转换类的具体使用教程

目录

转换类定义:

具体步骤(针对属性名相同):

如若属性名不同,则应该如何转换:

具体步骤(针对属性名不相同):

转换类定义:

将一个对象的值赋值给另一个对象时(属性名相同),就需要转换类了.

具体步骤(针对属性名相同):

1. 首先创建convert包(专门存储转换类的).
2. 创建接口

package com.sinosoft.springbootplus.office.convert;
 
import com.sinosoft.springbootplus.office.domain.entity.JgjgOffice;
import com.sinosoft.springbootplus.office.vo.JgjgOfficeQueryVo;
import org.mapstruct.Mapper;
import org.mapstruct.factory.Mappers;
 
/**
 *类型转换器
 * @author ljk
 */
@Mapper
public interface JgjgOfficeConvert {
    JgjgOfficeConvert INSTANCE = Mappers.getMapper(JgjgOfficeConvert.class);
 
    /**
     * entity->vo
     * @param jgjgOffice
     * @return
     */
    JgjgOfficeQueryVo jgjgOfficeToJgjgOfficeQueryVo(JgjgOffice jgjgOffice);
}

        3.具体使用

    public JgjgOfficeQueryVo getJgjgOfficeById(Long id){
        JgjgOffice jgjgOfficeById = jgjgOfficeDomain.getJgjgOfficeById(id);
        JgjgOfficeQueryVo jgjgOfficeQueryVo = JgjgOfficeConvert.INSTANCE.jgjgOfficeToJgjgOfficeQueryVo(jgjgOfficeById);
        return jgjgOfficeQueryVo;
    }

如若属性名不同,则应该如何转换:

具体步骤(针对属性名不相同):

        例如:

@Data
@Accessors(chain = true)
@EqualsAndHashCode(callSuper = true)
@ApiModel(value = "JgjgNoticeReceive对象", description = "监管机构系统-收发文-收件人")
public class JgjgNoticeReceive extends BaseEntity {
 
    private static final long serialVersionUID = 1L;
 
 
    @ApiModelProperty(value = "主键", required = true)
    @TableId(value = "id", type = IdType.ID_WORKER)
    private Long id;
 
    @ApiModelProperty(value = "收件人ID")
    private Long receiveId;
 
    @ApiModelProperty(value = "收件人姓名")
    private String receiveName;
 
}

@Data
@Accessors(chain = true)
@EqualsAndHashCode(callSuper = true)
@ApiModel(value = "JgjgPerson对象", description = "监管机构系统-人员管理")
public class JgjgPerson extends BaseEntity {
 
    private static final long serialVersionUID = 1L;
 
    @ApiModelProperty(value = "主键", required = true)
    @TableId(value = "id", type = IdType.ID_WORKER)
    private Long id;
 
    @ApiModelProperty(value = "姓名")
    private String name;
 
    @ApiModelProperty(value = "用户ID")
    private Long userId;
 
}

向以上两种类:     name  对应  receiveName, userId对应receiveId , 并且id 忽略.将如何转换呢?

@Mappings({
            @Mapping(source = "name", target = "receiveName"),
            @Mapping(source = "userId", target = "receiveId"),
            @Mapping(target = "id", ignore = true)
    })
    JgjgNoticeReceive jgjgPerson2JgjgNoticeReceive(JgjgPerson jgjgPerson);

source里面填写的是要转换的属性名,,target里面填的的是被转换后的属性名.ignore指的是忽略,id不做转换. 

以上@Mappings注解和@Mapping注解则可以完成类里面不同属性名之间的相互转换.