Servlet[jsp]的Servlet.service（）引发了具有根本原因的异常 （这个是什么情况？求解答）
严重: 在路径为/Hospital的上下文中，Servlet[jsp]的Servlet.service（）引发了具有根本原因的异常无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri：[http://java.sun.com/jsp/jstl/core]
org.apache.jasper.JasperException: 无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri：[http://java.sun.com/jsp/jstl/core]
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:54)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:294)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:81)
at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTldResourcePath(TagLibraryInfoImpl.java:251)
at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:122)
at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:435)
at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:493)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1450)
at org.apache.jasper.compiler.Parser.parse(Parser.java:144)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:245)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:106)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:202)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:350)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:597)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:383)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:331)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:765)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
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.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:698)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:367)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:639)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:885)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1693)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
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