Org.apache.jasper.JasperException

1. Error description

2014-7-13 17:20:50 org.apache.catalina.core.StandardWrapperValve Invoke Critical: Servlet.service () for Servlet [JSP] in Context with path [/FIRSTSSH] threw exception [/pages/student.jsp (Line:3, column:0)/pages/pathtags.jsp (line:1, Colum N:59) Attempt to redefine the prefix C-Http://java.sun.com/jstl/core, when it was already defined as HTTP://JAVA.SUN.C Om/jsp/jstl/core in the current scope. With root causeorg.apache.jasper.JasperException:/pages/student.jsp (Line:3, column:0)/pages/pathtags.jsp (Line:1, C OLUMN:59) Attempt to redefine the prefix C-Http://java.sun.com/jstl/core, when it was already defined as HTTP://JAVA.S Un.com/jsp/jstl/core in the current scope.at org.apache.jasper.compiler.DefaultErrorHandler.jspError ( defaulterrorhandler.java:42) at Org.apache.jasper.compiler.ErrorDispatcher.dispatch (errordispatcher.java:443) at Org.apache.jasper.compiler.ErrorDispatcher.jspError (errordispatcher.java:89) at Org.apache.jasper.compiler.Parser.processIncludeDirective (Parser.java:324) at Org.apache.jasper.compiler.Parser.parseIncludeDirective (parser.java:357) at Org.apache.jasper.compiler.Parser.parseDirective (parser.java:467) at Org.apache.jasper.compiler.Parser.parseElements (parser.java:1427) at Org.apache.jasper.compiler.Parser.parse ( parser.java:138) at Org.apache.jasper.compiler.ParserController.doParse (parsercontroller.java:242) at Org.apache.jasper.compiler.ParserController.parse (parsercontroller.java:102) at Org.apache.jasper.compiler.Compiler.generateJava (compiler.java:198) at Org.apache.jasper.compiler.Compiler.compile (compiler.java:373) at Org.apache.jasper.compiler.Compiler.compile ( compiler.java:353) at Org.apache.jasper.compiler.Compiler.compile (compiler.java:340) at Org.apache.jasper.JspCompilationContext.compile (jspcompilationcontext.java:657) at Org.apache.jasper.servlet.JspServletWrapper.service (jspservletwrapper.java:357) at Org.apache.jasper.servlet.JspServlet.serviceJspFile (jspservlet.java:390) at Org.apache.jasper.servlet.JspServlet.service (JSPSERVLET.Java:334) at Javax.servlet.http.HttpServlet.service (httpservlet.java:727) at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:303) at Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:208) at Org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter ( strutsprepareandexecutefilter.java:96) at Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter ( applicationfilterchain.java:241) at Org.apache.catalina.core.ApplicationFilterChain.doFilter ( applicationfilterchain.java:208) at Org.apache.catalina.core.StandardWrapperValve.invoke ( standardwrappervalve.java:220) at Org.apache.catalina.core.StandardContextValve.invoke (Standardcontextvalve.java : 122) at Org.apache.catalina.authenticator.AuthenticatorBase.invoke (authenticatorbase.java:501) at Org.apache.catalina.core.StandardHostValve.invoke (standardhostvalve.java:170) at Org.apache.catalina.valves.ErrorReportValve.invoke (errorreportvalve.java:98) at orG.apache.catalina.valves.accesslogvalve.invoke (accesslogvalve.java:950) at Org.apache.catalina.core.StandardEngineValve.invoke (standardenginevalve.java:116) at Org.apache.catalina.connector.CoyoteAdapter.service (coyoteadapter.java:408) at Org.apache.coyote.http11.AbstractHttp11Processor.process (abstracthttp11processor.java:1040) at Org.apache.coyote.abstractprotocol$abstractconnectionhandler.process (abstractprotocol.java:607) at Org.apache.tomcat.util.net.aprendpoint$socketprocessor.dorun (aprendpoint.java:2441) at Org.apache.tomcat.util.net.aprendpoint$socketprocessor.run (aprendpoint.java:2430) at Java.util.concurrent.threadpoolexecutor$worker.runtask (threadpoolexecutor.java:886) at Java.util.concurrent.threadpoolexecutor$worker.run (threadpoolexecutor.java:908) at Java.lang.Thread.run ( thread.java:619)

2. Cause of Error

The page is introduced:

pathtags.jsp:

<%@ taglib prefix= "C" uri= "Http://java.sun.com/jstl/core"%> <%@ taglib  prefix= "FMT" uri= "/HTTP/ Java.sun.com/jsp/jstl/fmt "%>  <%@ taglib prefix=" sql "uri=" http://java.sun.com/jstl/sql "%>  <%@ Taglib prefix= "x" uri= "Http://java.sun.com/jsp/jstl/xml"%>  <%@ taglib prefix= "M" uri= "http://java.sun.com /jsp/jstl/functions "%>  <%  String path = Request.getcontextpath ();  String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";  %>    <c:set var= "BP" value= "<%=basePath%>" ></c:set>  

"<%@ taglib prefix=" C "uri=" Http://java.sun.com/jstl/core "%>" appears repeatedly introduced to the page, duplicate

3. Solutions

Remove "<%@ taglib prefix=" C "uri=" Http://java.sun.com/jstl/core "%>" from the page