jsp问题 求解 求解

把下面代码改成 刷新不会加  求大神帮忙  不甚感谢
<%@ page contentType="text/html; charset=gb2312"%>
<%
int number=0;
if(application.getAttribute("number")==null){
number=1;
}else{
number=Integer.parseInt((String)application.getAttribute("number"));
number=number+1;
}
out.print("你是第"+number+"访问者");
application.setAttribute("number",String.valueOf(number));
 %>