新手求助,急急急急急急急急急
我的程序:
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%!
int PageSize=20;
int ShowPage=1;
int RowCount=0;
int PageCount=0;
Connection con=null;
Statement stmt=null;
ResultSet rs=null;%>
<%
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
con = DriverManager.getConnection("jdbc:microsoft:sqlserver://192.168.1.33:1433;DatebaseName=DB_YHMSG","sms1","sms1sfwss");
stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery("select * from TYHXX");
rs.last();
RowCount = rs.getRow();
PageCount = ((RowCount% PageSize)==0?(RowCount/PageSize):(RowCount/PageSize)+1);
}
catch(Exception ex){
System.out.println(ex.toString());}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<body>
<font size=5 color="blue">
<center>数据库管理--记录集分页显示</center>
</font>
<HR>
<P></P>
<center>
<%=rs.getString(2)%>
<h3>目前在第<font size=4 color="red"><%=ShowPage%></font>页,共有
<%try{rs.close();
stmt.close();
con.close();
}
catch(Exception ex){
System.out.println(ex.toString());
}%>
</html>
报的错误:
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.service(JspServletWrapper.java:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
root cause
java.lang.NullPointerException
org.apache.jsp.bb_jsp._jspService(bb_jsp.java:86)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
我的环境变量是这样设的:
.;c:\j2sdk1.4.2\lib\mssqlserver.jar;c:\j2sdk1.4.2\lib\msbase.jar;c:\j2sdk1.4.2\lib\msutil;c:\j2sdk1.4.2\lib\tools.jar;c:\j2sdk1.4.2\lib\dt.jar;c:\j2sdk1.4.2\jre\lib\ext;d:\cjdf\web-info\lib;
请高手们给个解决办法