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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

I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
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
How can I make nanorobot?
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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