How to Access Resources in the WEB-INF Folder of a WAR File?

Accessing Resources in the WEB-INF Folder

In web applications, deployed as WAR files, it's essential to access resources stored in the war/WEB-INF folder. This question explores how to construct paths to such resources for use with File().

Answer

To obtain the full system path to a resource in the WEB-INF folder, consider the following options:

• getRealPath() Method:

  ServletContext context = getContext();
  String fullPath = context.getRealPath("/WEB-INF/test/foo.txt");

  Note that this requires the WAR file to be expanded (not as a single .war file).

• getResource() Method:

  ServletContext context = getContext();
  URL resourceUrl = context.getResource("/WEB-INF/test/foo.txt");

  This can be used to obtain either the URL or InputStream of the resource.

Alternatively, if you just want the InputStream of the resource:

InputStream resourceContent = context.getResourceAsStream("/WEB-INF/test/foo.txt");

By using either of these methods, you can access resources stored in the WEB-INF folder, regardless of whether the WAR file is expanded or not.

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