另外加一点,如何我把jsp中的 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> 改成:<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
同样会提示错误:
type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: /JSTLExample/c_out.jsp(3,0) No such tag out in the tag library imported with prefix c
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:219)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:710)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:809)
at org.apache.jasper.compiler.Parser.parse(Parser.java:122)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:199)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:153) ........
同样会提示错误:
type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: /JSTLExample/c_out.jsp(3,0) No such tag out in the tag library imported with prefix c
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:219)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:710)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:809)
at org.apache.jasper.compiler.Parser.parse(Parser.java:122)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:199)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:153) ........
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楼上这样的解释是正确的。还有一点,除了把jstl.jar和standard.jar复制到工作目录myjsp的WEB-INF\lib下,还需要把jakarta_taglibs_standard/tld/c.tld拷贝到工作目录myjsp得WEB-INF下如此配置在Tomcat5.0.28通过
在我的工程文件\WEB-INF\lib中也拷入了jstl.jar和standard.jar
以及我的工程文件\WEB-INF\下拷入c.tld
修改了相关的\WEB-INF\web.xml,如下:<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<error-page>
<error-code>404</error-code>
<location>/error.jsp</location>
</error-page>
</web-app>相关的index.jsp文件,如下:
<%@ page contentType="text/html;charset=gbk" %>
<%@ taglib uri="/WEB-INF/c.tld" prefix="c" %>
<html>
<head>
<title>Count to 10 Example (using JSTL and scriptlet)</title>
</head>
<body>
<%-- 这是利用JSTL 打印1到10 --%>
利用JSTL 打印1到10 <p>
<c:forEach var="i" begin="1" end="10" step="1">
<c:out value="${i}" />
<br/>
</c:forEach>
<%-- 这是利用JSP的scriptlet 打印1到10 --%>
<p> 利用JSP的scriptlet 打印1到10 <p>
<% for(int i=1;i<=10;i++) {%>
<%=i%><br/>
<% } %>
</body>
</html>
HTTP Status 500 -type Exception reportmessagedescription The server encountered an internal error () that prevented it from fulfilling this request.exceptionorg.apache.jasper.JasperException: Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:50)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:411)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:283)
org.apache.jasper.compiler.TagLibraryInfoImpl.createValidator(TagLibraryInfoImpl.java:649)
org.apache.jasper.compiler.TagLibraryInfoImpl.parseTLD(TagLibraryInfoImpl.java:246)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:162)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:418)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
org.apache.jasper.compiler.Parser.parse(Parser.java:126)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)root causejava.lang.ClassNotFoundException: org.apache.taglibs.standard.tlv.JstlCoreTLV
java.net.URLClassLoader$1.run(URLClassLoader.java:199)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:187)
java.lang.ClassLoader.loadClass(ClassLoader.java:289)
java.lang.ClassLoader.loadClass(ClassLoader.java:235)
org.apache.jasper.compiler.TagLibraryInfoImpl.createValidator(TagLibraryInfoImpl.java:645)
org.apache.jasper.compiler.TagLibraryInfoImpl.parseTLD(TagLibraryInfoImpl.java:246)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:162)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:418)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
org.apache.jasper.compiler.Parser.parse(Parser.java:126)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
Apache Tomcat/5.0.28
eclipse会在保存jsp.index的时候提示:Saved failure:null"
如果用<%@ taglib uri="/WEB-INF/c.tld" prefix="c" %>
在Tomcat5.0.28中同样用的上面的,没有问题。为什么??我google了一下:在下面的链接中有相似的情况:
http://ryandaigle.com/pebble/2005/01/27/1106856324774.html
是tomcat5.5.x里面的bug,解决的办法是在 自己应用程序的war文件中删除jsp-api.jar因为这个文件和tomcat5.5.x中/common/lib中的jsp-api.jar有冲突。但是我用的是jboss3.2.6。在D:\jboss-3.2.6\server\default\tmp\deploy没有jsp-api.jar。这个地方没明白为什么会出问题?
在web.xml中添加
<taglib>
<taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/c.tld</taglib-location>
</taglib>将c.tld copy到/WEB-INF/下
什么都不用配制
不用配置web.xml