Spring 过滤器打印请求参数

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {



		StringBuffer buf = new StringBuffer();
		buf.append("URL=:" + request.getRequestURL() + "\r\n");

		Enumeration<String> names = request.getParameterNames();
		int c = 0;
		while (names.hasMoreElements()) {
			c++;
			String key = names.nextElement();
			String value = request.getParameter(key);
			buf.append(String.format("%s --> %s \r\n", key, value));
		}
		buf.append("Parameter Length " + c + "\r\n");
		String userAgent = request.getHeader("User-Agent");
		buf.append("is from phone ? " + (userAgent.contains("Android") ? "Android" : "") + (userAgent.contains("iPhone") ? "iOS" : ""));
		System.out.println(buf);
	
		return true;
	}