我正在尝试在Tomcat 8中启动一个应用程序，但是当我启动它时，会出现一个HTTP 404 - Not Found页面。我尝试了几件事，但都没有奏效。这是我的web.xml：
<?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>
<display-name>servletExample</display-name>
<description>
A MVC application in java
</description>
<servlet>
<servlet-name>Controlador</servlet-name>
<servlet-class>Controlador</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Controlador</servlet-name>
<url-pattern>/Controlador</url-pattern>
</servlet-mapping>
</web-app>
这是日志：
05-Mar-2018 16:10:32.802 GRAVE [http-nio-8080-exec-41] org.apache.tomcat.util.digester.Digester.endElement End event threw error
java.lang.NoSuchMethodError: javax.servlet.jsp.tagext.TagAttributeInfo.<init>(Ljava/lang/String;ZLjava/lang/String;ZZLjava/lang/String;ZZLjava/lang/String;Ljava/lang/String;)V
at org.apache.tomcat.util.descriptor.tld.TldRuleSet$Attribute.toTagAttributeInfo(TldRuleSet.java:273)
at org.apache.tomcat.util.descriptor.tld.TldRuleSet$TagAttributeRule.end(TldRuleSet.java:151)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1020)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:609)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLNSDTDValidator.endNamespaceScope(XMLNSDTDValidator.java:266)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2005)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:879)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2967)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:841)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:770)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1521)
at org.apache.tomcat.util.descriptor.tld.TldParser.parse(TldParser.java:76)
at org.apache.jasper.servlet.TldScanner.parseTld(TldScanner.java:279)
at org.apache.jasper.servlet.TldScanner$TldScannerCallback.scan(TldScanner.java:313)
at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:378)
at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:191)
at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5204)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1341)
at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:679)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:217)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:613)
at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:348)
at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:52)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
我不知道问题出在哪里，我重新安装了Tomcat，我现在不知道该怎么办。我已经读过问题可能是冲突的jar或jdk的冲突版本，但我不知道如何解决它。我很感激你的帮助。
这是你的问题：
java.lang.NoSuchMethodError: javax.servlet.jsp.tagext.TagAttributeInfo.<init>(Ljava/lang/String;ZLjava/lang/String;ZZLjava/lang/String;ZZLjava/lang/String;Ljava/lang/String;)V
您与JAR版本存在冲突。
查看CLASSPATH中是否有过时的JSTL JAR并进行更新。