weixin_42362018 2010-04-06 18:35
浏览 176
已采纳

谁能帮我看一下啦，急啊！

HTTP Status 500 -

type Exception report

message

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

exception

org.apache.jasper.JasperException: java.lang.String cannot be cast to java.util.List
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:395)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
cn.com.jobedu.blog.GetBlogServlet.doGet(GetBlogServlet.java:48)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List
org.apache.jsp.displayBlog_jsp._jspService(displayBlog_jsp.java:58)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
cn.com.jobedu.blog.GetBlogServlet.doGet(GetBlogServlet.java:48)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
Apache Tomcat/5.5.20
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ page import="cn.com.jobedu.blog.Blog"%>
<%@ page import="cn.com.jobedu.blog.Comment"%>
<%@ page import="java.util.List"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">



显示博文


<% Blog blog=(Blog)request.getAttribute("blog");
List list=(List)request.getAttribute("commentList");
%>
 
的评论
评论时间

 
评论人:
内容:
 


  • 写回答

4条回答 默认 最新

  • 拽拽的初行者 2010-04-06 18:44
    关注

    [quote] List list=(List)request.getAttribute("commentList"); [/quote]

    你的commentList是个 String 不是List。

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(3条)

报告相同问题？

悬赏问题

  • ¥15 BP神经网络控制倒立摆
  • ¥20 要这个数学建模编程的代码 并且能完整允许出来结果 完整的过程和数据的结果
  • ¥15 html5+css和javascript有人可以帮吗？图片要怎么插入代码里面啊
  • ¥30 Unity接入微信SDK 无法开启摄像头
  • ¥20 有偿 写代码 要用特定的软件anaconda 里的jvpyter 用python3写
  • ¥20 cad图纸，chx-3六轴码垛机器人
  • ¥15 移动摄像头专网需要解vlan
  • ¥20 access多表提取相同字段数据并合并
  • ¥20 基于MSP430f5529的MPU6050驱动，求出欧拉角
  • ¥20 Java-Oj-桌布的计算