The server encountered an internal error () that prevented it from fulfilling th
急求！！！！请各位大侠帮帮忙，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: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:426)
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.WebRoot.EnterPage.judge_jsp._jspService(judge_jsp.java:113)
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:384)
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/6.0.10 logs.
源代码：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
<%
String userName = request.getParameter("number");
String password = request.getParameter("password");
String str1 = null;
//out.println(userName);
Statement st = null;
Connection con = null;
ResultSet rs = null;
int i = 0;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:sun");
st = con.createStatement();
String sql = "select * from userInformation";
rs = st.executeQuery(sql);
while(rs.next()){
String str = rs.getString(2);
if(str.equals(userName) && str.equals(password))
{
str1 = str;
i ++;
}
}
if(i == 0)
{
String s = "您输入的用户名或密码错误";
String errorInfo = new String(s.getBytes("GB18030") , "ISO-8859-1");
response.sendRedirect("EnterPage.jsp?errorInfo=" + errorInfo);
}
else if(i == 1)
{
response.sendRedirect("/StudentSystem/TheMainPage/TheMainPage.jsp");
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
finally{
try {
rs.close();
st.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
%>
</body>
</html>
在别人的电脑上能运行，我怀疑我的配置有问题tomcat6.0+Myeclipse+sql 2000
[最优解释]
空指针异常。
别人电脑上能运行说明代码没有问题。
所以应该是数据库连接配置问题。
st = con.createStatement(); 估计是con为null导致异常。debug和system.out一下，很容易就能看出来的
[其他解释]
你抓的异常信息还不到点，看不出异常根。
除开数据库连接可能除问题之外，你不能直接访问这个页面，否则
String userName = request.getParameter("number");
String password = request.getParameter("password");