Java递归获取部门树 返回jstree数据

@GetMapping("/getDept")
@ResponseBody
public Tree<DeptDO> getDept(String deptId){
    Tree<DeptDO> deptNode = getDeptNode(deptId);
    if (deptNode == null){
        return null;
    }
    List<Tree<DeptDO>> childNode = getChildNode(deptId);
    for (Tree<DeptDO> child:childNode) {
        Tree<DeptDO> node = getDept(child.getId());
        deptNode.getChildren().add(node);
        deptNode.setChildren(true);
    }
    return deptNode;
}
@Autowired
private DeptDao sysDeptMapper;
private Tree<DeptDO> getDeptNode(String deptId){
    Map<String,Object> query = new HashMap<>();
    query.put("deptId",deptId);
    List<DeptDO> deptList =sysDeptMapper.list(query);
    if (deptList.size() == 1){
        DeptDO sysDept = deptList.get(0);
        Tree<DeptDO> tree = getDeptTree(sysDept);
        return tree;
    }else{
        return null;
    }
}
private List<Tree<DeptDO>> getChildNode(String deptId){
    List<Tree<DeptDO>> trees = new ArrayList<>();
    Map<String,Object> query = new HashMap<>();
    query.put("parentId",deptId);
    List<DeptDO> sysDepts = sysDeptMapper.list(query);
    for (DeptDO sysDept : sysDepts) {
        Tree<DeptDO> tree = getDeptTree(sysDept);
        trees.add(tree);
    }
    return trees;
}
private Tree<DeptDO> getDeptTree(DeptDO sysDept){
    Tree<DeptDO> tree = new Tree<>();
    tree.setId(sysDept.getDeptId().toString());
    tree.setParentId(sysDept.getParentId().toString());
    tree.setText(sysDept.getName());
    Map<String, Object> state = new HashMap<>(16);
    state.put("opened", true);
    tree.setState(state);
    if (!("0".equals(tree.getParentId()))){
        tree.setHasParent(true);
    }
    return tree;
}

//树结构
public class Tree<T> {
   private String id;//节点ID
   private String text;//显示节点文本
   private Map<String, Object> state;//节点状态，open closed
   private boolean checked = false;//节点是否被选中 true false
   private Map<String, Object> attributes;//节点属性
   private List<Tree<T>> children = new ArrayList<Tree<T>>();//节点的子节点
   private String parentId;//父ID
   private boolean hasParent = false;//是否有父节点
   private boolean hasChildren = false;//是否有子节点
   //省略getter setter方法
}

//第2种实现

@Override
public List<Tree> getTree() {
    List<Tree> trees = new ArrayList();
    List<DeptDO> list = deptDao.list(new HashMap<>());
    for (DeptDO d : list) {
        if (d.getParentid() == null) {
            Tree tree = new Tree();
            tree.setId(d.getDeptid().toString());
            tree.setText(d.getDeptname());
            Map state = new HashMap();
            state.put("opened", true);
            tree.setState(state);
            List<Tree> childTree = getChild(d.getDeptid());
            if (childTree.size() > 0) {
                tree.setChildren(childTree);
            }
            trees.add(tree);
        }
    }
    return trees;
}

private List<Tree> getChild(Long parentid) {
    List<Tree> trees = new ArrayList();
    Map map = new HashMap();
    map.put("parentid", parentid);
    List<DeptDO> childList = deptDao.list(map);
    for (DeptDO d : childList) {
        Tree tree = new Tree();
        tree.setId(d.getDeptid().toString());
        tree.setText(d.getDeptname());
        List<Tree> childTree = getChild(d.getDeptid());
        if (childTree.size() > 0) {
            tree.setChildren(childTree);
        }
        trees.add(tree);
    }
    return trees;
}

//jstree json

public class Tree {
    private String id;
    private String text;
    private String icon;
    private Map state;
    private List<Tree> children;

   //省略getter setter方法
}