输出arraylist出错了，帮忙啊

[立志做一个佳娃~]

输出List包含String的情况：
<c:set var="list_string" scope="request"
value="${test_ref.friend_easy}"></c:set>
<c:out value="${list_string}" />

<c:forEach var="list_string_anyone" items="${list_string}">
<c:out value="${list_string_anyone}" />
</c:forEach>

test_ref.friend_easy中的friend_easy是arraylist类型

出错提示为：

type Exception report

message

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

exception

javax.servlet.ServletException: java.lang.AbstractMethodError: javax.servlet.jsp.PageContext.getELContext()Ljavax/el/ELContext;
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.el_jsp._jspService(el_jsp.java:251)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)


root cause

java.lang.AbstractMethodError: javax.servlet.jsp.PageContext.getELContext()Ljavax/el/ELContext;
javax.servlet.jsp.jstl.core.LoopTagSupport.unExposeVariables(LoopTagSupport.java:587)
javax.servlet.jsp.jstl.core.LoopTagSupport.doFinally(LoopTagSupport.java:323)
org.apache.jsp.el_jsp._jspx_meth_c_forEach_0(el_jsp.java:576)
org.apache.jsp.el_jsp._jspService(el_jsp.java:241)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

[立志做一个佳娃~]

感谢1楼，但不是那样的，是JAR冲突造成的

[hyxd2]

list_string_anyone是一个集合，直接输出不了。
<c:out value="${list_string_anyone.属性名}" />

[me精灵鼠]

楼主啊，是什么和什么冲突啊，怎么修改，我也遇到了这个问题