java判断是移动端还是pc端

// \b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),
	  // 字符串在编译时会被转码一次,所以是 "\\b"
	  // \B 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)
	  static String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i"
	          +"|windows (phone|ce)|blackberry"
	          +"|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp"
	          +"|laystation portable)|nokia|fennec|htc[-_]"
	          +"|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";
	  static String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser"
	          +"|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";    
 
	  //移动设备正则匹配：手机端、平板
	  static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);
	  static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);    
 
	  /**
	   * 检测是否是移动设备访问
	   *
	   * @Title: check
	   * @Date : 2014-7-7 下午01:29:07
	   * @param userAgent 浏览器标识
	   * @return true:移动设备接入，false:pc端接入
	   */
	  public static boolean checked(String userAgent){
	      if(null == userAgent){
	          userAgent = "";
	      }
	      // 匹配
	      Matcher matcherPhone = phonePat.matcher(userAgent);
	      Matcher matcherTable = tablePat.matcher(userAgent);
	      if(matcherPhone.find() || matcherTable.find()){
	          return true;
	      } else {
	          return false;
	      }
	  }
	  /**
	   * 检查访问方式是否为移动端
	   *
	   * @Title: check
	   * @Date : 2014-7-7 下午03:55:19
	   * @param request
	   * @throws IOException
	   */
	  @SuppressWarnings("static-access")
	public boolean check(HttpServletRequest request,HttpServletResponse response) throws IOException{
	      boolean isFromMobile=false;  
 
	      HttpSession session= request.getSession();
	     //检查是否已经记录访问方式（移动端或pc端）
	      if(null==session.getAttribute("ua")){
	          try{
	              //获取ua，用来判断是否为移动端访问
	              String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase();
	              if(null == userAgent){
	                  userAgent = "";
	              }
	              isFromMobile=this.checked(userAgent);
	              //判断是否为移动端访问
	              if(isFromMobile){
	                  session.setAttribute("ua","mobile");
	              } else {
	                  session.setAttribute("ua","pc");
	              }
	          }catch(Exception e){}
	      }else{
	    	  try{
	              //获取ua，用来判断是否为移动端访问
	              String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase();
	              if(null == userAgent){
	                  userAgent = "";
	              }
	              isFromMobile=this.checked(userAgent);
	              //判断是否为移动端访问
	              if(isFromMobile){
	                  session.setAttribute("ua","mobile");
	              } else {
	                  session.setAttribute("ua","pc");
	              }
	          }catch(Exception e){}
	          isFromMobile=session.getAttribute("ua").equals("mobile");
	      }
	      return isFromMobile;
	  }

if(check(request, response)){
            mv.setViewName("phone/index");
        }else{
            mv.setViewName("page/index");
        }