@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;
}

Java遞歸獲取部門樹 返回ztree數據