Spring Boot 配置MapStruct（实体映射工具）

妖狐艹你老母 2023-10-01 18:37 5阅读 0赞

## 1 MapStruct ##

MapStruct 就是这样的一个属性映射工具，只需要定义一个 Mapper 接口，MapStruct 就会自动实现这个映射接口，避免了复杂繁琐的映射实现。

## 2 Maven依赖 ##

<dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            
            <dependency>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-jdk8</artifactId>
                <version>1.3.0.Final</version>
            </dependency>
            <dependency>
                <groupId>org.mapstruct</groupId>
                <artifactId>mapstruct-processor</artifactId>
                <version>1.3.0.Final</version>
            </dependency>

## 3 实体类 ##

### 3.1 UserEntity ###

用户信息实体类。

package com.entity;
    
    import lombok.Data;
    import org.springframework.stereotype.Component;
    
    /**
     * 用户信息实体类
     */
    @Component
    @Data
    public class UserEntity {
        private String username;
        private String password;
        private int sex;
    }

### 3.2 UserVO ###

用户信息显示类。

package com.vo;
    
    import com.entity.UserEntity;
    import lombok.Data;
    import org.springframework.stereotype.Component;
    
    /**
     * 用户信息显示类
     */
    @Component
    @Data
    public class UserVO extends UserEntity {
        private String sexName;
    }

## 4 UserVOEntityMapStruct ##

用户信息Vo和Entity转换类。

package com.mapstruct;
    
    import com.entity.UserEntity;
    import com.vo.UserVO;
    import org.mapstruct.Mapper;
    import org.mapstruct.factory.Mappers;
    
    /**
     * 用户信息
     * Vo和Entity转换类
     */
    @Mapper
    public interface UserVOEntityMapStruct {
        UserVOEntityMapStruct INSTANCE = Mappers.getMapper(UserVOEntityMapStruct.class);
    
        UserVO toUserVO(UserEntity userEntity);
    
        UserEntity toUserEntity(UserVO userVO);
    }

## 5 调试代码 ##

package com.controller;
    
    import com.entity.UserEntity;
    import com.mapstruct.UserVOEntityMapStruct;
    import com.vo.UserVO;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestBody;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class MapStructController {
    
        @PostMapping("/testMapStruct")
        public UserVO testMapStruct(@RequestBody UserEntity userEntity) {
            UserVO userVO = UserVOEntityMapStruct.INSTANCE.toUserVO(userEntity);
            userVO.setSexName(userVO.getSex() == 1 ? "男" : "女");
            return userVO;
        }
    }

## 6 调试结果 ##

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5pet5Lic5oCq_size_20_color_FFFFFF_t_70_g_se_x_16][]

[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5pet5Lic5oCq_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/35f0eda8865d438c843778666710cb51.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5pet5Lic5oCq,size_20,color_FFFFFF,t_70,g_se,x_16