Struts升级到2.5.5（从2.5.3开始）(Struts Upgrade to 2.5.5 ( from 2.5.3))

 我试图从struts 2版本2.5.3升级到2.5.5 ......我遇到了一个奇怪的问题。 
 
 我们有一个标签如下： 
 
<%@tag description="Rensders an ajax link"   pageEncoding="UTF-8"%>

<%@attribute name="parameters" description="list of parameters that put to this link"
    type="java.util.HashMap" required="false"%> 

       ..............
        <c:forEach items="${parameters}" var="p">
                <c:param name="${p.key}" value="${p.value}"/>
        </c:forEach>
 
 我升级时上面的代码抛出异常！ 
 
Caused by: javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in &lt;forEach&gt;
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.toForEachIterator(ForEachSupport.java:274)
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.supportedTypeForEachIterator(ForEachSupport.java:238)
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.prepare(ForEachSupport.java:155)
    at javax.servlet.jsp.jstl.core.LoopTagSupport.doStartTag(LoopTagSupport.java:256)
    at org.apache.jsp.tag.web.html.link_tag._jspx_meth_c_005fforEach_005f0(link_tag.java:439)
    at org.apache.jsp.tag.web.html.link_tag._jspx_meth_c_005furl_005f0(link_tag.java:405)
    at org.apache.jsp.tag.web.html.link_tag._jspx_meth_sec_005fauthorize_005f0(link_tag.java:366)
    at org.apache.jsp.tag.web.html.link_tag.doTag(link_tag.java:230)
 
 如您所见，标签是JSTL标签而不是struts！ 
 
 我使用Tomcat 8.0。 任何意见。 

I tried to upgrade from struts 2 version 2.5.3 to 2.5.5... I face an strange issue.
 
We have a tag as below:
 
<%@tag description="Rensders an ajax link"   pageEncoding="UTF-8"%>

<%@attribute name="parameters" description="list of parameters that put to this link"
    type="java.util.HashMap" required="false"%> 

       ..............
        <c:forEach items="${parameters}" var="p">
                <c:param name="${p.key}" value="${p.value}"/>
        </c:forEach>
 
The above code throws exception when I upgrade !
 
Caused by: javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in &lt;forEach&gt;
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.toForEachIterator(ForEachSupport.java:274)
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.supportedTypeForEachIterator(ForEachSupport.java:238)
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.prepare(ForEachSupport.java:155)
    at javax.servlet.jsp.jstl.core.LoopTagSupport.doStartTag(LoopTagSupport.java:256)
    at org.apache.jsp.tag.web.html.link_tag._jspx_meth_c_005fforEach_005f0(link_tag.java:439)
    at org.apache.jsp.tag.web.html.link_tag._jspx_meth_c_005furl_005f0(link_tag.java:405)
    at org.apache.jsp.tag.web.html.link_tag._jspx_meth_sec_005fauthorize_005f0(link_tag.java:366)
    at org.apache.jsp.tag.web.html.link_tag.doTag(link_tag.java:230)
 
As you see the tag is a JSTL tag not struts !
 
I use Tomcat 8.0 . Any comments.

原文：