<%
    UserDetailsVO objUserDetailsVO = null;
   ArrayList arlUserDetailsVO = (ArrayList)request.getAttribute("LSTUSERSDETAILS");
   String nonBifFlag = "";
   if(arlUserDetailsVO !=null){
   Iterator it = arlUserDetailsVO.iterator();
   String urlProfile="";
   while(it.hasNext()){
       objUserDetailsVO = (UserDetailsVO)it.next();
        urlProfile = "UserProfile.htm?userID="+objUserDetailsVO.getLogin_Ident()+"&internalID=111"+objUserDetailsVO.getInternalId();

 %>

解决方法:

确保您的类路径中有来自JSTL的jstl.jar和standard.jar(即,Web项目的WEB-INF / lib文件夹).在jsp页面的顶部,您将需要：

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

您的代码的文字翻译如下所示：

<c:set var="objUserDetailsVO" value="${null}"/>
<c:set var="arlUserDetailsVO" value="${requestScope['LSTUSERSDETAILS']}"/>
<c:set var="nonBifFlag" value=""/>
<c:if test="${not empty arlUserDetailsVO}">
    <c:set var="urlProfile" value="${null}"/>
    <c:forEach var="objUserDetailsVO" items="${arlUserDetailsVO}">
        <c:url var="urlProfile" value="UserProfile.htm">
            <c:param name="userID" value="${objUserDetailsVO.login_Ident}"/>
            <c:param name="internalID" value="111${objUserDetailsVO.internalId}"/>
        </c:url>
    </c:forEach>
</c:if>

尽管考虑到您实际上不需要将页面/请求属性设置为null,因为它们已经为空,但是您可以将其简化为：

<c:set var="arlUserDetailsVO" value="${requestScope['LSTUSERSDETAILS']}"/>
<c:if test="${not empty arlUserDetailsVO}">
    <c:forEach var="objUserDetailsVO" items="${arlUserDetailsVO}">
        <c:url var="urlProfile" value="UserProfile.htm">
            <c:param name="userID" value="${objUserDetailsVO.login_Ident}"/>
            <c:param name="internalID" value="111${objUserDetailsVO.internalId}"/>
        </c:url>
    </c:forEach>
</c:if>

请注意,通过使用< c：url>为了构造您的网址,您的网址参数现在将正确编码,因为您的Java代码段中未对它们进行编码.