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
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