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Introduction to JSTL using NetBeans E-mail
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2. Why use JSTL?

Advantage of JSTL

  1. Scriptlets (Java codes within JSP) are complex and are extremely hard to be maintained. Unlike scriptlets, JSTL makes our JSP readable and maintainable.
  2. HTML programmer may find it hard to modify the JSP with the scriptlets as he or she may not have the Java programming knowledge. However, if we are using JSTL to replace our scriptlets, HTML programmer can easily understand on whatís going on in the JSP as JSTL is in the form of XML tags similar to the normal HTML tags.
  3. JSTL has been standardized and is reusable tags.
  4. The name of each tag in JSTL is self-explanatory and is easy to understand.
  5. JSTL requires less code compared to scriptlets.


Shortcomings of JSTL

  1. Scriptlets provide you with greater flexibility. As scriptlets is simply a Java codes, you can do anything that you want as you normally do with a Java programming. On the other hand, JSTL is a very specific and each tag has its own purposes.

 

JSTL Tutorial

Until now, you should have known the basic of the JSTL theoretically. Letís move on to real JSTL practice. Start your NetBeans.

Create New Project

Letís first us create new project for this tutorial. After Netbeans has already been started, choose File and New ProjectÖ

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A wizard dialog will show up, choose Web on the left panel and choose Web Application on the right panel. Then click Next to continue.

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In the step 2, we are required to fill in our projectís information details. Use self-explanatory name for the project name. Ok, letís call it JstlDemo. We can keep the rest as default. Then click Finish.

 

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At this point, our web application is ready. File called index.jsp will be automatically created for us.

Preparing the Library

JSTL requires 2 jars; jstl.jar and standard.jar. These two files are not included in our default library. We need to add these libraries to our project.

On the left projects tab panel, we can see a folder named Libraries. Right click on this folder and Add LibraryÖ

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After this one, we will see list of available libraries. Choose JSTL 1.1 and Add Library.

If you carefully look at the index.jsp, it contains the JSTL tag but it is commented.

<%--

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

--%>


You may try to uncomment it to test whether you have correctly imported the JSTL libraries.



 
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