不知道那里出错了，请帮下忙
index.jsp
前面代码
<%@ page contentType= "text/html; charset=gb2312 " language= "java " import= "java.sql.* " errorPage= " " %>
<%@ page import= "com.wgh.DB.connDB " %>
<%
connDB conn=new connDB();
String username=(String)session.getAttribute( "username ");
ResultSet rs_sale=conn.executeQuery( "select top 4 ID,goodsName,price,nowprice,picture from tb_goods where sale=1 order by INTime desc ");
int sale_ID=0;
String s_goodsname= " ";
float s_price=0;
float s_nowprice=0;
String s_picture= " ";
ResultSet rs_new=conn.executeQuery( "select top 6 ID,goodsName,nowprice,introduce,picture from tb_goods where newGoods=1 order by INTime desc ");
int new_ID=0;
String new_goodsname= " ";
float new_nowprice=0;
String new_introduce= " ";
String new_picture= " ";
%>
<html>
<head>
<title> 电子网 </title>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 ">
<link href= "CSS/style.css " rel= "stylesheet ">
</head>
<body>
<table width= "790 " border= "0 " cellspacing= "0 " cellpadding= "0 " align= "center ">
<tr>
<td class= "tableBorder ">
<jsp:include page= "navigation.jsp "/>
<table width= "790 " height= "236 " border= "0 " align= "center " cellpadding= "0 " cellspacing= "0 ">
<tr>
<td width= "182 " height= "182 " valign= "top ">
<jsp:include page= "left.jsp "/>
</td>
.....................................
....................................
错误提示：
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 6
3: <%
4: connDB conn=new connDB();
5: String username=(String)session.getAttribute( "username ");
6: ResultSet rs_sale=conn.executeQuery( "select top 2 ID,goodsName,price,nowprice,picture from tb_goods where sale=1 order by INTime desc ");
7: int sale_ID=0;
8: String s_goodsname= " ";
9: float s_price=0;
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:555)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
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
com.wgh.DB.connDB.executeQuery(connDB.java:58)
org.apache.jsp.index_jsp._jspService(index_jsp.java:60)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:390)
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/6.0.2 logs.
[解决办法]
检索到的数据是null。可能是数据库里没有符合条件的数据。或者你条件写错了
[解决办法]
連接有問題。檢查數據庫聯接
或者SQL語句有錯
[解决办法]
看看connDB.java:58是什么
com.wgh.DB.connDB.executeQuery(connDB.java:58)
我的异常网推荐解决方案：An exception occurred processing JSP page,http://www.myexception.cn/j2se/33144.html
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.myexception.cn/java-web/317.html
