Access environment variable from java servlet
environment-variables, java, servlets, tomcat
Solution
If you want to retrieve os environment variable use System.getenv() Method.
public static Map<String,String> getenv()
Returns an unmodifiable string map view of the current system environment. The environment is a system-dependent mapping from names to values which is passed from parent to child processes.
Problem
I would like to know if there is any way I can access an environment variable from a java servlet. I know that I can pass params to the servlet using web.xml but I need to pass some value at run-time. The requirement is something like this - A non-web based app running at the server side sets some value (environment variable) and it has to be accessed during a web session (from the servlet). I am using apache web server. I am new to web based programming, so forgive me if I am asking something silly/stupid.