转载：/magutou007/article/details/5078
首先定义一个工具类，增加一个方法判断请求是否来自手机：
package com.lyf.utils;public class StringUtil {private final static String[] agent = { "Android", "iPhone", "iPod","iPad", "Windows Phone", "MQQBrowser" }; //定义移动端请求的所有可能类型/*** 判断User-Agent 是不是来自于手机* @param ua* @return*/public static boolean checkAgentIsMobile(String ua) {boolean flag = false;if (!ua.contains("Windows NT") || (ua.contains("Windows NT") && ua.contains("compatible; MSIE 9.0;"))) {// 排除 苹果桌面系统if (!ua.contains("Windows NT") && !ua.contains("Macintosh")) {for (String item : agent) {if (ua.contains(item)) {flag = true;break;}}}}return flag;}}
//在SpringMVC框架controller类中增加一个如下方法：
@Controller @RequestMapping("/test")public class RedBagController { public ModelAndView testUa(HttpServletRequest request, HttpServletResponse response) throws IOException {Map<String, Object> map = new HashMap<String, Object>(); String ua = request.getHeader("User-Agent");if(StringUtil.checkAgentIsMobile(ua)){map.put("mm", "来自移动端访问");}else{map.put("mm", "来自PC端访问");}return new ModelAndView("testUa","map",map);}}
//写一个前端页面并命名为 testUa.ftl， 代码如下：
<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport" id="viewport"><meta content="telephone=no" name="format-detection"></head><body>${map.mm}</body></html>
好了，将项目发布到tomcat，然后再地址栏输入：http://localhost:8082/test/test/testUa.html 并切换手机或者电脑模式，就可以看到不同的情况了。
