Hi,
I found that using the init() method to set up a database connection
then trying to instantiate a ServletContext object and forward to a jsp
page didn't work.
If placed the database connection code in the doPost() then it DID,
The 2 code sets are attached,
can anyone tell me why?
thanks,
kind regards,
Luke
--
when my computer smiles, I'm happy
===.~ ~,
Luke Vanderfluit |'/']
Mobile: 0421 276 282\~/`
/* A servlet to display the contents Bookmarks database */
import java.io.*;
import java.sql.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class CodeSet1 extends HttpServlet
{
Connection dbcon; // Connection
public String getServletInfo()
{
return Servlet connects to PostgreSQL;
}
// init sets up a database connection
public void init(ServletConfig config) throws ServletException
{
String loginUser = luke;
String loginPasswd = ;
String loginUrl = jdbc:postgresql:bookmarks;
// Load the PostgreSQL driver
try
{
Class.forName(org.postgresql.Driver);
dbcon = DriverManager.getConnection(loginUrl, loginUser, loginPasswd);
}
catch (ClassNotFoundException ex)
{
System.err.println(ClassNotFoundException: + ex.getMessage());
throw new ServletException(Class not found Error);
}
catch (SQLException ex)
{
System.err.println(SQLException: + ex.getMessage());
}
} // end init()
// == POST ==
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
String loginUser = luke;
String loginPasswd = ;
String loginUrl = jdbc:postgresql:bookmarks;
/*// Load the PostgreSQL driver
try
{
Class.forName(org.postgresql.Driver);
dbcon = DriverManager.getConnection(loginUrl, loginUser, loginPasswd);
}
catch (ClassNotFoundException ex)
{
System.err.println(ClassNotFoundException: + ex.getMessage());
throw new ServletException(Class not found Error);
}
catch (SQLException ex)
{
System.err.println(SQLException: + ex.getMessage());
}
*/
String title = request.getParameter(title);
String url = request.getParameter(url);
String descr = request.getParameter(descr);
try
{
// Declare statement
Statement statement = dbcon.createStatement();
String query = insert into bookmark values('
+ title + ', ' + url + ', ' + descr + ');
// Perform update
statement.executeUpdate(query);
statement.close();
}
catch(Exception ex){}
try{ dbcon.close(); } catch(SQLException ignored) {}
ServletContext context = getServletContext();
RequestDispatcher rd = context.getRequestDispatcher(/marksMain.jsp);
rd.forward(request, response);
} //end doPost
}
/* A servlet to display the contents Bookmarks database */
import java.io.*;
import java.sql.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class CodeSet2 extends HttpServlet
{
Connection dbcon; // Connection
public String getServletInfo()
{
return Servlet connects to PostgreSQL;
}
/* // init sets up a database connection
public void init(ServletConfig config) throws ServletException
{
String loginUser = luke;
String loginPasswd = ;
String loginUrl = jdbc:postgresql:bookmarks;
// Load the PostgreSQL driver
try
{
Class.forName(org.postgresql.Driver);
dbcon = DriverManager.getConnection(loginUrl, loginUser, loginPasswd);
}
catch (ClassNotFoundException ex)
{
System.err.println(ClassNotFoundException: + ex.getMessage());
throw new ServletException(Class not found Error);
}
catch (SQLException ex)
{
System.err.println(SQLException: + ex.getMessage());
}
} // end init()
*/// == POST ==
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
String loginUser = luke;
String loginPasswd = ;
String loginUrl = jdbc:postgresql:bookmarks;
// Load the PostgreSQL driver
try
{
Class.forName(org.postgresql.Driver);
dbcon = DriverManager.getConnection(loginUrl, loginUser, loginPasswd);
}
catch (ClassNotFoundException ex)
{
System.err.println(ClassNotFoundException: + ex.getMessage());
throw new ServletException(Class not found Error);
}
catch (SQLException ex)
{
System.err.println(SQLException: + ex.getMessage());
}
String title = request.getParameter(title);
String url = request.getParameter(url);
String descr = request.getParameter(descr);
try
{
// Declare statement
