太简单的两篇递归循环
orcale 在项目里递归循环实战

先看资产表T_ATOM_ASSET结构

看业务类别表T_ATOM_BUSI_CATEGORY结构

问题出现

页面显示

实际对应的归属业务分类

涉及到oracle递归实战(这里不会如何直接在atomAsset的seelct里面处理递归回显)

直接在实现层看atomAssetMapper和atomBusiCategoryMapper处理(这里转来转去数据格式，不知道有啥简单方法不)
impl

    @Overridepublic PageResult<AtomAsset> queryAll(AtomAssetQueryCriteria criteria, Page<Object> page){IPage<AtomAsset> all = atomAssetMapper.findAll(criteria, page);List<AtomAsset> records = all.getRecords();//        根据每条数据类的busiSort递归向下查找归属业务分类if(records.size() > 0 ){for (int i = 0; i < records.size(); i++) {String busiSort = records.get(i).getBusiSort();
//                逗号分隔字符串截取String[] split = busiSort.split(",");
//                string[] 转List<String>再转Set<String>-----为了去重List<String> strings = new ArrayList<>(Arrays.asList(split));Set<String> taskSet  = new LinkedHashSet<>();taskSet.addAll(strings);
//                记录最终对应的分类名字结果Set<String> taskSetResult  = new LinkedHashSet<>();for(String item : taskSet){
//                    根据分类id获取分类名称(递归向下查找)List<String> subCategory = atomBusiCategoryMapper.findSubCategory(Long.parseLong(item));
//                    根据分类id获取当前自己的分类名称String currentCategoryName = atomBusiCategoryMapper.findCategoryNameByCateforyId(Long.parseLong(item));taskSetResult.addAll(subCategory);taskSetResult.add(currentCategoryName);}
//                set又转成List返回前端records.get(i).setBusiSortName(new ArrayList<>(taskSetResult));}}
//        System.out.println(all);return PageUtil.toPage(all);}

直接看AtomBusiCategoryMapper.xml的小小递归写法

    <select id="findSubCategory" resultType="java.lang.String">select distinct category_namefrom T_ATOM_BUSI_CATEGORYstart with superior_id = #{categotyId}connect by prior category_id = superior_id</select><select id="findCategoryNameByCateforyId" resultType="java.lang.String">select category_namefrom T_ATOM_BUSI_CATEGORYwhere category_id = #{categotyId}</select>