How to resolve : Can not find the tag library descriptor for "http://java.sun.com/jsp/jstl/core" [duplicate]

I know this thread is a year old now but having experienced the same problem I managed to solve the problem by setting a target server for my project.

i.e. right-click on your project and select 'Properties' -> 'Targeted Runtimes' and select the server you going to run your web app on (Tomcat 6 or 7).

I also use this

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

but I don't get any error.

Did you include the jstl.jar in your library? If not maybe this causing the problem. And also the 'tld' folder do you have it? And how about your web.xml did you map it?

Have a look on the info about jstl for other information.

As @ace mentioned you will need the jstl.jar in your project, so if you are using maven, you could add this dependency:

<dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

Source: http://mvnrepository.com/artifact/jstl/jstl/

Hope it helps.

EDIT: Most of servers already have this dependency, if you add it using maven it may cause version conflicts (like Method/ClassNotFoundException) if you don't configure the server well, so it's better set a target server for your project, as @willix mentioned.

Try to add like this:

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

instead of having

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