <artifactId>mapstruct-processorartifactId>
                   <version>1.4.2.Finalversion>
               path>
           annotationProcessorPaths>
       configuration>
   plugin>
   

3. 编写do与bo实体

   // do 实体
   @Data // 新增
   @Accessors(chain = true)
   public class UserDO {
       // 用户编号
       private Integer id;
       // 用户名
       private String username;
       // 密码
       private String password;
   }
   // bo 实体
   @Data // 新增
   @Accessors(chain = true)
   public class UserBO {
      // 用户编号
      private Integer id;
      // 用户名
      private String username;
      // 密码
      private String password;
   }
   

4. 编写convertor转换类

   @Mapper // <1>
   public interface UserConvert {
       UserConvert INSTANCE = Mappers.getMapper(UserConvert.class); // <2>
   
       UserBO convert(UserDO userDO);
   }
   

5. 单元测试

   @Slf4j
   public class UserBOTest {
       @Test
       public void hello() {
           // 创建 UserDO 对象
           UserDO userDO = new UserDO()
                   .setId(1)
                   .setUsername("yudaoyuanma")
                   .setPassword("buzhidao");
           //  进行转换
           UserBO userBO = UserConvert.INSTANCE.convert(userDO);
           System.out.println(userBO.getId());
           System.out.println(userBO.getUsername());
           System.out.println(userBO.getPassword());
       }
   }
   

6. 文档：https://mapstruct.org/documentation/stable/reference/html