思路：用setAttribute()放 ，然后直接输出
Integer str=(Integer)session.getAttribute("count");
int num3= Integer.valueOf(str);
session.setAttribute("count",num3);
你是我的解药还是毒药啊
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'test2.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
Integer str1=(Integer)session.getAttribute("number");
String str2=request.getParameter("guess");
Integer str3=(Integer)session.getAttribute("count");
int num1=Integer.valueOf(str1);
int num2=Integer.parseInt(str2);
int num3=Integer.valueOf(str3);
if(num1==num2){
num3=1;
out.print("您猜对了---再玩一次 <a href='test1.jsp'>guess</a>");
}else if(num1>num2){
num3++;
session.setAttribute("count",num3);
out.print("您猜小了---<a href='test1.jsp'>guess</a>");
out.print("您猜了"+num3+"次");
}else{
num3++;
session.setAttribute("count",num3);
out.print("您猜大了---<a href='test1.jsp'>guess</a>");
out.print("您猜了"+num3+"次");
}
%>
</body>
</html>