dom4j 读取xml

xml文件：

<wc:COLLECTION xmlns:wc="http://www.ptc.com/infoengine/1.0">
<Unknown-Class-Name NAME="output" TYPE="Unknown" STATUS="0">
  <wc:INSTANCE>
    <result>ok</result>
    <data>铭牌KFR-26GW$DY-PC400(D13).PM-1.pdf,377.04</data>
  </wc:INSTANCE>
</Unknown-Class-Name>
</wc:COLLECTION>

代码：

        SAXReader saxReader = new SAXReader();
        Document document;
        try {
            document = saxReader.read(new File("test.xml"));
            Node node = document.selectSingleNode("//*/data");
            System.out.println(node.getText());
        } catch (DocumentException e) {
            e.printStackTrace();
        }             

需要的jar包：