pass environment variable to jar as command line arguments

Question

I am running a jar which reads from properties in code. Now i want to set few variables at environment level and pass them as command line arguments to override properties. How can i do that?

ex:

java -jar test.jar  --server.http.host-url=https://x.com

in the above command, property value server.http.host-url is set as env variable with name "server.http.host.value". how do i pass it as variable so it will resolved from env variables like this

java -jar test.jar  --server.http.host-url=${server.http.host.value}

You can create a shell or bat script based on your os. Fetch those property values from the script and start the jar. — Saurabh
– Saurabh, Commented Sep 16, 2020 at 10:15

Hilario Fernandes · Accepted Answer · 2020-09-16 10:31:39Z

4

Depending on the shell you are using the environment variable names might have different restrictions, but in most cases . is not allowed so name your variable something like SERVER_HTTP_HOST_VALUE for example and use it like this:

java -jar test.jar --server.http.host-url=$SERVER_HTTP_HOST_VALUE

answered Sep 16, 2020 at 10:31

Hilario Fernandes

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