代码查看总结

查询多级结构。
<resultMap />
</resultMap>

<!--根据ID获取下级信息-->
<select >
  select * from t_tags_library where pid=#{id} and status=0
</select>

/**
 * 标签子级  TagsLibraryVo
*/

private List<TagsLibraryVo> children = new ArrayList<TagsLibraryVo>();


public List<TagsLibraryVo> getChildren() {
    return children;
}

public void setChildren(List<TagsLibraryVo> children) {
    this.children = children;
}

判断对象是否为空

Optional.ofNullable(tagsLibrary).orElseThrow(() -> new SPIException(NOT_INFORMATION));

异常

throw new SPIException(DELETE_EXIS_SUB_LEVEL);

controller
修改返回int

public Integer delTagsLibrary

返回list

List<TagsLibraryDto>

添加返回对象

TagsLibrary

list转换成分页类型对象 PageResult

public static Type<PageInfo<OperateMessage>> PAGE_OPERATEMESSAGE_A = new TypeBuilder<PageInfo<OperateMessage>>() {}.build();
public static Type<PageResult<OperateMessage>> PAGE_OPERATEMESSAGE_B = new TypeBuilder<PageResult<OperateMessage>>() {}.build();

PageInfo<OperateMessage> pageInfo = new PageInfo<>(mList);
PageResult<OperateMessage> pageResult = mapperFacade.map(pageInfo,PAGE_OPERATEMESSAGE_A,PAGE_OPERATEMESSAGE_B);
return pageResult;