According to TLD or attribute directive in tag file, attribute value does not accept any expressions

Posted 2020-06-18 yxwkaifa

1、错误描写叙述

2014-7-13 17:27:21 org.apache.jasper.compiler.TldLocationsCache tldScanJar
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2014-7-13 17:27:21 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [jsp] in context with path [/FirstSSH] threw exception [/pages/pathTags.jsp (line: 11, column: 0) According to TLD or attribute directive in tag file, attribute value does not accept any expressions] with root cause
org.apache.jasper.JasperException: /pages/pathTags.jsp (line: 11, column: 0) According to TLD or attribute directive in tag file, attribute value does not accept any expressions
	at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
	at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:443)
	at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:149)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1241)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:876)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1538)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2375)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2427)
	at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2433)
	at org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2375)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2427)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:536)
	at org.apache.jasper.compiler.Node$IncludeDirective.accept(Node.java:638)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2375)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2427)
	at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2433)
	at org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2375)
	at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1825)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:217)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:96)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2441)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2430)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)

2、错误原因

        JSTL core库的有两种taglib伪指令, 当中RT库即是依赖于JSP传统的请求时属性值, 而不是依赖于EL来实现(称为EL库.JSP2.0将支持EL)
JSP中使用<%@ taglib uri=http://java.sun.com/jstl/core prefix="c"%>在2.3版本号都能够,在2.4就不行了

3、解决的方法

     将下面一句：

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

     改成

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

     就能够了