Problem in JDBC connection to database

Hi,
I m new to JDBC. I want to retrive some data from the database in my JSP page. How do i do it ??? I written a following code,
String custid = null;
String custname = null;
String custref = null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@<server>:1521:yoda","scott","tiger");
Statement stmt = conn.createStatement();
String strCustomer = "select customer_id from fmm_user_access where login_id = '" + username + "';";
ResultSet rset = stmt.executeQuery(strCustomer);
while (rset.next())
custid = rset.getString(1);
custref = "1."+custid;
strCustomer = "select full_name from fmm_ofin_customers where customer_ref ='"+ custref + "'";
ResultSet rset1 = stmt.executeQuery(strCustomer);
while (rset1.next())
custname = rset1.getString(1);
conn.close();
} //try
catch (Exception e) {e.getMessage();}
Are there any setup issues which i m missing, like setting some paths. Please advise.
Thanks in advance
Unmesh

Hi Unmesh,
I did not see any code in your JSP page which is printing the output of your query.
You may want to modify your JSP to display the results like this
<%@ page import="java.sql.*" %>
<HTML><BODY>
<%
strCustomer = "select full_name from fmm_ofin_customers where customer_ref ='"+ custref + "'";
ResultSet rset1 = stmt.executeQuery(strCustomer);
while (rset1.next())
custname = rset1.getString(1); %>
Customer Name is <%=custname%>
<BR>
<% }
conn.close();
........... %>
</BODY></HTML>
And you will need to ensure that the JDBC drivers( classes12.jar or ojdbc14.jar) are in your classpath.
A couple of other observations I have about your code is
1. You must explicitly close the ResultSet and Statement objects after you finish using them: rset.close();stmt.close()
2. Try using PreparedStatements for your insert statements which allows you to define bind parameters. In your case -
PreparedStatement pstmt =
conn.prepareStatement ("select customer_id from fmm_user_access where login_id = ?");
pstmt.setString (1, userName);
You can refer to JDBC samples on OTN for more information : http://otn.oracle.com/sample_code/tech/java/sqlj_jdbc/content.html
Hope this helps.
Sujatha.

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