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i need some help, i wanted to do a program and used
if(session.getAttribute("logged")!="1"){
String err="You must be logged in!!";
request.setAttribute( "error", err );
String nextJSP = "/login.jsp";
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);
dispatcher.forward(request,response); }
%>
In a jsp, but my boss told me to use jstl So i changed it to:
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<c:if test="${session.getAttribute('logged')!=null}">
<jsp:forward page="login.jsp">
</jsp:forward>
</c:if>
<c:if test="${session.getAttribute('logged')==null}">
<jsp:forward page="princ.jsp"> </jsp:forward>
</c:if>
And i get a nasty error:
"org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application "
I searched the internet for some fixes, i've put the javax.servlet.jsp.jstl-api-1.2.1-javadoc.jar in my library, even put javaee.jar in the Tomcat library, but still got no solution to this, can somebody help me please? PS: i got Eclipse Java EE IDE for Web Developers.(INDIGO) Tomcat 7.08
Your taglib URI is wrong.
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
This URI is from the old and EOL'ed JSTL 1.0 library. Since JSTL 1.1, you need an extra /jsp in the path because the taglib's internal workings were changed because the EL part was moved from JSTL to JSP:
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
Further, the JAR files which you attempted to drop in /WEB-INF/lib are wrong. The javax.servlet.jsp.jstl-api-1.2.1-javadoc.jar is contains only the JSTL javadocs and the javaee.jar contains the entire Java EE API which may be desastreus because Tomcat ships with parts of it already (JSP/Servlet) which may conflict.
Remove them all. You need the jstl-1.2.jar file.
See also:
I think you should include jstl impl jar. Here is one location of the jar i found:
Also, instead of
<c:if test="${session.getAttribute('logged')!=null}">
use one of the following
<c:if test="${sessionScoped.logged != null}">
<c:if test="${sessionScoped[logged] != null}">
<c:if test="${logged != null}">
来源：https://stackoverflow.com/questions/9976281/the-absolute-uri-http-java-sun-com-jstl-core-cannot-be-resolved-in-either-web