What is the use of JSTL in JSP?

The JavaServer Pages Standard Tag Library (JSTL) is a collection of useful JSP tags which encapsulates the core functionality common to many JSP applications. JSTL has support for common, structural tasks such as iteration and conditionals, tags for manipulating XML documents, internationalization tags, and SQL tags.

What does JSTL mean?

JavaServer Pages Standard Tag Library
JSTL, which stands for JavaServer Pages Standard Tag Library, is a collection of custom JSP tag libraries that provide common Web development functionality.

What is the difference between JSTL and JSP?

JSP lets you even define your own tags (you must write the code that actually implement the logic of those tags in Java). JSTL is just a standard tag library provided by Sun (well, now Oracle) to carry out common tasks (such as looping, formatting, etc.).

What is JSTL and list features of JSTL?

Features of JSTL: Provides support for conditional processing and Uniform Resource Locator (URL)-related actions to process URL resources in a JSP page. You can also use the JSTL core tag library that provides iterator tags used to easily iterate through a collection of objects.

What is JSTL prefix?

The prefix of core tag is c. The URL for the Formatting tags is http://java.sun.com/jsp/jstl/fmt and prefix is fmt. XML tags. The XML tags provide flow control, transformation, etc. The URL for the XML tags is http://java.sun.com/jsp/jstl/xml and prefix is x.

Should I use JSTL to write JSPS?

That’s the hidden benefit of writing JSPs using only JSTL, because they get all their dynamic data elsewhere. Let the service layer have the business logic and determine what data the JSP needs. This answers your unit testing question, too. You should not have to unit test JSPs; those would be Selenium-like UI tests.

Should you have scriptlet code in JSPS?

You should not have scriptlet code in JSPs. I’d recommend 100\% JSTL and zero scriplet code. JSPs should be purely presentation. That’s the hidden benefit of writing JSPs using only JSTL, because they get all their dynamic data elsewhere.

Is JSTL unit testable?

JSTL by itself is not unit-testable. But the classes and methods you call through it are. It depends on the pattern you’re using. By using the MVC ( spring, struts.) you should avoid the usage of scriptlets in your JSP, because it represent the view it should contain pure XHTML tags.

What is the difference between JSTL and scriplet?

JSTL is a declarative language some kind of XML, while scriplet isn’t. Particularly I have used JSTL in combination with AJAX via prototype for generating RIA without needing to implement another pattern. Recently I have seen this kind of programming with ExtJS and DWR.