1. 获取用户信息并

从用户session 中获取用户信息

    @Operation(summary = "查询当前用户菜单")
    @GetMapping("/getSelfMenu")
    public Result<List<RouterVO>> getSelfMenu() {
        UserInfo userLoginInfo = (UserInfo) StpUtil.getSession().get("userInfo");
        Long id = userLoginInfo.getId();
        return Result.success(menuService.getMenuByUserId(id));
    }

2. 查询用户菜单并递归构建

/**
     * 根据用户id 获取菜单
     * @param id
     * @return
     */
    @Override
    public List<RouterVO> getMenuByUserId(Long id) {
        List<SysMenu> menus = menuMapper.getMenuListByUserId(id);
        //通过递归设置菜单的树形结构
        // 1、获取所有的1级菜单【parentId=0】
        // 2、遍历1级菜单，获取他所有的子元素【其他数据的parentId=当前元素的id】
        List<RouterVO> router = getRourerList(menus);
        return router;
    }

    /**
     * 获取路由
     * @param menus
     * @return
     */
    private List<RouterVO> getRourerList(List<SysMenu> menus) {
        List<RouterVO> routerVOS = new ArrayList<>();
        // 获取所有一级路由
        List<SysMenu> parentMenu = menus.stream().filter(item -> item.getParentId() == 0).collect(Collectors.toList());
        // 转换类型对象
        for (SysMenu menu: parentMenu) {
            RouterVO routerVO = new RouterVO();
            BeanUtil.copyProperties(menu, routerVO);
            routerVOS.add(routerVO);
        }
        // 循环1级路由, 获取子菜单
        for (RouterVO routerVO: routerVOS) {
            // 获取所有子节点
            List<RouterVO> childList = buildTree(menus, routerVO.getId());
            routerVO.setChildren(childList);
        }
        return routerVOS;
    }

    /**
     * 递归匹配所有的子节点
     * @param menus
     * @param parentId
     * @return
     */
    private List<RouterVO> buildTree(List<SysMenu> menus, Long parentId) {
        List<RouterVO> childList = new ArrayList<>();
        for (SysMenu menu: menus) {
            // 判断menu parentId 是否等于传入parentId
            if (menu.getParentId().equals(parentId)) {
                RouterVO routerVO = new RouterVO();
                BeanUtil.copyProperties(menu, routerVO);
                childList.add(routerVO);
            }
        }
        // 递归childList 可能还存在的子节点
        for (RouterVO childItem: childList) {
            childItem.setChildren(buildTree(menus, childItem.getId()));
        }
        return childList;
    }

3. 连表查询用户菜单

public interface SysMenuMapper extends BaseMapper<SysMenu> {
    @Select("select m.* from sys_user_role ur JOIN sys_role r ON ur.role_id = r.id " +
            "JOIN sys_role_menu rm ON r.id = rm.role_id JOIN sys_menu m ON rm.menu_id = m.id WHERE m.deleted = 0 " +
            "AND m.status = 0 AND ur.user_id = #{id} ORDER BY sort ASC;")
    List<SysMenu> getMenuListByUserId(@Param("id") Long id);

}

测试：