I have downloaded Standard-1.1:JSTL 1.1(2.0), I put jstl.jar and standard.jar
into directory of test/WEB-INF/lib,and put c.tld into directory of
test/WEB-INF/tlds,web.xml is follows:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd";>
<web-app>
<description>
examples
</description>
<display-name>JSPtagWAR</display-name>
<listener>
<listener-class>
jsptl.examples.startup.JSPTLExamplesInit
</listener-class>
</listener>
<taglib>
<taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/tlds/c.tld</taglib-location>
</taglib>
</web-app>
I write a jsp file,named forEachColor.jsp:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"; %>
<html>
<body bgcolor="#FFFFFF">
How does one remember colors of the rainbow?</BR>
<br>
<br>
<table width="300" border="1">
<tr>
<td width="67%"><b><i>Name</i></b></td><td><b><i>RGB Value</i></b></td>
</tr>
<c:forEach var="color" items="$colors">
<tr bgcolor="#<c:expr value='$color.RGBValue'/>">
<td><c:expr value="$color.name"/></td>
<td><c:expr value="$color.RGBValue"/></td>
</tr>
</c:forEach>
</table>
</body>
</html>
then I start Tomcat5.0,I visite this page:
http://localhost:8080/test/forEachColor.jsp
But I got errors,why raised errors? How to modify it?
Thanks!
org.apache.jasper.JasperException: /forEachColor.jsp(12,16) No tag "expr"
defined in tag library imported with prefix "c"
at
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:83)
at
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:363)
at
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:233)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1329)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1568)
at org.apache.jasper.compiler.Parser.parseBody(Parser.java:1769)
at org.apache.jasper.compiler.Parser.parseOptionalBody(Parser.java:1083)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1381)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1568)
at org.apache.jasper.compiler.Parser.parse(Parser.java:166)
at
org.apache.jasper.compiler.ParserController.parse(ParserController.java:269)
at
org.apache.jasper.compiler.ParserController.parse(ParserController.java:155)
at
org.apache.jasper.compiler.ParserController.parse(ParserController.java:142)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:245)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:448)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:434)
at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:571)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:293)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:288)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:294)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:490)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1020)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:196)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:490)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1020)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2625)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:490)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1020)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
at
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:490)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1020)
at
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:196)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:612)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:430)
at
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:623)
at java.lang.Thread.run(Thread.java:536)
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