Wiring properties file with spring - expanding environment variables

Question

I have a .properties file that I"m reading with a Spring @Component,

@Value("${webapp.external_data_source_root_path}")
private String mExternalDataSourceRootPath;

The .properties file has:

webapp.external_data_source_root_path=[user.home]\/my_path\/

What i'm trying to do is to have it replace [user.home] with the system environment variable value for user.home. I tried changing brackets to curly braces, adding '$', etc, but it doesn't ever seem to expand. Is there a way to do this?

Answer 1

Apparently what I need is:

webapp.destination_data_root_path=${user.home}\/my_path\/

I thought I had tried the ${zzz} pattern, but perhaps I had a typo.