writing a file from a servlet

[Jerry Ford]

From a servlet implemented in 
tomcat/webapps/myWebapp/WEB-INF/classes/my/package/myWebapp.class, I am 
trying to write a config file to the directory myWebapp/conf.   The conf 
directory does exist; and there are no permissions issues---I can write 
the file to the conf directory from the servlet if I hardcode the full path.

The following code works:

FileWriter fwrite;

try
{
   fwrite = new 
FileWriter("/usr/local/webserver/tomcat/webapps/myWebapp/conf/" + 
project + ".conf");
 // ...etc.
}
catch(IOException e)
{
   // ... etc.
}

But if I change the path in fwrite = new FileWriter() to 
../../../../conf/ (making it relative to the class file) or to 
/myWebapp/conf/ (relative to tomcat's servlets root; with or without the 
leading /) or to conf/ (relative to the myWebapp directory, which is the 
docBase declared in the context element in server.xml), I get a 
FileNotFound (No such file or directory) exception.

How do I make the path relative to the servlet, so I don't have to hard 
code the path?

The app won't be deployed on a public web server, so writing a file to 
the server is not a problem, though I would like to have some 
flexibility about where things get deployed---may end up on a Windows 
machine, may stay on the Linux box.  But I want to make that decision 
external to the code.

Thanks.

Jerry

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