File file = new File("test.xml");
        try {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            documentBuilderFactory.setValidating(false);
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            Document document = documentBuilder.parse(file);

            document.getDocumentElement().normalize();

            org.w3c.dom.Element date = document.getDocumentElement();

            System.out.println("Корневой элемент: " + date.getNodeName());
            System.out.println("--------------------");


            NodeList weeks = date.getElementsByTagName("week");
            NodeList week = weeks.item(1).getChildNodes();
            NodeList day = week.item(1).getChildNodes();

            System.out.println(weeks.item(1).getAttributes().getNamedItem("day"));
            System.out.println(day.item(1).getAttributes());