运行java web应用程序时出现Apache错误

Question

我从我的朋友那里收到了一个Java Web程序，我试图运行并理解代码，但我似乎无法运行它，以下是Apache日志中的错误消息

03-JUL-2014 20:33:51.873严重的[http-nio-8084-exec-29]org.apache.catalina.core.standardWrapperValve.invoke servlet.Service（）在路径[/]上下文中的servlet[jsp]引发异常[绝对URI：http://java.sun.com/jsp/jstl/core无法在web.xml或与此应用程序一起部署的jar文件中解析]根原因org.apache.jasper.jasperException：绝对URI：http://java.sun.com/jstl/core无法在web.xml或与此应用程序一起部署的jar文件中解析jsperror（defaulterrorhandler.java:56)在org.apache.jasper.compiler.errordispatcher.dispatch（errordispatcher.java:278)在org.apache.jasper.compiler.errordispatcher.javatch（errordispatcher.java:76)在org.apache.jasper.compiler.errordispatcher.java:76)在org.apache.jasper.compiler.errordispatcher.java(parser.java:411)在org.apache.jasper.compiler.parser.parseDirective（parser.java:469)在org.apache.jasper.compiler.parseElements（parser.java:1455)在org.apache.jasper.compiler.parser.parser.parse（parser.java:139)在org.apache.jasper.compiler.parser.parse（parser.java:229)在compiler.compiler.compiler.java:375)在org.apache.jasper.compiler.compiler.compiler(compiler.java:355)在org.apache.jasper.compiler.compiler.compiler.compiler(compiler.java:355)在org.apache.jasper.compiler.compiler.compiler.compiler.compiler.compiler(compiler.java:342)在spservlet.java:347)在javax.servlet.http.httpservlet.service（httpservlet.java:725)在org.apache.catalina.core.applicationFilterChain.InternaldoFilter（applicationFilterChain.java:301)在org.apache.catalina.core.applicationFilterChain.doFilter（applicationFilterChain.java:206)，org.apache.catalina.core.applicationFilterChain.java:206)，org.apache.tomcat.websocket.wsfilter.doFilter（.netbeans.modules.web.monitor.server.monitorFilter.doFilter（monitorFilter.java:393)，地址为org.apache.catalina.core.applicationFilterChain.internaldoFilter（applicationFilterChain.java:239)，地址为org.apache.catalina.core.applicationFilterChain.doFilter（applicationFilterChain.java:206)，地址为org.apache.catalina.core.standardWrapperValve.invoke（INVoke（AuthenticatorBase.java:503)，org.apache.catalina.core.standardHostValve.invoke（standardHostValve.java:136)，org.apache.catalina.valves.errorReportValve.invoke（errorReportValve.invoke（errorReportValve.java:74)，org.apache.catalina.valves.abstractAccessLogValve.invoke（AbstractAccessLogValve.invoke（te.http11.abstractHttp11Processor.process(abstractHttp11Processor.java:1015)在org.apache.coyote.abstractProtocol$abstractConnectionHandler.process(abstractProtocol.java:652)在org.apache.coyote.http11.http11nioProtocol$http11ConnectionHandler.process(http11nioProtocol.java:222)在.ThreadPoolExecutor.RunWorker（ThreadPoolExecutor.java:1142）在java.util.concurrent.ThreadPoolExecutor$worker.run（threadPoolExecutor.java:617)在java.lang.thread.run（thread.java:745)处

有什么方法可以从这些日志中知道错误是什么吗？如果没有，我需要提供什么信息才能知道错误？

我的web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<welcome-file-list>
<welcome-file>main_beforelogin.jsp</welcome-file>
</welcome-file-list>

<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>itemServlet</servlet-name>
<servlet-class>com.etc.servlet.itemServlet</servlet-class>
</servlet>
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>indexServlet</servlet-name>
<servlet-class>com.etc.servlet.indexServlet</servlet-class>
</servlet>
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>noticeServlet</servlet-name>
<servlet-class>com.etc.servlet.noticeServlet</servlet-class>
</servlet>
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>usrServlet</servlet-name>
<servlet-class>com.etc.servlet.usrServlet</servlet-class>
</servlet>
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>adminLoginServlet</servlet-name>
<servlet-class>com.etc.servlet.adminLoginServlet</servlet-class>
</servlet>


<servlet-mapping>
<servlet-name>itemServlet</servlet-name>
<url-pattern>/servlet/itemServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>indexServlet</servlet-name>
<url-pattern>/servlet/indexServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>noticeServlet</servlet-name>
<url-pattern>/servlet/noticeServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>usrServlet</servlet-name>
<url-pattern>/servlet/usrServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>adminLoginServlet</servlet-name>
<url-pattern>/adminLoginServlet</url-pattern>
</servlet-mapping>



</web-app>

Answer 1

验证是否将jstl-xxx.jar的（正确版本）放在应用程序的WEB-INF/lib目录中。