hi Edward,
Its an enigma really.Please send me your complete
code.
Bye
--- Edward <zhangsc@n...> wrote:
> Hello.
> I have a question,it is very puzzle to me.I have
> a class named PreReadError,it works well,it can read
> data from the file "error.data".For example:
>
> ...
> public static void main()
> {
> String str;
> PreReadError test=new PreReadError();
> //notice here
> str=(String )test.getTable("Error0");
> System.out.println("Found Error0");
> System.out.println("It's value is "+str);
> ...
> }
>
> It works well.When I run it,it will show:
> Found Error0
> It's value is 3
>
> But when I use this class "PreReadError" in a
> servlet,for example:
>
> ...
> public class GetUserIdentity extends HttpServlet
> {
> public void doPost(HttpServletRequest
> request,HttpServletResponse response)
> throws ServletException,IOException
> {
> PreReadError test=new PreReadError();
> PrintWriter out=response.getWriter();
> out.println("<html>");
> out.println("<body>");
> //notice here
> String str=(String )test.getTable("Error0");
> out.println("<p> It's value is "+str+"</p>");
> ....
> }
>
> When I run GetUserIdentity,it should show:
> It's value is 3
> But I got another result,it shows:
> It's value is null
>
> I put my files in follows:
> I use Apache Tomcat4.0 again,I install Apache
> Tomcat4.0 into D:\Program Files\Apache Tomcat4.0
> I put my class GetUserIdentity.class and
> PreReadError.class into follows folds:
> I put them into D:\Program Files\Apache
> Tomcat4.0\Webapps\examples\WEB-INF\classes
> then I also put the file error.txt into D:\Program
> Files\Apache
> Tomcat4.0\Webapps\examples\WEB-INF\classes
> when I run it ,I can't get proper result.If the
> error.txt location is false,where it should be? I'm
> a newbie of JavaServlet,would you give me detailed
> steps to correct it?
> Please help me!
> Thanks in advances!
> Edward
>
=====
Engr. Rana Imran Mahmoodirana_ned@y..., irana_ned@h...
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