高分求救的白痴问题
刚开始接触JSP,却要搞定一台重装的机器,需要将JSP配置好,现在搞不定了。
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<%@ page contentType="text/html;charset=utf-8"%>
<jsp:useBean id="DBbean" scope="page" class="Datebase.DatabaseBean"/>
<jsp:useBean id="SQLbean" scope="page" class="Datebase.RunSql"/>
<%@ page language="java" import="java.net.*" %>
<%@ page language="java" import="java.sql.*" %>
会报这样的错误
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
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
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)
root cause
java.lang.NullPointerException
Datebase.DatabaseBean.executeQuery(DatabaseBean.java:43)
org.apache.jsp.cmb.carcard.bbs_jsp._jspService(org.apache.jsp.cmb.carcard.bbs_jsp:107)
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:332)
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)
我基本上对如何设置JSP是文盲,请高手能详细指点,或者告诉我相关教程的网址,多多拜谢!