How can I use the same object in the different jsp files?

Question

I am doing a project. I have finished my jave source files and compiled them successfully. And I also wrote a main method to test my classes, they also worked well. Now I am trying to use my jave code in the jsp files. But I meet a problem, in my method of java source file, I can generate a object of a class, and use it in the whole main method. But in the different jsp files, how can I do same thing?
For example, in the .java file,
Vector vl = new Vector();
While ...{
vl.add(...)
In each of my .jsp file I want to do one loop of the above, meanwhile I want to do that in the same object.
I hope you can understand what I mean. Really need your help!

Answer 1

put your object into a session and you can the use it in all the jsps as long as the session is valid. Or you could create a static variable in the class that only creates one instance off an object and then create a static method to return this object.