title: Tomcat 7 and JSTL
body: <p>I wrote a web application with Eclipse Tomcat and it works on my local Tomcat 7, when I tried to publish it online on a Tomcat 7, I had the following error:</p>
  
  <blockquote>
    <p>SEVERE: Servlet.service() for servlet [obliquid.servlet.Index] in context with path [/cp] threw exception [The absolute uri: <code>http://java.sun.com/jsp/jstl/core</code> cannot be resolved in either web.xml or the jar files deployed with this application] </p>
  </blockquote>
  
  <p>Tomcat 7 has "Spec versions: Servlet 3.0, JSP 2.2, EL 2.2", so JSTL is not included?</p>
  
  <p>When I tried to upload standard.jar and jstl.jar I had the following error:</p>
  
  <blockquote>
    <p>org.apache.jasper.JasperException: /jsp/index.jsp (line: 3, column: 62) Unable to read TLD "META-INF/c.tld" from JAR file "jndi:/localhost/cp/WEB-INF/lib/standard.jar": org.apache.jasper.JasperException: Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV</p>
  </blockquote>
  
  <p>I did some googling, but I couldn't sort it out, some said it could be caused by conflicting versions of the jars. Maybe I should not include those jars and use a different JSTL url? Mine is for JSTL 1.1 I think, is there a new URL for JSTL 1.2?</p>
  
  <p>What should I do to solve the problem and make this application run?</p>