cannot be resolved in either web.xml or the jar files deployed with this application

1、错误描述

严重: Servlet.service() for servlet [jsp] in context with path [/joint] threw exception [The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application] with root cause
org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
	at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:55)
	at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:277)
	at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:75)
	at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTldResourcePath(TagLibraryInfoImpl.java:243)
	at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:124)
	at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:421)
	at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:479)
	at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1435)
	at org.apache.jasper.compiler.Parser.parse(Parser.java:139)
	at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:227)
	at org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:363)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2508)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2497)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$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)

2、错误原因

      在maven管理的项目中，出现这个错误；查看jsp代码，发现引入了

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

3、解决办法

（1）将jstl.jar有关maven配置放入到pom.xml

（2）jstl.jar存在，需要重新编译项目