To answer this we need to know what your logs say, I suspect it is
throwing an exception maybe can't find the JDBC-ODBC driver.
On Tue, 17 Oct 2000 12:10:37 -0400, Ying Sun wrote:
>Hi friends,
>
>I create the data source Books.mdb as a System DSN on my machine,and I
>try to use JdbcServlet to retrieve the data from the Arthurs table.
>
>when I invoke it using http://localhost:8080/servlet/JdbcServlet,it gave
>me blank page.I use java web server2.0.
>
>Can someone give me a idea?
>
>thanks.
>
>import javax.servlet.*;
>import javax.servlet.http.*;
>import java.io.*;
>import java.sql.*;
>
>/**
> * JdbcServlet reads customer information from an ODBC data
> * source and presents it to the client in an HTML table.
> *
> */
>public class JdbcServlet extends HttpServlet
>{
> //database connection is shared by all requests
> static Connection dbConn;
>
> /**
> * init method is called when servlet is initialized.
> * Establishes a database connection when servlet is initially
> * loaded that can be shared across all requests.
> */
> public void init(ServletConfig config) throws
> ServletException
> {
> super.init(config); //pass ServletConfig to parent
>
> try
> {
> //load JDBC-ODBC Bridge driver
> Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
> //establish database connection to Books using ODBC
> dbConn = DriverManager.getConnection(
> "jdbc:odbc:Books");
> }
> catch (ClassNotFoundException e) //Class.forName throws
> {
> System.out.println("JDBC-ODBC bridge not found!");
> return;
> }
> catch (SQLException e) //DriverManager.getConnection throws
> {
> System.out.println("SQL exception thrown in init!");
> return;
> }
> }
>
>
> /**
> * doGet method is called in response to a GET request
> */
> public void doGet(HttpServletRequest request,
> HttpServletResponse response) throws ServletException,
> IOException
> {
> try
> {
> response.setContentType("text/html"); //returns HTML
>
> //get handle to output stream
> PrintWriter out = response.getWriter();
>
> //create statement
> Statement stat = dbConn.createStatement();
> //query database for result set
> ResultSet customers = stat.executeQuery(
> "SELECT AuthorID, FirstName, LastName, YearBorn FROM " +
> "Authors");
>
> //generate HTML document to return to client
> out.println("<HTML>");
> out.println("<HEAD><TITLE>author list</TITLE></HEAD>");
> out.println("<BODY>");
> out.println("<H2>author List</H2>");
> out.println("<TABLE BORDER=1>"); //create an HTML table
> out.println("<TR><TH>Author ID</TH>");
> out.println("<TH>first Name</TH>");
> out.println("<TH>last name</TH>");
> out.println("<TH>year born</TH></TR>");
>
> while (customers.next()) //iterate through all records
> {
> //add a table row for each record
> out.println("<TR><TD>" +
> customers.getInt("AuthorID")+ "</TD><TD>" +
> customers.getString("FirstName") + "</TD><TD>" +
> customers.getString("LastName") + "</TD><TD>" +
> customers.getString("YearBorn") + "</TD></TR>");
> }
>
> out.println("</TABLE>");
> out.println("</BODY></HTML>");
> out.close();
> }
> catch (Exception e)
> {
> e.printStackTrace();
> }
> }
>
> /**
> * Tells the server about this servlet
> */
> public String getServletInfo()
> {
> return "Sample JDBC servlet";
> }
>}
>
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