Java訪問保護域中的檔案

private static Document loadBundle(final ClassLoader loader, final String bundleName) {

        // Next search for a Properties file.
        InputStream stream = (InputStream)java.security.AccessController.doPrivileged(
            new java.security.PrivilegedAction() {
                public Object run() {
                    if (loader != null) {
                        return loader.getResourceAsStream(bundleName);
                    } else {
                        return ClassLoader.getSystemResourceAsStream(bundleName);
                    }
                }
            }
        );

        if (stream != null) {
         try {
    // Create a builder factory
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setValidating(false);

    // Create the builder and parse the file
    Document doc = factory.newDocumentBuilder().parse(stream);
    return doc;
   } catch (SAXException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (ParserConfigurationException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } finally {
                try {
                    stream.close();
                } catch (Exception e) {
                    // to avoid propagating an IOException back into the caller
                    // (I'm assuming this is never going to happen, and if it does,
                    // I'm obeying the precedent of swallowing exceptions set by the
                    // existing code above)
                }
            }
        }
        return null;
    }