(java后台)用户权限的多级菜单遍历方法

很多用户登录后根据用户的标识查询该用户角色所对应的菜单

@Override
public UserRespVo login(UserVo user) {
if(null != user){//如果传入的用户不为空
String userId = user.getUserid();
String password = user.getPassword();
//根据用户id查询用户
UserPo userPo = userPoMapper.selectByPrimaryKey(userId);
if(null != userPo){
//如果存在该用户，对比密码看是否匹配
String resultpassword = userPo.getPassword();
if(resultpassword.equals(password)){
//如果密码匹配，查询用户的菜单
List<MenuPo> resultUserPoMenuList = userPoMapper.selectUserMenu(userPo.getUserid());
List<MenuVo> resultUserVoMenuList = new ArrayList<MenuVo>();
//将查询的结果po转为vo
for (MenuPo menuPo : resultUserPoMenuList) {
MenuVo menuVo = new MenuVo();
BeanUtils.copyProperties(menuPo, menuVo);
resultUserVoMenuList.add(menuVo);
}
//根据一级菜单id查询所有的菜单
List<MenuVo> userMenuVos = new ArrayList<MenuVo>();
for (MenuVo menuVo : resultUserVoMenuList) {
//这里需要的是一级菜单的id，对于没有父菜单id的就是一级菜单
if(StringUtils.isBlank(menuVo.getMenuparent())){
List<MenuVo> iterateMenus = iterateMenus(resultUserVoMenuList, menuVo.getMenuid());
menuVo.setMenuVo(iterateMenus);
userMenuVos.add(menuVo);
}
}
UserRespVo userRespVo = new UserRespVo();
userRespVo.setErrMsg("登录成功");
userRespVo.setStatusCode("1");
userRespVo.setMenus(userMenuVos);
userRespVo.setUserId(userPo.getUserid());
userRespVo.setUserName(userPo.getUsername());
logger.info(userPo.getUserid()+"：登录成功");
return userRespVo;
}else{
//如果密码不匹配
UserRespVo userRespVo = new UserRespVo();
userRespVo.setErrMsg("密码错误");
userRespVo.setStatusCode("0");
logger.info(userPo.getUserid()+"：密码错误，登录失败");
return userRespVo;
}
}else{
UserRespVo userRespVo = new UserRespVo();
userRespVo.setErrMsg("不存在该用户");
userRespVo.setStatusCode("0");
logger.info("不存在该用户，登录失败");
return userRespVo;
}
}
UserRespVo userRespVo = new UserRespVo();
userRespVo.setErrMsg("用户名和密码不能为空");
userRespVo.setStatusCode("0");
logger.info("用户名和密码不能为空");
return userRespVo;
}

//多级菜单查询方法
public List<MenuVo> iterateMenus(List<MenuVo> menuVoList,String pid){
List<MenuVo> result = new ArrayList<MenuVo>();
for (MenuVo menuVo : menuVoList) {
String menuid = menuVo.getMenuid();//获取菜单的id
String parentid = menuVo.getMenuparent();//获取菜单的父id
if(StringUtils.isNotBlank(parentid)){
if(parentid.equals(pid)){
List<MenuVo> iterateMenu = iterateMenus(menuVoList,menuid);
menuVo.setMenuVo(iterateMenu);
result.add(menuVo);
}
}
}
return result;
}