jsp页面获取数据库数据弹出500

Question

HTTP Status 500 – Internal Server ErrorType Exception ReportMessage An exception occurred processing [/news.jsp] at line [81]Description The server encountered an unexpected condition that prevented it from fulfilling the request.Exception org.apache.jasper.JasperException: An exception occurred processing [/news.jsp] at line [81] 78:           79:          <% 80:                ArrayList<Edit>editlist=(ArrayList<Edit>)session.getAttribute("editlist"); 81:                 for( Edit edit:editlist) 82:                 { 83:                     %> 84:          Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:613) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:510) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)jsp页面代码如下： <form action="Editservlet" method="get" name="postform">    <table width="871" height="233" border="0" cellspacing="0">                  <%               ArrayList<Edit>editlist=(ArrayList<Edit>)session.getAttribute("editlist");                for( Edit edit:editlist)                {                    %>              <tr>        <th width="106" height="28" scope="col">新闻编号：</th>        <th width="28" scope="col"><%=edit.getId() %></th>        <th width="30" scope="col">&nbsp;</th>        <th width="95" scope="col">新闻标题：</th>        <th width="317" scope="col"><%=edit.getTital() %></th>        <th width="30" scope="col">&nbsp;</th>        <th width="74" scope="col">作者：</th>        <th width="175" scope="col"><%=edit.getWriteer() %></th>      </tr>      <tr>        <td height="126"> 新闻内容：</td>        <td colspan="7"><%=edit.getContent() %></td>      </tr>      <tr>        <td>发布时间：</td>        <td><%=edit.getRelea() %></td>        <td>&nbsp;</td>        <td colspan="3">&nbsp;</td>        <td>&nbsp;</td>        <td>&nbsp;</td>             </tr>     <%                         }                     %>    </table>servlet页面：dopost里没有写东西，可以帮忙看一下是哪里错吗?实在找不出来了