How can my application get to know when a HttpSession is removed?

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Define a Class HttpSessionNotifier which implements HttpSessionBindingListener and implement the functionality what you need in valueUnbound() method.
Create an instance of that class and put that instance in HttpSession.

2013-08-20, 2918👍, 0💬

Can you override jspInit() method? If yes, In which cases?
Can you override jspInit() method? If yes, In which cases? ye, we can. We do it usually when we need to intialize any members which are to be available for a servlet/JSP throughout its lifetime. 2013-08-16, 3211👍, 0💬

A JSP page, include.jsp, has a instance variable "int a", now this page is statically included in another JSP page, index.jsp, w
A JSP page, include.jsp, has a instance variable "int a", now this page is statically included in another JSP page, index.jsp, which has a instance variable "int a" declared. What happens when the index.jsp page is requested by the client? Compilation error, as two variables with same name can't be ... 2013-08-16, 3106👍, 0💬

What is the difference between directive include and jsp include?
What is the difference between directive include and jsp include? <%@ include> : Used to include static resources during translation time. : Used to include dynamic content or static content during runtime. 2013-08-19, 3013👍, 0💬

How can my application get to know when a HttpSession is removed?
How can my application get to know when a HttpSession is removed? Define a Class HttpSessionNotifier which implements HttpSessionBindingListener and implement the functionality what you need in valueUnbound() method. Create an instance of that class and put that instance in HttpSession. 2013-08-20, 2919👍, 0💬

How do I do fill_in_the_blank for each file in a directory?
How do I do fill_in_the_blank for each file in a directory? Here's code that just prints a listing of every file in the current directory: #!/usr/bin/perl -w opendir(DIR, "."); @files = readdir(DIR); closedir(DIR); foreach $file (@files) { print "$file\n"; } 2013-08-23, 2902👍, 0💬

How does JSP handle runtime exceptions?
How does JSP handle runtime exceptions? Using errorPage attribute of page directive and also we need to specify isErrorPage=true if the current page is intended to URL redirecting of a JSP. 2013-08-20, 2883👍, 0💬

Which of these is a difference between C++ and Perl?
Which of these is a difference between C++ and Perl? Perl can have objects whose data cannot be accessed outside its class, but C++ cannot. Perl can use closures with unreachable private data as objects, and C++ doesn't support closures. Furthermore, C++ does support pointer arithmetic via `int *ip ... 2013-08-22, 2321👍, 0💬

Why do you use Perl?
Why do you use Perl? Perl is a powerful free interpreter. Perl is portable, flexible and easy to learn. 2013-08-21, 2299👍, 0💬

How do I set environment variables in Perl programs?
How do I set environment variables in Perl programs? you can just do something like this: $ENV{'PATH'} = '...'; As you may remember, "%ENV" is a special hash in Perl that contains the value of all your environment variables. Because %ENV is a hash, you can set environment variables just as you'd set... 2013-08-21, 2277👍, 0💬

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