Getting exception : java.lang.NullPointerException on my jsp page
Question
i am posting my code in which i am getting the java.lang.NullPointerException exception.
<%@ page contentType="text/html;charset=UTF-8" %>
<%@ page errorPage="myError.jsp?from=customers.jsp" %>
<%@ page import="java.sql.*" %>
<html>
<head>
<title>Insurance Quoting System</title>
</head>
<body>
<basefont face="Arial">
<!-- JSP Declarations -->
<%! ResultSet rs = null; %>
<!-- JSP Scriptlet -->
<%
try {
Class.forName("com.mysql.mysql.Driver");
Connection db = DriverManager.getConnection("jdbc:mysql://localhost:3306/quoting","root","root");
Statement s = db.createStatement();
rs = s.executeQuery("select * from customer");
}
catch (Exception e) {
// For now, just report the error to the system log
System.out.println(e.toString());
}
%>
<!-- Template text -->
<table width="550" border="0" align="center">
<tr>
<td bgcolor="#006633">
<div align="center">
<font size="6" color="#FFFFFF">
<b>Insurance Quoting System</b>
</font>
</div>
</td>
</tr>
<tr>
<td>
<p> </p>
<p> </p>
<p align="center"><b>Customers</b></p>
<table width="290" border="0" align="center">
<%
try {
while (rs.next()) {
%>
<!-- JSP Expressions used within template text -->
<tr>
<td width="20"><%= rs.getInt(1) %></td>
<td width="70"><%= rs.getString(2) %></td>
<td width="70"><%= rs.getString(3) %></td>
<td width="40">
<a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=edit">
edit
</a>
</td>
<td width="40">
<a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=delete">
delete
</a>
</td>
<td width="40">
<a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=newQuote">
new quote
</a>
</td>
</tr>
<%
}
}
catch (SQLException e) {
// For now, just report the error to the system log
System.out.println(e.toString());
}
%>
</table>
</td>
</tr>
<tr>
<td>
<p> </p>
<p align="center"><a href="custMaint.jsp?action=add">New Customer</a></p>
</td>
</tr>
</table>
</body>
</html>
i am making one jsp page its giving some error java.lang.NullPonterException on my jsp page pls tell me the ans if any one have .
1 answers
solution1
0 2013-02-20 15:43:42
The only thing I can think of that is causing this is that you are catching an exception in your first try-catch block and then trying to use the ResultSet as if it's been initialized, but it's still null, so you are getting NPE. Check to see if your Database operations work correctly.
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