Where to put data or config files loaded by my Java code when web app launches in a Vaadin 14 web app driven by Maven

Question

In a Vaadin 14 web app project created by the \"Plain Java Servlet\" flavor of the Vaadin Starter page, there are numerous folders automatically created by the Maven POM fil

Answer 1

Location of file

You put them in src/main/resources as it is the convention also outside of a Vaadin application.

Vaadin adds several other resource roots for things that later end up in places in the jar, that are conventient for vaadin to find (e.g. under META-INF/resources/...).

resources still ends up in the root of the jar or get properly "classpathed" by the build-tools and is safe to load non-classes via the classloader in your application.

Opening file

You can open your text file from there by calling Class::getResourceAsStream, returning an InputStream. Note the leading slash character.

InputStream inputStream = this.getClass().getResourceAsStream( "/myfile.txt" ) ;