在Apache tomcat7中安装标记库时遇到麻烦

我有应用程序，我想使用jstl tag lib 。

我有两个jar子JSTL.jar和standard.jar 。 我把它们放在我的WEB-INF/lib文件夹中。

我在web.xml配置它就像

    http://java.sun.com/jstl/fmt /WEB-INF/fmt.tld   http://java.sun.com/jstl/core /WEB-INF/c.tld   http://java.sun.com/jstl/sql /WEB-INF/sql.tld   http://java.sun.com/jstl/x /WEB-INF/x.tld   loadingServlet loadingServlet   loadingServlet /loadingServlet   homepage.jsp   

在页面上我正在使用以下代码

我仍然得到错误。 喜欢

  INFO: Deploying web application directory ServletExample 13 Apr, 2012 4:00:31 PM org.apache.tomcat.util.digester.Digester startElement SEVERE: Begin event threw exception java.lang.IllegalArgumentException: taglib definition not consistent with specification version at org.apache.catalina.startup.TaglibLocationRule.begin(WebRuleSet.java:1167) at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1282) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1359) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2747) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522) at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1543) at org.apache.catalina.startup.ContextConfig.parseWebXml(ContextConfig.java:1714) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1208) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:881) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:316) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5103) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:812) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:787) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:607) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1055) at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:978) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:472) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1322) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89) at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:379) at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:324) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1041) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:774) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1033) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:291) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:727) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.startup.Catalina.start(Catalina.java:620) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:303) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:431) 13 Apr, 2012 4:00:31 PM org.apache.catalina.startup.ContextConfig parseWebXml SEVERE: Parse error in application web.xml file at jndi:/localhost/ServletExample/WEB-INF/web.xml java.lang.IllegalArgumentException: taglib definition not consistent with specification version at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2687) at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2713) at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1285) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1359) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2747) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522) at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1543) at org.apache.catalina.startup.ContextConfig.parseWebXml(ContextConfig.java:1714) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1208) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:881) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:316) 

Answer 1

你犯了几个错误：

• 您不应该在web.xml手动重新定义JAR自己的taglib。 这是一个神话。
• 您应该为Tomcat 7使用与Servlet 3.0兼容的web.xml 。
• 您应该使用JSTL 1.2，而不是1.0。

全部删除它们。 从web.xml删除所有 。 从/WEB-INF/lib删除这两个JAR。 然后按照以下步骤操作：

1. 下载jstl-1.2.jar并将其放在/WEB-INF/lib 。

2. 修复您的web.xml与Servlet 3.0兼容。

3. 使用记录的 taglib声明：

    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 

也可以看看：

• 我们的JSTL维基页面

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我怀疑你使用Roseindia.net作为Java EE资源。 那里也提到了你的无效方法。 你不应该这样做。 您应该将该站点放在Internet黑名单中。 这个网站充满了糟糕的答案和不良做法。 当然，使用Oracle的官方资源，或Stackoverflow.com。

Answer 2

您不再需要在web.xml中配置taglib。 另外你要定义不同的taglib url（iirc web.xml是正确的）。

使用jsp中web.xml中的uris并删除web.xml taglib defs。