JSP Database access - Urgent

Question

Hi,
A simple data access program to set values in a db. I have the following problems.
1. When I dont use if(request.getParameter("name")!=null) or any other parameter for testing null values, a row of null values is inserted each time I enter the jsp file.
2. One more problem is that the update is not regular. It sometimes works fine, someother times it fails miserably. It seems that the connection is not closed properly as I receive such a message when I try to shut dwon oracle.
3. A much more peculiar problem, when i paste a url directly into my browser, it runs fine, but not with location.href or a flash link!! eg the register.jsp file is reported as a nonexisting file (HTTP 404) when I provide a link to it from flash in the form http://localhost:8080/reg/register.jsp but when i type this url directly it works fine.
My code for register.jsp is:
<%@ page import="java.io.*,java.lang.*,java.sql.*,java.util.*"%>
<%
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:yogaesh","scott","tiger");
Statement stmt=con.createStatement();
if(request.getParameter("name")!=null)
String str="insert into rt values('" + request.getParameter("name") + "','" + request.getParameter("uname") + "','" + request.getParameter("pass") + "','" + request.getParameter("cpass") + "'," + request.getParameter("age") + ",'" + request.getParameter("sex") + "','" + request.getParameter("add") + "'," + request.getParameter("code") + ",'" + request.getParameter("ugqual") + "'," + request.getParameter("per") + ",'" + request.getParameter("iadd") +"')";
stmt.executeUpdate(str);
stmt.close();
con.commit();
con.close();
con=null;
str=null;
}catch(Exception e){out.println("Database error!!");}
%>
Please help me out and thanks in advance...
R. Yogaesh.

Answer 1

Hi,
A simple data access program to set values in a db. I
have the following problems.
1. When I dont use
if(request.getParameter("name")!=null) or any other
parameter for testing null values, a row of null
values is inserted each time I enter the jsp file. *********
* Yup. Use .equals("") or .equals("null") as tests, depends on your servlet container
2. One more problem is that the update is not regular.
It sometimes works fine, someother times it fails
miserably. It seems that the connection is not closed
properly as I receive such a message when I try to
shut dwon oracle. *************************
Use this:
Connection conn = null;
try{
   //Do database stuff
} catch {
   // Report your errors
} finally{
   try{
     if(conn!= null){
        conn.close();
     }catch{}
3. A much more peculiar problem, when i paste a url
directly into my browser, it runs fine, but not with
location.href or a flash link!! eg the register.jsp
file is reported as a nonexisting file (HTTP 404) when
I provide a link to it from flash in the form
http://localhost:8080/reg/register.jsp but when i type
this url directly it works fine.***********************
Maybe your flash is on another computer/server? Try using the link http://<ip address>:8080/reg/register.jsp or http://<dns name>:8080/reg/register.jsp
My code for register.jsp is:
<%@ page
import="java.io.*,java.lang.*,java.sql.*,java.util.*"%>
<%
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection
con=DriverManager.getConnection("jdbc:odbc:yogaesh","sc
tt","tiger");
Statement stmt=con.createStatement();
if(request.getParameter("name")!=null)
String str="insert into rt values('" +
request.getParameter("name") + "','" +
request.getParameter("uname") + "','" +
request.getParameter("pass") + "','" +
request.getParameter("cpass") + "'," +
request.getParameter("age") + ",'" +
request.getParameter("sex") + "','" +
request.getParameter("add") + "'," +
request.getParameter("code") + ",'" +
request.getParameter("ugqual") + "'," +
request.getParameter("per") + ",'" +
request.getParameter("iadd") +"')";
stmt.executeUpdate(str);
stmt.close();
con.commit();
con.close();
con=null;
str=null;
}catch(Exception e){out.println("Database error!!");}
%>
Please help me out and thanks in advance...
R. Yogaesh.