<%@ page language="java" import="java.util.*,bbs.dao.impl.*,bbs.dao.*,bbs.entity.*" pageEncoding="gbk"%>
<%
BoardDao borad = new BoardDaoImpl();
Map map = borad.findBoard();
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>index1.jsp</title>
</head>
<body>
<div>
<img alt="" src="images/logo.gif">
<div style="color:red;background-color:ccffcc;font-size:14; width:800px;">您尚未 登陆| 注册</div>
</div>
<div>
<table border="1px" bordercolor="#CCFFFF" width="787" height="299">
<tr>
<td colspan="2" align="center">
论坛
</td>
<td width="180">
主题 </td>
<td width="255">
最后发表 </td>
</tr>
<%
List li = (List)map.get(new Integer(0));
for(int i=0;i<li.size();i++)
{
Board bo = ((Board)li.get(i));
%>
<tr>
<td colspan="4"><%=bo.getBoardTitle() %></td>
</tr>
<tr>
<td width="13"> </td>
<td width="299"><img src="images/board.gif"> 暂无 </td>
<td>30
</td>
<td><p>暂无<br>
暂无[1990-01-01]<br>
</p>
</td>
</tr>
<%}%>
</table>
</div>
</body>
</html>
帮帮我 谢谢啦!!
<%
BoardDao borad = new BoardDaoImpl();
Map map = borad.findBoard();
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>index1.jsp</title>
</head>
<body>
<div>
<img alt="" src="images/logo.gif">
<div style="color:red;background-color:ccffcc;font-size:14; width:800px;">您尚未 登陆| 注册</div>
</div>
<div>
<table border="1px" bordercolor="#CCFFFF" width="787" height="299">
<tr>
<td colspan="2" align="center">
论坛
</td>
<td width="180">
主题 </td>
<td width="255">
最后发表 </td>
</tr>
<%
List li = (List)map.get(new Integer(0));
for(int i=0;i<li.size();i++)
{
Board bo = ((Board)li.get(i));
%>
<tr>
<td colspan="4"><%=bo.getBoardTitle() %></td>
</tr>
<tr>
<td width="13"> </td>
<td width="299"><img src="images/board.gif"> 暂无 </td>
<td>30
</td>
<td><p>暂无<br>
暂无[1990-01-01]<br>
</p>
</td>
</tr>
<%}%>
</table>
</div>
</body>
</html>
帮帮我 谢谢啦!!
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31: <%
32: List li = (List)map.get(new Integer(0));
33: for(int i=0;i<li.size();i++)
34: {
35: Board bo = ((Board)li.get(i));
36: %>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:524)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause java.lang.NullPointerException
org.apache.jsp.index1_jsp._jspService(index1_jsp.java:91)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.错误
li应该是空的。
if(li!=null){
//然后在循环
}