Java applet coonectivity to ms access

Question

Hi friend i'm new to sun forums. Java applet troubling me a lot while i try to coonect it with ms access. the code of the program is as follows:-
Ao.java
import java.sql.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
<applet code="Ao" width=250 height=200>
</applet>
public class Ao extends Applet implements ActionListener,ItemListener
String msg="";
Button view,delete,create,edit,reapp,exit;
TextField M_head;
int x,i,ans=0,flag;
public void init()
setLayout(new FlowLayout(FlowLayout.CENTER,50,3));
view = new Button("view");
delete = new Button("delete");
create = new Button("create");
edit = new Button("edit");
reapp = new Button("reapp");
exit= new Button("exit");
M_head = new TextField(15);
add(view);
add(delete);
add(create);
System.out.println("");
add(edit);
add(reapp);
add(exit);
System.out.println("");
add(M_head);
view.addActionListener(this);
delete.addActionListener(this);
create.addActionListener(this);
edit.addActionListener(this);
reapp.addActionListener(this);
exit.addActionListener(this);
M_head.addActionListener(this);
public void actionPerformed(ActionEvent ae)
String str=ae.getActionCommand();
if(str.equals("view"))
{msg ="1";}
if(str.equals("delete"))
{msg ="2";}
if(str.equals("create"))
{msg ="3";}
if(str.equals("edit"))
{msg ="4";}
if(str.equals("reapp"))
{msg ="5";}
if(str.equals("exit"))
{msg ="6";}
if(msg=="3")
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String filename = "D:/budget/mbdTest1.mdb";
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mbd)};DBQ=";
database+=filename.trim();
String head = M_head.getText();
String head1 = head.trim();
Connection con = DriverManager.getConnection(database ,"","");
Statement doo = con.createStatement();
String vi ="create table "+head1+" (Reapporder integer, Amount integer)";
doo.execute(vi);
catch(Exception err)
System.out.println("Error :"+err);
public void itemStateChanged(ItemEvent ie)
repaint();
public void paint(Graphics g)
g.drawString(msg,70,200); //No use
g.drawString("ANSWER=",6,200); // No use
I run it with a ao.txt file which contain the grant permission information:-
Ao.txt
grant {
permission java.lang.RuntimePermission
"accessClassInPackage.sun.jdbc.odbc";
permission java.util.PropertyPermission
"file.encoding", "read";
My database is in the same directory as in my .java file with the name mbdTest1.mdb ( A system dsn)
I run it with the following command:-
appletviewer -J-Djava.security.policy=Ao.txt Ao.java
applet run succesfully but when i enter some data in text box and click on create button it shows an Error java.sql.SQLException: data source name not found and no default driver specified.
help needed and thanks in advance

Answer 1

>
I'm unable to understand the archieve="accessdriver.jar">It is archive, archive (only one 'e'). These things need to be correct for any hope of working!
And while we are on the subject, the word is 'connect', not 'coonect'.
But anyway, what I meant by accessdriver.jar, is simply the Jar that contains the sun.jdbc.odbc.JdbcOdbcDriver ..
Oh, wait a second. I did not look at that classname closely, and did not realise it was a 'sun' class. It is more common to add a 3rd party DB driver class (AFAIU) than use a 'Sun proprietary API' class to access a DB.
>
As far as security file is concerned i will first try to run the applet so that it is able to create and query
data from my ms access database after than i can modify it.>You seem very confused about accessing the DB. Noting that your original code uses a hard coded (file based) path to the DB, I can tell you you are wasting time attempting to access it that way. That will never work when the applet is on the web, since the File path will point to a place on the end user's PC file system that does not have a DB installed! The applet will need to be redesigned.
I recommend you download and install a local server like tomcat, which can more accurately reflect a web environment. Then do all your applet testing via the local server.
1st, before you bother with the applet, you should organise how to access the DB (at least tot the point of doing a simple query) in a web page. Before going any further. This will ensure that the DB is set-up correctly and accessible to a sand-boxed applet.
Your comment about "..will first try to run the applet.. (before) ..modify it". If it is a security matter, it will need to be signed before you can even query the DB. If the applet can be sand-boxed (probably the case) then don't sign it at any time.