Spring Boot 配置MapStruct（实体映射工具）-蒲公英云

Spring Boot 配置MapStruct（实体映射工具）

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>
        <!-- mapstruct 实体映射工具 -->
        <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;
    }
}