Read a file in Java from classpath, absolute path, relative path that includes “../..” path

Question

Before marking this a duplicate, please read! I have searched SO and other repositories for this solution.

The below Spring API works if filepath is absolute path file://some/path or if its a path in the Classpath /some/class/path . However, this API fails to handle relative path that includes "../".

File f = new DefaultResourceLoader().getResource(filepath).getfile();

I have been working around this issue by falling back to the below if the above fails -

File f = new File(filepath)

Is there a way to avoid this fallback logic and use a file API that works irrespective of file path?

The other solution I came across that suggests using getClass().getResource() also requires fallback API to deal with absolute/relative paths.

Answer 1

File absolute = new File(filepath).getAbsoluteFile();

And use further what works well:

The below Spring API works if filepath is absolute path file://some/path