How to edit the content of an application.properties or application.yml file inside an existing jar on a remote Linux server

Question

How to edit a property file (like application.properties) inside of an existing jar file on a remote Linux server.

Imagine the jar is located in /home/user/my-spring-boot.jar and I like to change the username inside of application.propertires from

username=foo 

to

username=bar 

How to open the file and change the property?

Answer 1

A .jar file is simply a .zip file with a different extension, and vim can edit zip files and their contents directly! Simply vim your .jar, use the file navigator to find your properties file and change it. vim will maintain the zip with your edits.

See here for more details.