@Override
	public String execute() throws Exception {
		User_Dao UD = new User_DaoImpl();
		boolean re = UD.checkName(userId) && UD.checkUsername(userName);
		status = re ? "" : "用户名或团队名已经存在!";
		if(re){
			boolean result = userService.addUser(this);
			status = result ? "" : "error";
			if(result) return "success";
		}
		return "error";
	}