我正在尝试替换Alfresco中的JSP文件中的部分字符串（您可以找到它there）。
更具体地说，我想在第54行的“fullName”之后显示更多信息。我需要的信息作为“GROUP_something”形式的字符串存储在r.id中，我想要“某事”。我可以在没有问题的情况下显示r.id，如下面的代码段所示，但是一旦我尝试使用fn：replace来删除GROUP_前缀，它就会崩溃。
原件：
<h:outputText id="user-txt" value="#{r.fullName}" rendered="#{r.isGroup}" />
也适用：
<h:outputText id="user-txt" value="#{r.fullName} (#{r.id})" rendered="#{r.isGroup}" />
不工作：
<h:outputText id="user-txt" value="#{r.fullName} (#{fn:replace(r.id, 'GROUP_', '')})" rendered="#{r.isGroup}" />
完整代码：http://pastebin.com/w8AXWUH1
完整堆栈跟踪如下：
javax.faces.FacesException: An exception occurred processing JSP page /jsp/dialog/container.jsp at line 194
191:
192:
193:
194: " />
195:
196:
197:
Stacktrace:
caused by:
org.apache.jasper.JasperException: An exception occurred processing JSP page /jsp/dialog/container.jsp at line 194
191:
192:
193:
194: " />
195:
196:
197:
Stacktrace:
caused by:
org.apache.jasper.JasperException: javax.faces.FacesException: Exception while calling encodeEnd on : {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /jsp/dialog/container.jsp][Class: javax.faces.component.html.HtmlForm,Id: dialog][Class: javax.faces.component.UINamingContainer,Id: dialog-body][Class: org.alfresco.web.ui.common.component.UIPanel,Id: users-panel][Class: org.alfresco.web.ui.common.component.data.UIRichList,Id: users-list][Class: org.alfresco.web.ui.common.component.data.UIColumn,Id: _idJsp17][Class: javax.faces.component.html.HtmlOutputText,Id: user-txt]}
caused by:
javax.faces.FacesException: Exception while calling encodeEnd on : {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /jsp/dialog/container.jsp][Class: javax.faces.component.html.HtmlForm,Id: dialog][Class: javax.faces.component.UINamingContainer,Id: dialog-body][Class: org.alfresco.web.ui.common.component.UIPanel,Id: users-panel][Class: org.alfresco.web.ui.common.component.data.UIRichList,Id: users-list][Class: org.alfresco.web.ui.common.component.data.UIColumn,Id: _idJsp17][Class: javax.faces.component.html.HtmlOutputText,Id: user-txt]}
caused by:
javax.faces.FacesException: Could not retrieve value of component with path : {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /jsp/dialog/container.jsp][Class: javax.faces.component.html.HtmlForm,Id: dialog][Class: javax.faces.component.UINamingContainer,Id: dialog-body][Class: org.alfresco.web.ui.common.component.UIPanel,Id: users-panel][Class: org.alfresco.web.ui.common.component.data.UIRichList,Id: users-list][Class: org.alfresco.web.ui.common.component.data.UIColumn,Id: _idJsp17][Class: javax.faces.component.html.HtmlOutputText,Id: user-txt]}
caused by:
javax.faces.el.EvaluationException: Cannot get value for expression '#{r.fullName} (#{fn:replace(r.id, 'GROUP_', '')})'
caused by:
javax.faces.el.ReferenceSyntaxException: Functions not supported in expressions. Function: fn:replace
我无法理解这个错误，因为其他答案（例如this one或this one）提倡这种确切的方法。
我还添加了函数taglib：
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
。
任何帮助表示赞赏！
编辑：有关环境的更多信息：我正在使用Alfresco的“捆绑”版本，使用Tomcat 7.0.30作为容器。使用以下版本的库：