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Hyder,
On 2/8/15 11:28 PM, Hyder Hashmi wrote:
> When I execute the following code in my project folder, it creates
> the file in my current folder(project folder).
>
> import java.io.File; public class CreateFile{ File f = null; try{ f
> = new File("test.txt"); bool = f.createNewFile();
> System.out.println("File created: "+bool); }catch(Exception e){
> e.printStackTrace(); } }
>
> I am now calling this class in my servlet. The servlet is executing
> perfectly on the tomcat, however, the file is getting created in
> the tomcat's bin folder instead of my project folder placed in the
> webapps.
>
> If I specify the path, then it creates the file on that location ,
> however, that will be hardcoding and will not work on the other
> computer.
1. Use ServletContet.getRealPath("/path/inside/webapp").
2. Don't ever use ServletContext.getRealPath
The reason you shouldn't use getRealPath is because your web
application might not be deployed in an "unexploded" WAR file, and
therefore getRealPath will return null in that case, so you won't be
able to do anything with that path.
Instead, you need to use some other mechanism for writing files. What
do you plan to do with these files once they have been written? If you
intend to serve them back to clients using Tomcat's DefaultServlet,
that usually ends badly due to resource-caching, etc.
We have some servlets that write files to the filesystem for auditing
purposes. We have a configuration file that specifies where those
files should be written, and we load that file on startup. Perhaps
reading from a configuration file, or even from the servlet's
init-params, you can build a correct filesystem path and write your
files there.
- -chris
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=LeVi
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