①DOM
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance() DocumentBuilder db = dbf.newDocumentBuilder() Document document = db.parse(文件流、输入流或者url地址) Document ____________文档类 NodeList ____________节点集合类 Node ________________节点类(也可以是属性类) NamedNodeMap_________属性集合 DocumentBuilderFactory dbf = DocumentBuilderF