JSP exception handling (2)

JS Although our demo is very successful, and you also know how to define the exception processing page (such as: your exceptionhandler.jsp) in the normal JSP page, but when the JSP throws an exception, the message passed to us seems not very useful oh! To get more useful information, look down:
1: Improved formhandler.jsp as follows:

<%
int age;

try {
Age = Integer.parseint (Request.getparameter (' age '));
catch (NumberFormatException e) {
throw new Jspexception ("Please enter a valid integer value!");
}
%> Note: This time we will capture the NumberFormatException class exception, which passes a message with the new exception (Jspexception, which is a JSP-specific class, is a java.lang.Exeception subclass) (please Enter a valid integer value)
to us;
2: Improve the exceptionhandler.jsp as follows: Replace part of it with
<font color= "Red" >
<%= exception.getmessage ()%><br>
</font> Well, try again: what results??? is not please enter a valid integer value! pull!!