最简单的组织树

/**保存部门层级名称**/
public void saveDeptPathName(List<Department> departmentLists){
    if(!StringUtils.isEmpty(departmentLists)&&departmentLists.size()>0){
        for (Department depts:departmentLists) {
            ArrayList<String> pathIds =new ArrayList<>();
            ArrayList<String> pathNames =new ArrayList<>();
            getDeptNames(departmentLists,depts.getDingtalkId(),pathIds,pathNames);
            Collections.reverse(pathNames);
            String pathName = org.apache.commons.lang3.StringUtils.join(pathNames, "-");
            Collections.reverse(pathIds);
            String pathids = org.apache.commons.lang3.StringUtils.join(pathIds, ",");
            jpaQueryFactory.update(DEPARTMENT)
                    .set(DEPARTMENT.pathName,pathName)
                    .set(DEPARTMENT.path,pathids)
                    .where(DEPARTMENT.id.eq(depts.getId()))
                    .execute();
        }
    }
}
/**获取部门名称**/
public void getDeptNames(List<Department> departmentLists,Long dingtalkId,ArrayList<String> pathIds,ArrayList<String> pathNames){
    Department department = departmentLists.stream().filter(x -> x.getDingtalkId().longValue() == dingtalkId.longValue())
            .collect(Collectors.toList()).get(0);
    if(!StringUtils.isEmpty(department)){
        pathIds.add(department.getId() + "");
        pathNames.add(department.getName());
        if(!StringUtils.isEmpty(department.getDingtalkParentid())){
            getDeptNames(departmentLists, department.getDingtalkParentid(),pathIds,pathNames);
        }
    }
}

/**保存部门父级id**/
public void saveDeptPid(List<Department> departmentLists){
   if(!StringUtils.isEmpty(departmentLists)&&departmentLists.size()>0){
       for (Department dep:departmentLists) {
           long pid = 0;
           if (!StringUtils.isEmpty(dep.getDingtalkParentid())) {
               Department department = departmentLists.stream()
               .filter(x -> x.getDingtalkId().longValue() == dep.getDingtalkParentid().longValue())
               .collect(Collectors.toList()).get(0);
               if (!StringUtils.isEmpty(department)) {
                   pid = department.getId();
               }
           }
           jpaQueryFactory.update(DEPARTMENT)
                   .set(DEPARTMENT.parentId,pid)
                   .where(DEPARTMENT.id.eq(dep.getId()))
                   .execute();
       }
   }

}

/***
     * 来源分类树列表
     * @return
     */
    @Override
    public List<SourceTypeTreeDto> list() {
        List<SourceTypeTreeDto> all = this.all();
        List<SourceTypeTreeDto> sourceTypeTreeDtoList = new ArrayList<>();
        this.digui(0l, all, sourceTypeTreeDtoList);
        return sourceTypeTreeDtoList;
    }

    private List<SourceTypeTreeDto> all() {
        return this.jpaQueryFactory.selectFrom(Q_SOURCE_TYPE).
                where(
                        Q_SOURCE_TYPE.corpId.eq(EmployeeContext.get().getCorpId()),
                        Q_SOURCE_TYPE.state.eq(SourceTypeState.NORMAL)
                ).fetch().
                stream().map(res -> BeanPlusUtils.copyPropertiesPlus(res, new SourceTypeTreeDto())).collect(Collectors.toList());
    }

    private void digui(Long parentId, List<SourceTypeTreeDto> all, List<SourceTypeTreeDto> sourceTypeTreeDtoList) {
/**jdk1.8**/
        List<SourceTypeTreeDto> child = all.stream().filter(x -> x.getParentId().longValue() == parentId.longValue()).collect(Collectors.toList());
        if (child.size() > 0) {
            if (parentId == 0l) {
                for (SourceTypeTreeDto dto : child) {
                    dto.setChildren(new ArrayList<>());
                    sourceTypeTreeDtoList.add(dto);
                    this.digui(dto.getId(), all, sourceTypeTreeDtoList);
                }
            } else {
                SourceTypeTreeDto parent = all.stream().filter(x -> x.getId().longValue() == parentId.longValue()).collect(Collectors.toList()).get(0);
                parent.setChildren(child);
                for (SourceTypeTreeDto c : child) {
                    c.setChildren(new ArrayList<>());
                    this.digui(c.getId(), all, sourceTypeTreeDtoList);
                }
            }
        }
    }
}