模型之间相互转换

使用 MapStruct

1.以maven形式添加

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

 <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>

2.举例： UserEntity 转换成UserVO(不包含password)

创建映射Mapper

@Mapper
public interface ModelMapper {
    UserVO covertVo(UserEntity userEntity);
}


   ModelMapper mapper = Mappers.getMapper(ModelMapper.class);
   UserVO userVO = mapper.covertVo(userEntity);

不同字段映射

@Data
public class UserEntity {
    private Long id ;
    private String username;
    private String password;
    private String nickname;

}
@Data
public class UserVO {
    private Long id ;
    private String username;
    private String nick;
}

映射文件编辑

@Mapper
public interface ModelMapper {
    
    @Mapping(source = "nickname" , target = "nick")
    UserVO covertVo(UserEntity userEntity);
}

多个

@Mapper
public interface ModelMapper {

    @Mapping(source = "Id" , target = "id")
    @Mapping(source = "nickname" , target = "nick")
    UserVO covertVo(UserEntity userEntity);
}


@Mapper
public interface ModelMapper {

    @Mappings({
            @Mapping(source = "Id", target = "id"),
            @Mapping(source = "nickname", target = "nick")
    })
    UserVO covertVo(UserEntity userEntity);
}