java dom解析xml

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1.加载xml文件：

首先生成一个docmentBuilder ：

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

利用io流加载xml：

FileInputStream inputstream = new FileInputStream("f:/hk.xml");

Document doc=builder.parse(inputstream);

将xml转化为字符串：

TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.setOutputProperty("encoding", "utf-8");//格式编码为utf-8
ByteArrayOutputStream bos = new ByteArrayOutputStream();
t.transform(new DOMSource(doc), new StreamResult(bos));
bos.toString();

2.创建xml文件：

首先生成一个docmentBuilder：

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

创建一个新的dom,添加根节点:

Document xmldoc = db.newDocument();

Element root=xmldoc.createElement("root");

. . . . . .

将Element对象转化为字符串：

仿照上面的 xml转化成字符串只需将doc改成root.

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