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Listing 13 - Concatenate current date and time to the parameter string.
long theDate = new Date().getTime(); parameters = parameters + "item=" + theDate;response.setContentType("text/html");%%>

Listing 13 also sets the output content type to "text/html" .

Finally, Listing 13 signals the end of the scriptlet that began in Listing 11 .

Create the hyperlink

Listing 14 uses a JSP expression tag along with raw HTML code to create the hyperlink shown near the top of the page in Figure 2 .

Listing 14 - Create the hyperlink.

Missing Figure

Listing 14 also uses raw HTML code to create the line of text that appears immediately above the list of dates in Figure 2 .

Display the list of dates

Listing 15 shows another scriptlet containing pure Java code. The first six lines of code display the historical date and time information. The next line of codedisplays the current date and time.

Listing 15 - Display the list of dates.
<% if(items != null){for(int i = 0; i<items.length; i++){ long millis = Long.parseLong(items[i]); out.println("" + new Date(millis) + "<br/>"); }//end for loop}//end if out.println("" + new Date(theDate) + "<br/>"); out.println("</body></html>"); %%>

The last line of code creates the HTML elements necessary to finish the page.

A choice

I could have broken this scriptlet into two or more scriptlets using raw HTML code in between to display the material. However, I decided that it was simplerin this case to use Java println statements to display the material than it would have been to break it up and use interspersed HTML code.

Run the programs

I encourage you to copy the code from Listing 16 and Listing 17 . Install the programs on your server and run them. Experiment with the code,making changes, and observing the results of your changes. Make certain that you can explain why your changes behave as they do.


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java4560: Session Tracking using URL Rewriting
  • File: Java4560.htm
  • Published: 12/23/13
  • Revised: 01/31/16

Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

Complete program listings

I recognize that the code in Listing 16 may be difficult to read. Note, however that if you have difficulty reading it, you can reconstruct the entire programfrom the code fragments provided earlier. You might also try zooming with your browser to see if that makes it easier to read.

Listing 16 - The servlet named Java4560a.java.

Missing Figure

Listing 17 - The JSP program named Java4560b.jsp.

Missing Figure


Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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