import javax.faces.application.ResourceWrapper; //导入依赖的package包/类
@Override
public Resource createResource(final String resourceName, final String libraryName, final String contentType) {
    final Resource resource = super.createResource(resourceName, libraryName, contentType);

    if (resource == null) {
        return null;
    }

    return new ResourceWrapper() {

        @Override
        public String getRequestPath() {
            final String path = super.getRequestPath();
            if (path.indexOf(getLibrary()) >= 0) {
                return path + getVersion();
            } else {
                return path;
            }
        }

        @Override
        // Necessary because this is missing in ResourceWrapper (will be
        // fixed in JSF 2.2).
        public String getResourceName() {
            return resource.getResourceName();
        }

        @Override
        // Necessary because this is missing in ResourceWrapper (will be
        // fixed in JSF 2.2).
        public String getLibraryName() {
            return resource.getLibraryName();
        }

        @Override
        // Necessary because this is missing in ResourceWrapper (will be
        // fixed in JSF 2.2).
        public String getContentType() {
            return resource.getContentType();
        }

        @Override
        public Resource getWrapped() {
            return resource;
        }
    };
}