[Solved] Java Maven reference files in WebApp

Always remember that Maven’s policy is convention over configuration.
That being said, in your case, while using Maven, you need to follow the Maven Standard Directory Structure.
Create a directory structure like src/main/java and put your package(s) in the java folder.
For any resources, create a folder structure like src/main/resources and put your resources in the resources folder.
After you do this, lets say that there is a file named readme.txt inside src/main/resources directory, then you can simple access this file using:
File file = new File("readme.txt");
Maven will always treat src/main/resources as the root for any resources.
Another example is lets say you have a a file name hello.txt in src/main/resources/somefolder/hello.txt then you can access it using:
File file = new File("somefolder/readme.txt");