CODEWITHSUNDEEP
javaservletswebjstltomcat8
Sandeep Chatterjee
Sandeep Chatterjee

Reputation: 3249

org.apache.jasper.JasperException: The attribute prefix [fn] does not correspond to any imported tag library

I am trying to deploy and run the Hello World application using IntelliJIDEA 14.1.4 on Tomcat 8.0.14(Tomcat Server -> Local). The project was created using maven-archetype-webapp and later imported to the IDE by specifying path to pom.xml.

Everything works fine as documented in the servlets tag info, but when I remove the following line:

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

and add it in my include.jsp, I encounter an:

org.apache.jasper.JasperException: /WEB-INF/jsp/hello.jsp (line: 18, column: 42) The attribute prefix [fn] does not correspond to any imported tag library

Project structure:

enter image description here

include.jsp

<%-- 'header' file that will be included in every JSP page ensuring the same definitions are included in all our JSPs. --%>
<%@ page session="false"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

index.jsp:

<%@ include file="/WEB-INF/jsp/include.jsp" %>
<c:redirect url="/WEB-INF/jsp/hello.jsp"/>

hello.jsp:

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Application Home</title>
  <style>.error {
    color: red;
  }
  .success {
    color: green;
  }</style>
</head>
<body>
<form action="hello" method="post">
  <h1>Hello</h1>

  <p>
    <label for="name">What's your name?</label>
    <input id="name" name="name" value="${fn:escapeXml(param.name)}">
    <span class="error">${messages.name}</span>
  </p>

  <p>
    <label for="age">What's your age?</label>
    <input id="age" name="age" value="${fn:escapeXml(param.age)}">
    <span class="error">${messages.age}</span>
  </p>

  <p>
    <input type="submit">
    <span class="success">${messages.success}</span>
  </p>
</form>
</body>
</html>

Question:

Is it a bad idea to add the line only once(include.jsp) so that I can use it where required rather than adding it in every JSP or is the error cause because of something else which I am missing?

Upvotes: 1

Views: 2314

Answers (1)

Sandeep Chatterjee
Sandeep Chatterjee

Reputation: 3249

Silly, as it may seem, I missed the include statement in hello.jsp which was causing the exception. Posting the answer because I want to keep this information here for future reference.

Missing statement inside hello.jsp

<%@ include file="/WEB-INF/jsp/include.jsp" %>

hello.jsp:

<%@ include file="/WEB-INF/jsp/include.jsp" %>
<!DOCTYPE html>
....
</body>
</html>

Upvotes: 2

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