/**
	 * 登录提交
	 * 
	 * @param userName
	 * @param password
	 * @param rememberMe
	 * @return
	 */
	@At
	@POST
	@Filters
	public Result login(@Param("userName") String userName, @Param("password") String password, @Param("rememberMe") boolean rememberMe) {
		Result result = shiroUserService.login(userName, password);
		if (result.isSuccess()) {
			User user = (User) result.getData().get("loginUser");
			_putSession(SessionKeys.SESSION_USER_KEY, user);
			if (rememberMe) {
				_addCookie("brt_museum", DES.encrypt(userName + ":" + password, DefaultDESKey.getKey()), 2 * 7 * 24 * 3600);
			}
		}
		return result;
	}

这个可以正常取到参数

/**
	 * 登录提交
	 * 
	 * @param userName
	 * @param password
	 * @param rememberMe
	 * @return
	 */
	@At
	@POST
	@Filters
	public Result login(String userName, String password, boolean rememberMe) {
		Result result = shiroUserService.login(userName, password);
		if (result.isSuccess()) {
			User user = (User) result.getData().get("loginUser");
			_putSession(SessionKeys.SESSION_USER_KEY, user);
			if (rememberMe) {
				_addCookie("brt_museum", DES.encrypt(userName + ":" + password, DefaultDESKey.getKey()), 2 * 7 * 24 * 3600);
			}
		}
		return result;
	}

这样在某些时候就取不到参数了,一路null