You should always close Connection, Statements and Resultsets in a
finally { }
El 2001.12.01 22:55 Papo Napolitano ha escrit:
> Hi!
>
> I've written the following Servlet to read an Image from a Mysql Database
> and send it to the browser.
>
> public class ImageServlet extends HttpServlet {
> public void doGet(HttpServletRequest request,HttpServletResponse
> response)
> throws ServletException, IOException {
> try {
> InitialContext jndiContext = new InitialContext();
> DataSource ds = (DataSource)jndiContext.lookup("java:/mySQLDS") ;
> Connection conn = ds.getConnection() ;
> Statement stmt = conn.createStatement();
> ResultSet rs = stmt.executeQuery("SELECT image from docs where idx="
> +
> request.getParameter("idx"));
>
> if (rs.next()) {
> response.setContentType("image/gif");
> PrintWriter out = response.getWriter();
> out.println(rs.getString("file" + request.getParameter("idximg")));
> response.flushBuffer();
> }
>
> rs.close();
> stmt.close();
> conn.close();
> ds = null ;
>
> } catch(Exception e){
> response.setContentType("text/html");
> PrintWriter out = response.getWriter();
> out.println("Error: "+e);
> }
> }
> }
>
>
> It works fine, but I've seen that it leaves mysql instances opened in my
> server... Any idea ???
>
> Cheers,
>
> Papo
>
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-- Antoni Reus
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Some relevant FAQs on JSP/Servlets can be found at:
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