Java 後臺判斷是否爲ajax請求

/**
	 * 是不是Ajax請求
	 * @param request
	 * @return
	 */
	public static boolean isAjax(ServletRequest request){
		return  "XMLHttpRequest".equalsIgnoreCase(((HttpServletRequest) request).getHeader("X-Requested-With"));
	}

ajax 請求會在請求頭部添加 X-Requested-With: XMLHttpRequest