I see why you want to write to a buffer to ultimately determine and provide
the
content length of the served page.
Why don't you try this instead
public class MessageServlet extends HttpServlet //implements
SingleThreadModel - don;t need to be single threaded for this
{
// private ServletConfig config; = no need to store this, your parent
does.
// you don;t seem to need this method since you do nothing with the
config
//public void init (ServletConfig config) throws ServletException
//{
// super.init(config);
// this.config = config;
//}
// no need to overide this method.
//public void destroy() {} // do nothing
// no need to overide this method.
//public ServletConfig getServletConfig()
//{
// return config;
//}
public String getServletInfo()
{
return "User Interface Servlet"
}
public void doPost (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
res.setContentType( "text/html" );
StringBuffer html = new StringBuffer();
html.append( "<html>" );
html.append( "<head>" );
html.append( "<title> Message </title>" );
html.append( "</head>" );
html.append( "<body>" );
html.append( "Hello World!" );
html.append( "</body>" );
html.append( "</html>" );
res.setContentLength(html.length());
PrintWriter out = res.getWriter();
out.println(html.toString());
// no need to flush nor close
}
}
At 11:39 AM 4/6/99 +0200, you wrote:
>Thanks for your reply. But that was not the reason of my problem. I
>tried to write a servlet beeing as simple as possible:
>
>package de.medigration.telechiv.UI_Servlets;
>
>/*
> * Imports
> */
>import java.io.*;
>import java.util.Date;
>import javax.servlet.*;
>import javax.servlet.http.*;
>
>public class MessageServlet extends HttpServlet
> implements SingleThreadModel {
> private
> ServletConfig config;
>
> public void init (ServletConfig config)
> throws ServletException {
> this.config = config;
> }
>
> public void destroy() {} // do nothing
>
> public ServletConfig getServletConfig() {
> return config;
> }
>
> public String getServletInfo() {
> return "User Interface Servlet"
> }
>
>
> public void doPost (HttpServletRequest req, HttpServletResponse
>res)
> throws ServletException, IOException {
>
> /* Create Output Writer */
> res.setContentType( "text/html" );
> ByteArrayOutputStream outBuffer = new ByteArrayOutputStream
>(255);
> PrintWriter out = new PrintWriter(outBuffer, true);
>
> /* Write Head of HTML-Page */
> out.println( "<html>" );
> out.println( "<head>" );
> out.println( "<title> Message </title>" );
> out.println( "</head>" );
>
> out.println( "<body>" );
>
> out.println( "Hello World!" );
>
> out.println( "</body>" );
> out.println( "</html>" );
>
> res.setContentLength(outBuffer.size());
> outBuffer.writeTo(res.getOutputStream());
> out.close();
> }
>}
>
>
>> -----Urspr�ngliche Nachricht-----
>> Von: Ross J.P. Ethier [SMTP:[EMAIL PROTECTED]]
>> Gesendet am: Dienstag, 6. April 1999 08:35
>> An: Java-Servlets
>> Betreff: Re: Repy time of the HTML POST command
>>
>> Its hard to determine why your page takes so long. Perhaps providing
>the
>> source may help.
>>
>> A performance tip is to use a StringBuffer to append the html instead
>of
>> using the '+' operand.
>>
>> instead of
>> out.println( "<html>" + "<body>" + "hello" + "</body>" +
>"</html>");
>> use
>> out.println( new StringBuffer("<html>").append("<body>"
>> ).append("hello").append("</body>" ).append("</html>").toString());
>>
>> Internally the JVM turns every '+' call into a two part StringBuffer
>which
>> can be expensive.
>>
>> Good Luck
>> Ross
>>
>> At 05:00 PM 3/31/99 +0200, you wrote:
>> >Hello,
>> >
>> >I wrote a servlet which is started as a 'startup servlet' (I proved,
>> >that it is initialized only once!). This servlet is invoked by a HTML
>> >POST command from a browser (HTML form). It generates a new HTML page
>> >using the 'PrintWriter'-class. My problem:
>> >
>> >IT LASTS 5 SECONDS FROM SUBMITTING THE FORM TO GETTING THE RESPONSE.
>> >(Although browser and server are running on the same PC)
>> >
>> >Is this an usual delay? How can I get a better performance?
>> >
>> >(I used the APACHE1.3.4 server , ApacheJServ1.0b1 and JSDK 2.0 with
>> >WindowsNT 4.0)
>> >
>> >Best regards
>> >
>> >Burkhard Schaefer
>> >
>> >
>> >____________________________________________________________
>> >
>> >Medigration GmbH Tel.: (++49) 09131-690-87-47
>> >Am Weichselgarten 7 Fax: (++49) 09131-690-8750
>> >D-91058 Erlangen www.medigration.de
>> >GERMANY
>> >
>> >
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>> >
>>
>>
>>
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