jsp判断手机访问和电脑访问

<%
//取用户操作系统信息
String agent = request.getHeader("User-Agent") == null ? "": request.getHeader("User-Agent");
//out.print(agent);


//agent.contains("Android")判断字符串中是否包含Android
if(agent.contains("Android")||agent.contains("iPhone")||agent.contains("iPad")||agent.contains("iPod")||agent.contains("iOS")){
    //out.print("手机访问");
    response.sendRedirect("/wap2013");
}else{
    //out.print("电脑访问");

}
%>