I have a class created specially for mysql DB connection (DBUtil.java) and i have a servlet (LoginServlet.java) for login and it is where the query is to be execute. But sadly, it gives me error "NullpointerException" (Error.gif) and point to the line of code "PreparedStatement ps = conn.prepareStatement(sql);"

And now i dunno what's wrong, can someone help?

1) I'm not sure if i using the correct driver and url for my DB, but i tested it before and it connected. Check out DBUtil.java
2) Don't know if there is/are anything wrong with the codes, refer to LoginServlet.java

All required information are in the attachment (Resources.zip)

Thanks in advance.