java判断是移动端还是pc端

//  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");
        }