Recursively process tree data

Good nonsense, go to the code

Entity

public class TreeSelect implements Serializable {
    private static final long serialVersionUID = 1L;

    /**
     * 节点ID
     */
    private Long id;

    /**
     * 节点ID值
     */
    private Long value;

    /**
     * 节点名称
     */
    private String label;

    /**
     * 子节点
     */
    @JsonInclude(JsonInclude.Include.NON_EMPTY)
    private List<TreeSelect> children;
    
}

Controller

    /**
     *  用户树
     */
    @Log(title = "用户树" , businessType = BusinessType.UPDATE)
    @GetMapping("/userTree")
    public AjaxResult userTree() {
        return AjaxResult.success(userService.userTree());
    }

ServiceImpl

    @Override
    public List<TreeSelect> userTree() {
        List<SysUser> userList = userMapper.selectUsertLists();
        //一级菜单
        List<TreeSelect> rootTree = new ArrayList<>();
        TreeSelect treeSelect = new TreeSelect();
        treeSelect.setId(1L);
        treeSelect.setValue(1L);
        treeSelect.setLabel("用户树");
        treeSelect.setChildren(new ArrayList<>());
        rootTree.add(treeSelect);
        List<TreeSelect> roots = bulidTree(rootTree, userList);
        return roots;
    }

public List<TreeSelect> bulidTree(List<TreeSelect> rootTree, List<SysUser> userList) {
        for (TreeSelect deptTreeSelect : rootTree) {
            for (SysUser user : userList) {
                if (user.getDeptId().intValue() == deptTreeSelect.getId().intValue()) {
                    TreeSelect treeSelect = new TreeSelect();
                    treeSelect.setId(user.getUserId());
                    treeSelect.setValue(user.getUserId());
                    treeSelect.setLabel(user.getNickName());
                    if (null != deptTreeSelect.getChildren()) {
                        deptTreeSelect.getChildren().add(treeSelect);
                    }
                }
            }
            if (null != deptTreeSelect.getChildren() && deptTreeSelect.getChildren().size() > 0) {
                bulidTree(deptTreeSelect.getChildren(), userList);
            }
        }
        return rootTree;
    }