Writing to a file through Servlet

[Rohit Malhotra]

Hi,

I want to log all the events in the application into a file log.txt
How can a write to a file through a servlet. I do need the absolute path of the file. like for example the file is in docs folder of the base directory of my application project.

BASE_DIR
- WEB-INF/CLASSES
- WEB-INF/Web.xml
- SRC
- DOCS/Log.txt

How can i write to this file log.txt through my Servlet?
Thanking in advance,

[Vishnu Prakash]

ServletContext has a log methods with which you can log events to files.

You also get log methods in your servlet through GenericServlet-->HttpServlet.

For absolute path you can use getRealPath() from ServletContext. But this method will return null if you pack your application as a war file.

[Adeel Ansari]

In addition, Filters meant for these kinda stuff. You can also go for some libraries like Log4J or jakarta commons logging. And you can always search the web for some working examples.