Can not find the tag library descriptor for “http://java.sun.com/jsp/jstl/core

Use taglib definition in your JSP or better include it in every page by the first line.

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

There's also fix jstl-1.2 dependency in your project. Also use servlet specification at least 2.4 in your web.xml.

The maven dependencies are (maven is a open source development tool)

<dependency>  <groupId>jstl</groupId>  <artifactId>jstl</artifactId>  <version>1.2</version>  <scope>compile</scope></dependency><dependency>  <groupId>taglibs</groupId>  <artifactId>standard</artifactId>  <version>1.1.2</version>  <scope>compile</scope></dependency>

In the web.xml start writing

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5"     xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

EDIT:

I'd like to add a note that @informatik01 has mentioned in the comment about newer version of JSTL libraries available from Maven repository: JSTL version 1.2.1.

转载：http://stackoverflow.com/questions/15434817/can-not-find-the-tag-library-descriptor-for-http-java-sun-com-jsp-jstl-core