Dinesh on Java

Categories: JSTL

JSTL url Tag <c:url>

JSTL URL tag is used to format and save url in a variable to use it at later stage. The <c:url> tag formats a URL into a string and stores it into a variable. This tag automatically performs URL rewriting when necessary. The var attribute specifies the variable that will contain the formatted URL.

The JSTL url tag is just an alternative method of writing the call to the response.encodeURL() method. The only real advantage the url tag provides is proper URL encoding, including any parameters specified by children param tag.

JSTL <C:URL> Tag Example:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>JSTL URL Tag Example</title>
</head>
<body>
  <c:url value="https://www.dineshonjava.com" var="tutorialLink">
    <c:param name="author" value="Dinesh"></c:param>
  </c:url>
  <c:import url="${tutorialLink}"></c:import>
</body>
</html>

As you can see above, <c:url> tag is being used to store the value of url in a variable tutorialLink.

In <c:import> tag, the url attribute will have following value.

https://www.dineshonjava.com?author=Dinesh
Attributes of <c:url> tag are:

1. value:This attribute provides URL to be processed.

2. var: This attribute provides name of the exported scoped variable for the processed url. The type of the scoped variable is String.

3. context: This attribute provides name of the context when specifying a relative URL resource that belongs to a foreign context.

4. scope: This attribute provides the scope for var.

<<Previous << || Index || >>Next >>

Dinesh Rajput

Dinesh Rajput is the chief editor of a website Dineshonjava, a technical blog dedicated to the Spring and Java technologies. It has a series of articles related to Java technologies. Dinesh has been a Spring enthusiast since 2008 and is a Pivotal Certified Spring Professional, an author of a book Spring 5 Design Pattern, and a blogger. He has more than 10 years of experience with different aspects of Spring and Java design and development. His core expertise lies in the latest version of Spring Framework, Spring Boot, Spring Security, creating REST APIs, Microservice Architecture, Reactive Pattern, Spring AOP, Design Patterns, Struts, Hibernate, Web Services, Spring Batch, Cassandra, MongoDB, and Web Application Design and Architecture. He is currently working as a technology manager at a leading product and web development company. He worked as a developer and tech lead at the Bennett, Coleman & Co. Ltd and was the first developer in his previous company, Paytm. Dinesh is passionate about the latest Java technologies and loves to write technical blogs related to it. He is a very active member of the Java and Spring community on different forums. When it comes to the Spring Framework and Java, Dinesh tops the list!