Where to put static files for Spark Web Framework?

First you have to tell Spark where to search for the static files like this:

Spark.staticFiles.location("/public");

In Spark versions prior to 2.5, you should use:

Spark.staticFileLocation("/public");

Then your project should have a public folder under the resources folder like this

/src/main/resources/public/style.css

For example I added a style.css file there, so you should then access it like this:

http://localhost:4567/style.css

If you want to serve a non-classpath folder, then you should use

Spark.staticFiles.externalLocation("/path/to/dir");

In Spark versions prior to 2.5, you should use:

Spark.externalStaticFileLocation("/path/to/dir");