application.jsp运行不了,急求
java.lang.NullPointerException?
代码如下:运行出现java.lang.
NullPointerException异常
<%@ page contentType= "text/html;charset=gb2312 "%>
<html>
<body>
<%!
void countPeople()
{
ServletContext application=getServletContext();
Integer number=(Integer)application.getAttribute( "Count ");
if(number==null)
{
number=new Integer(1);
application.setAttribute( "Count ",number);
}
else
{
number=new Integer(number.intValue()+1);
application.setAttribute( "Count ",number);
}
}
%>
<%
if(session.isNew())
{
countPeople();
Integer myNumber=(Integer)application.getAttribute( "Count ");
session.setAttribute( "MyCount ",myNumber);
}
%>
<p>
<p>
您是第
<%
int a=((Integer)session.getAttribute( "MyCount ")).intValue();
%>
<%=a%>
个访问本站的客户。
</body>
</html>
------解决方案--------------------java.lang.NullPointerException
空指针异常 看看什么值为空或没有得到
------解决方案--------------------第4行有个!
你的countPeople()方法能运行吗?