mapstruct列表到列表

Question

我使用的是mapstruct 1.4.2.final。我有一个这样的问题：

Business1 id有许多Business2 id关系。我想像RelationDTO一样使用DTO来记录。

Class RelationDTO {
    private Long id;
    private Long business1Id;
    private Long business2Id;
    private String createUser;
    private LocalDateTime createTime;
}

   @Mappings({
        @Mapping(source = "business1Id", target = "business1Id"),
        @Mapping(source = "createUser", target = "createUser"),
        @Mapping(source = "createTime", target = "createTime")
})
List<RelationDTO> converteTo(List<Long> business2IdList, Long business1Id, String createUser, LocalDateTime createTime);
   

谢谢你的留言。

Answer 1

我将尝试用collection方法的默认实现来解决这个问题，并添加一个映射对象的方法。

@Mapping(source = "business1Id", target = "business1Id")
@Mapping(source = "business2Id", target = "business2Id")
@Mapping(source = "createUser", target = "createUser")
@Mapping(source = "createTime", target = "createTime")
RelationDTO convertToRelationDto(Long business2Id, Long business1Id, String createUser, LocalDateTime createTime);

default List<RelationDTO> convertToRelationsDto(List<Long> business2IdList, Long business1Id, String createUser, LocalDateTime createTime) {
    List<RelationDTO> relations = new ArrayList<RelationDTO>();

    if (CollectionUtils.isEmpty(business2IdList)) {
        return relations;
    }

    for (Long business2Id : business2IdList) {
        relations.add(convertToRelationDto(business2Id, business1Id, createUser, createTime);
    }
}