java获取树状结构

/**
 * 转成树状结构
 */
public List<DictVO> toTree(List<DictVO> list){
   List<DictVO>treelist=new ArrayList<DictVO>();
   for(DictVO outBean:list) {
      for(DictVO inBean:list) {
         Long outid=outBean.getId();
         Long inpid=inBean.getParentId();
         if(outid.equals(inpid)) {
            List<DictVO>maplist=(ArrayList) outBean.getChildren();
            maplist.add(inBean);
         }
      }
      Long prid=outBean.getParentId();
      if(!Func.isEmpty(prid)) {
         treelist.add(outBean);
      }
   }
   return treelist;
}

/**
 * 递归获取所有子集
 */
/**
 *递归获取树状结构子集
 * @param list
 * @param returnList
 * @return
 */
public List<DictVO>getList(List<DictVO>list,List<DictVO>returnList){
   if(Func.isNotEmpty(list)){
      for(DictVO bean:list){
         List<DictVO>list1=baseMapper.getListByParentId(bean.getId());
         returnList.add(bean);
         if(Func.isNotEmpty(list1)){
            getList(list1,returnList);
         }
      }

   }
   return returnList;
}