wro4j-core/src/main/java/ro/isdc/wro/util/WroUtil.java
public static final String normalize(final String path) {
    final String normalized = FilenameUtils.normalize(path);
    return replaceWithServletContextSeparatorIfNedded(normalized);
  }
public static final String normalize(final String path) {
    final String normalized = FilenameUtils.normalize(path);
    return replaceWithServletContextSeparatorIfNedded(normalized);
  }
Similar to {@link FilenameUtils#normalize(String)}, but fixes the problem with Windows platform for situations
when the path starts with "/" (servlet context relative resources) which are resolved to "\" on windows.

@param path
to compute filePath from.
@return full path from the provided path.