<logic:iterate id="agUser" name="agUserOverview">
        <tr>
        <td align="left" class="page"

        <a href="PRocessuser.do?actiontype=view&aguserid=<bean:write name="agUser" property="userid" filter="true" />">
            <bean:write name="agUser" property="userid" filter="true" /></a>
          </td>
             <td align="center" class="page"><bean:write name="agUser" property="username" filter="true" /></td>
             <td align="center" class="page"><bean:write name="agUser" property="passWord" filter="true" /></td>
             <td align="center" class="page">
             <logic:equal name="agUser" property="roleid" value="1">
             治理員
             </logic:equal>
             <logic:equal name="agUser" property="roleid" value="2">
             普通員工
             </logic:equal>
             </td>
          </tr>
</logic:iterate>

假如把紅色那段去掉，程序就能運行，也能把數據表現出來， 但是假如留下這段，頁面就會出錯誤：

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Cannot find message resources under key org.apache.struts.action.MESSAGE	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:867)	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:800)	org.apache.jsp.system.user.queryuserresult_jsp._jspService(queryuserresult_jsp.java:175)	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)	javax.servlet.http.HttpServlet.service(HttpServlet.java:856)	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)	javax.servlet.http.HttpServlet.service(HttpServlet.java:856)	org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1056)	org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:388)	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:231)	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)	javax.servlet.http.HttpServlet.service(HttpServlet.java:743)	javax.servlet.http.HttpServlet.service(HttpServlet.java:856)