Java代码如何读取xml文件呢?

Java读取xml文件的实现思路

1.构建一个DocumentBuilderFactory对象
2.传入xml文件流
3.即可读取xml中的节点信息

File file = new File("userdata.xml");
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory
        .newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
Document document = documentBuilder.parse(file);
String usr = document.getElementsByTagName("user").item(0).getTextContent();
String pwd = document.getElementsByTagName("password").item(0).getTextContent();