Our project will include a Java Bean and we will create a list of objects and set some attributes that will be used in the JSP. Let’s see some of the JSTL core tags usages in a simple web application.
To create a URL with optional query string parameters Subtag of that includes its body if its condition evalutes to ‘false’.įor iteration over tokens separated by a delimiter. Subtag of that includes its body if its condition evalutes to ‘true’.
Simple conditional tag that establishes a context for mutually exclusive conditional operations, marked by and Simple conditional logic, used with EL and we can use it to process the exception from To catch the exception and wrap it into an object. To set the variable value in given scope. To write something in JSP page, we can use EL also with this tag JSTL Core Tags are listed in the below table. Note that all the JSTL standard tags URI starts with and we can use any prefix we want but it’s best practice to use the prefix defined above because everybody uses them, so it will not create any confusion. Syntax to include JSTL functions in JSP page is: JSTL Functions Tags: JSTL tags provide a number of functions that we can use to perform common operation, most of them are for String manipulation such as String Concatenation, Split String etc.Syntax to include JSTL XML tags in JSP page is: JSTL XML Tags: JSTL XML tags are used to work with XML documents such as parsing XML, transforming XML data and XPath expressions evaluation.Using JSTL SQL tags we can run database queries, we include these JSTL tags in JSP with below syntax: JSTL SQL Tags: JSTL SQL Tags provide support for interaction with relational databases such as Oracle, MySql etc.We can include these jstl tags in JSP with below syntax: JSTL Formatting and Localisation Tags: JSTL Formatting tags are provided for formatting of Numbers, Dates and i18n support through locales and resource bundles.In this article, we will look into important JSTL core tags. To use JSTL core tags, we should include it in the JSP page like below. JSTL Core Tags: JSTL Core tags provide support for iteration, conditional logic, catch exception, url, forward or redirect response etc.If you have maven project, below dependencies should be added in pom.xml file or else you will get following error in JSP pages – eclipse Can not find the tag library descriptor for " core"īased on the JSTL functions, they are categorized into five types. If they are not present in the container lib directory, you should include them into your application.
JSTL jars are container specific, for example in Tomcat, we need to include jstl.jar and standard.jar jar files in project build path. You need to include these libraries in your web application project WEB-INF/lib directory. Most of the times, you can find them in the example projects of server download and you can use them. But to use JSTL in our JSP pages, we need to download the JSTL jars for your servlet container.
What else can I do to troubleshoot this? Also, is there any modern documentation on using JSTL? Oracle's docs end up here, which has almost no details on using JSTL, or even how to get it.JSTL is part of the Java EE API and included in most servlet containers. My web-app's web.xml file specifies it is web-app version 3.1 I am not using maven, just copying jars into the WEB-INF/lib folder as needed. If I open the jstl-1.2.jar file with 7zip, I can clearly see the c.tld file inside the META-INF folder and within that file I can even see this line.
I have verified that the jstl-1.2.jar is in my web app's WEB-INF/lib folder and my JSP has the newer, declared at the top. None of the other answers on the internet solve this problem for me. I continue to get JasperException: The absolute uri: cannot be resolved in either web.xml or the jar files deployed with this application. I want to use JSTL 1.2 in my Tomcat 8 web app.