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Accessing Oracle tables from a web page
I am in the process of creating a small application where a person would
choose from a list of state codes, press a submit button, and then access
an Oracle table to return all area codes for that state.
I have just started programming in Java and HTML, so I don't know enough
yet on how to go about programming this.
The page was created in Web Factory. We have Java, Unix, and oracle here.
If anyone out there could point me in the right direction, it would be much
appreciated.
Thanks
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Re: Accessing Oracle tables from a web page
I'm assuming that this is being developed for the web...and since you have
java I'm also assuming that you can process servlets and jsp files...
I would write a servlet, and use JDBC to connect to the oracle database and
then display the appropriate results. A simple example of how this is done
is as follows:
//*****************************************************************
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ClassName extends HttpServlet {
public void doGet (HttpServletRequest req, HttpServletResponse res) throws
ServletException, IOException
{
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
res.setContentType("text/html");
PrintWriter out = res.getWriter();
try {
// load and therefore register the MySQL Driver
Class.forName("org.xxx.xx.mysql.Driver");
// get a connection to the db
con =
DriverManager.getConnection("jdbc:mysql://www.xx.xxxxxx.com:1212/secur1?user
=SystemAdmin&password=Password");
// Create a statement object
stmt = con.createStatement();
// execute a sql query, get a resultset
rs = stmt.executeQuery("SELECT Employee_ID, First_Name, Last_Name FROM
tbl_Employee_file;");
// start writing the html
out.println("<HTML><head><title>This is my title</title></head>");
out.println("<body>");
out.println("<table>");
// interate through the resultset and display the contents
while(rs.next()) {
out.println("<tr><td>" + rs.getString("Employee_ID") + " </td><td> " +
rs.getString("First_Name") + " </td><td> " + rs.getString("Last_Name") +
"</td></tr>");
}
out.println("</table>");
out.println("</html>");
}
catch(ClassNotFoundException e) {
out.println("Couldn't load the db driver: " + e.getMessage());
}
catch(SQLException e) {
out.println("SQLException caught.: " + e.getMessage());
}
finally {
try {
if (con != null) con.close();
}
catch (SQLException ignored) { }
}
}
}
//**************************************************************************
*******************************
This should at least get you started. Look in sun's site for additional
help on the matter. Hope that this helps.
"Serge" <serge.small@wcom.com> wrote in message
news:3a67469b@news.devx.com...
>
> I am in the process of creating a small application where a person would
> choose from a list of state codes, press a submit button, and then access
> an Oracle table to return all area codes for that state.
> I have just started programming in Java and HTML, so I don't know enough
> yet on how to go about programming this.
> The page was created in Web Factory. We have Java, Unix, and oracle here.
> If anyone out there could point me in the right direction, it would be
much
> appreciated.
> Thanks
-
Re: Accessing Oracle tables from a web page
I forgot one thing (at least)...
// you can grab the state code in the servlet with this statement
String State_Code = req.getParameter("ST")
// where ST is the name of the combobox or whatever control lists the state
codes
"John Butorac" <jbutorac@nlamerica.com> wrote in message
news:3a677410@news.devx.com...
> I'm assuming that this is being developed for the web...and since you have
> java I'm also assuming that you can process servlets and jsp files...
>
> I would write a servlet, and use JDBC to connect to the oracle database
and
> then display the appropriate results. A simple example of how this is
done
> is as follows:
>
> //*****************************************************************
> import java.io.*;
> import java.sql.*;
> import javax.servlet.*;
> import javax.servlet.http.*;
>
>
> public class ClassName extends HttpServlet {
>
> public void doGet (HttpServletRequest req, HttpServletResponse res)
throws
> ServletException, IOException
> {
> Connection con = null;
> Statement stmt = null;
> ResultSet rs = null;
>
> res.setContentType("text/html");
> PrintWriter out = res.getWriter();
>
> try {
> // load and therefore register the MySQL Driver
> Class.forName("org.xxx.xx.mysql.Driver");
>
> // get a connection to the db
> con =
>
DriverManager.getConnection("jdbc:mysql://www.xx.xxxxxx.com:1212/secur1?user
> =SystemAdmin&password=Password");
>
> // Create a statement object
> stmt = con.createStatement();
>
> // execute a sql query, get a resultset
> rs = stmt.executeQuery("SELECT Employee_ID, First_Name, Last_Name FROM
> tbl_Employee_file;");
>
> // start writing the html
> out.println("<HTML><head><title>This is my title</title></head>");
>
> out.println("<body>");
> out.println("<table>");
>
> // interate through the resultset and display the contents
> while(rs.next()) {
> out.println("<tr><td>" + rs.getString("Employee_ID") + " </td><td> " +
> rs.getString("First_Name") + " </td><td> " + rs.getString("Last_Name") +
> "</td></tr>");
> }
>
> out.println("</table>");
> out.println("</html>");
> }
>
> catch(ClassNotFoundException e) {
> out.println("Couldn't load the db driver: " + e.getMessage());
> }
>
> catch(SQLException e) {
> out.println("SQLException caught.: " + e.getMessage());
> }
>
> finally {
> try {
> if (con != null) con.close();
> }
> catch (SQLException ignored) { }
> }
> }
> }
>
//**************************************************************************
> *******************************
>
>
> This should at least get you started. Look in sun's site for additional
> help on the matter. Hope that this helps.
>
>
>
>
>
> "Serge" <serge.small@wcom.com> wrote in message
> news:3a67469b@news.devx.com...
> >
> > I am in the process of creating a small application where a person
would
> > choose from a list of state codes, press a submit button, and then
access
> > an Oracle table to return all area codes for that state.
> > I have just started programming in Java and HTML, so I don't know
enough
> > yet on how to go about programming this.
> > The page was created in Web Factory. We have Java, Unix, and oracle
here.
> > If anyone out there could point me in the right direction, it would be
> much
> > appreciated.
> > Thanks
>
>
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