1.首先查询出组织机构就是一个简单的查询ListdeptList=mapper.getDeptList();MapnodeMap=newHashMap();ListrootIds=newArrayList();for(Deptdept:deptList){LongdeptId=dept.getDeptId();Stringname=dept.getDeptName();LongparentId=dept.getParentId();OrgNodenode=nodeMap.computeIfAbsent(deptId,OrgNode::new);node.setId(deptId);node.s