opencms 分页问题懂的进来看一下

最近看了别人在网上发的关于opencms分页的例子但是我运行的时候不好使我不明白这句话是什么意思 pageIndex="%(pageContext.pageIndex)"

以下是源码

<%@ taglib prefix="cms" uri="http://www.opencms.org/taglib/cms" %>
<%@ page import="java.util.*"%>
<%@ page import="org.opencms.jsp.*"%>
<%
    String sPageIndex = request.getParameter("pageIndex");
    int iPageIndex=1;
    if(sPageIndex!=null){
       iPageIndex=Integer.parseInt(sPageIndex);
          out.print(sPageIndex);

}

pageContext.setAttribute("pageIndex", iPageIndex+"");
%>

<cms:contentload collector="allInSubTreeDateReleasedDesc" param="/new-signal/zp/news_${number}.html|news|5" pageIndex="%(pageContext.pageIndex)" pageSize="1">
<cms:contentinfo var="contentInfo" scope="request" />
<a href="<cms:link><cms:contentshow element="$(opencms.filename)"/></cms:link>"><cms:contentshow element="Title"/> </a>
</cms:contentload>
<%
CmsContentInfoBean info = (CmsContentInfoBean)request.getAttribute("contentInfo");
int totalNum=info.getResultSize();
%>
共<%=totalNum%>条数据
<a href="fy.jsp?pageIndex=<%=info.getPageNavStartIndex()%>">第一页</a>
<a href="fy.jsp?pageIndex=<%=(info.getPageNavStartIndex()-1)>0?(info.getPageNavStartIndex()-1):1%>">上一页</a>
<a href="fy.jsp?pageIndex=<%=(info.getPageNavStartIndex()+1)>info.getPageCount()?info.getPageCount():(info.getPageNavStartIndex()+1)%>">下一页</a>
<a href="fy.jsp?pageIndex=<%=info.getPageNavEndIndex()%>">最后页</a>

我运行的结果是点下一页的时候没有任何的变化不知道是哪里错了请高手指教谢谢！！！