Java 当我混合使用JSTL 1.0和JSTL 1.1 taglib声明时，它会在我的一些服务器（但不是所有服务器）上导致ParseException。为什么？

当我混合使用JSTL 1.0和JSTL 1.1 taglib声明时，它会在我的一些服务器（但不是所有服务器）上导致ParseException

下面是给我带来麻烦的代码块：

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

<c:set var="TEXTVARIABLE">|STRINGOFTEXT|</c:set>
<c:set var="OTHERTEXTVARIABLE">${fn:contains(TEXTVARIABLE, '|STRINGOFTEXT|')}</c:set>

---

这可能是因为类路径中有不同的JSTL版本。换句话说，类路径被污染了。去掉所有JSTL 1.0实现，这样类路径中只有JSTL 1.1。webapp的默认类路径覆盖的路径位于每个

Appserver/lib

，

webapp/WEB-INF/lib

，

JRE/lib

，

JRE/lib/ext

，等等。要确定确切的JSTL版本，请使用一些ZIP或RAR工具提取

JSTL.jar

，然后读取

MANIFEST.MF

文件

javax.servlet.jsp.JspException: com.caucho.jsp.JspLineParseException: /WEB-INF/jsp/online/system/modules/com.MYCOMPANY.marketing/templates/common/MY_JSP_PAGE.jsp:1: tag = 'out' / attribute = 'value': An error occurred while parsing custom action attribute "value" with value "${fn:contains(TEXTVARIABLE, '|STRINGOFTEXT|')}": org.apache.taglibs.standard.lang.jstl.parser.ParseException: EL functions are not supported.
    at org.opencms.jsp.CmsJspTagInclude.includeActionWithCache(CmsJspTagInclude.java:369)
    at org.opencms.jsp.CmsJspTagInclude.includeTagAction(CmsJspTagInclude.java:241)
    at org.opencms.jsp.CmsJspTagInclude.doEndTag(CmsJspTagInclude.java:472)
    at _jsp._WEB_22dINF._jsp._online._system._modules._com__MYCOMPANY__marketing._templates._MAIN_0PAGE__jsp._jspService(_MAIN_0PAGE__jsp.java:153)
    at com.caucho.jsp.JavaPage.service(JavaPage.java:60)
    at com.caucho.jsp.Page.pageservice(Page.java:579)
    at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:179)
    at shared.filter.RemoteAddrFilterBase.doFilter(RemoteAddrFilterBase.java:57)
    at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
    at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
    at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:175)
    at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
    at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:485)
    at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:350)
    at org.opencms.flex.CmsFlexRequestDispatcher.includeExternal(CmsFlexRequestDispatcher.java:194)
    at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:169)
    at org.opencms.loader.CmsJspLoader.service(CmsJspLoader.java:1193)
    at org.opencms.flex.CmsFlexRequestDispatcher.includeInternalWithCache(CmsFlexRequestDispatcher.java:423)
    at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:173)
    at org.opencms.loader.CmsJspLoader.dispatchJsp(CmsJspLoader.java:1227)
    at org.opencms.loader.CmsJspLoader.load(CmsJspLoader.java:1171)
    at org.opencms.loader.A_CmsXmlDocumentLoader.load(A_CmsXmlDocumentLoader.java:232)
    at org.opencms.loader.CmsXmlContentLoader.load(CmsXmlContentLoader.java:52)
    at org.opencms.loader.CmsResourceManager.loadResource(CmsResourceManager.java:964)
    at org.opencms.main.OpenCmsCore.showResource(OpenCmsCore.java:1498)
    at org.opencms.main.OpenCmsServlet.doGet(OpenCmsServlet.java:152)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:115)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:92)
    at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106)
    at com.caucho.filters.CmsGzipFilter.doFilter(CmsGzipFilter.java:177)
    at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
    at shared.filter.RemoteAddrFilterBase.doFilter(RemoteAddrFilterBase.java:57)
    at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
    at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
    at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
    at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:277)
    at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:106)
    at com.caucho.server.dispatch.ForwardFilterChain.doFilter(ForwardFilterChain.java:80)
    at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:207)
    at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:173)
    at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
    at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:274)
    at com.caucho.server.port.TcpConnection.run(TcpConnection.java:514)
    at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:520)
    at com.caucho.util.ThreadPool.run(ThreadPool.java:442)
    at java.lang.Thread.run(Thread.java:595)     
Caused by: com.caucho.jsp.JspLineParseException: /WEB-INF/jsp/online/system/modules/com.MYCOMPANY.marketing/templates/common/MY_JSP_PAGE.jsp:1: tag = 'out' / attribute = 'value': An error occurred while parsing custom action attribute "value" with value "${fn:contains(TEXTVARIABLE, '|STRINGOFTEXT|')}": org.apache.taglibs.standard.lang.jstl.parser.ParseException: EL functions are not supported.
    at com.caucho.jsp.java.JspNode.error(JspNode.java:1489)
    at com.caucho.jsp.java.JspNode.error(JspNode.java:1480)
    at com.caucho.jsp.java.JavaJspGenerator.validate(JavaJspGenerator.java:466)
    at com.caucho.jsp.JspCompilerInstance.generate(JspCompilerInstance.java:475)
    at com.caucho.jsp.JspCompilerInstance.compile(JspCompilerInstance.java:373)
    at com.caucho.jsp.JspManager.compile(JspManager.java:233)
    at com.caucho.jsp.JspManager.createPage(JspManager.java:177)
    at com.caucho.jsp.JspManager.createPage(JspManager.java:157)
    at com.caucho.jsp.PageManager.getPage(PageManager.java:248)
    at com.caucho.jsp.PageManager.getPage(PageManager.java:166)
    at com.caucho.jsp.QServlet.getSubPage(QServlet.java:292)
    at com.caucho.jsp.QServlet.getPage(QServlet.java:210)
    at com.caucho.server.dispatch.PageFilterChain.compilePage(PageFilterChain.java:206)
    at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:133)
    at shared.filter.RemoteAddrFilterBase.doFilter(RemoteAddrFilterBase.java:57)
    at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
    at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
    at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:175)
    at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
    at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:485)
    at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:350)
    at org.opencms.flex.CmsFlexRequestDispatcher.includeExternal(CmsFlexRequestDispatcher.java:194)
    at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:169)
    at org.opencms.loader.CmsJspLoader.service(CmsJspLoader.java:1193)
    at org.opencms.flex.CmsFlexRequestDispatcher.includeInternalWithCache(CmsFlexRequestDispatcher.java:423)
    at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:173)
    at org.opencms.jsp.CmsJspTagInclude.includeActionWithCache(CmsJspTagInclude.java:364)
    ... 45 more