XML 使用Stax 创建xml文档及通过Transformer修改文档内容
xml文件放在src目录下
book.xml:
?
<?xml version="1.0" encoding="UTF-8"?>
?
<bookstore>
?
<book category="COOKING">
? <title lang="en">Everyday Italian</title>
? <author>Giada De Laurentiis</author>
? <year>2005</year>
? <price>30.00</price>
</book>
?
<book category="CHILDREN">
? <title lang="en">Harry Potter</title>
? <author>J K. Rowling</author>
? <year>2005</year>
? <price>29.99</price>
</book>
?
?
<book category="WEB">
? <title lang="en">Learning XML</title>
? <author>Erik T. Ray</author>
? <year>2003</year>
? <price>39.95</price>
</book>
?
</bookstore>
?
?
?
创建文档：
// 基于Stax的文档创间
?@Test
?public void createXml01() {
??try {
???XMLStreamWriter writer = XMLOutputFactory.newInstance()
?????.createXMLStreamWriter(System.out);
???writer.writeStartDocument("UTF-8", "1.0");
???writer.writeEndDocument();
???String ns = "http://11:dd";
???writer.writeStartElement("nssss", "person", ns);
???writer.writeStartDocument(ns, "id");
???writer.writeCData("1");
???writer.writeEndElement();
???writer.writeEndElement();
???writer.flush();
???writer.close();
??} catch (XMLStreamException e) {
???e.printStackTrace();
??} catch (FactoryConfigurationError e) {
???e.printStackTrace();
??}
?}
修改文档：
// 通过Transformer修改
?@Test
?public void updateXml() {
??InputStream stream = null;
??stream = TestStax.class.getClassLoader()
????.getResourceAsStream("book.xml");
??// 创建文档处理对象
??DocumentBuilder builder = null;
??try {
???builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
???// 通过DocumentBuilder创建文档对象
???Document document = builder.parse(stream);
???// 创建XPath
???XPath xPath = XPathFactory.newInstance().newXPath();
???Transformer transform = TransformerFactory.newInstance().newTransformer();
???
???transform.setParameter(OutputKeys.ENCODING, "UTF-8");
???
???NodeList nodeList = (NodeList) xPath
???.evaluate("//book[title='Learning XML']", document,
?????XPathConstants.NODESET);
???//获取price节点
???Element be = (Element)nodeList.item(0);
?? //获取price? 把它修改成3000.00
???Element e = (Element)(be.getElementsByTagName("price").item(0));
???e.setTextContent("3000.00");
???
???Result result = new StreamResult(System.out);
???//通过Transformer修改
???transform.transform(new DOMSource(document),result);
???
??} catch (Exception e) {
???e.printStackTrace();
??}
?}
}
?
结果显示：
?
<?xml version="1.0" encoding="UTF-8" standalone="no"?><bookstore>
?
<book category="COOKING">
? <title lang="en">Everyday Italian</title>
? <author>Giada De Laurentiis</author>
? <year>2005</year>
? <price>30.00</price>
</book>
?
<book category="CHILDREN">
? <title lang="en">Harry Potter</title>
? <author>J K. Rowling</author>
? <year>2005</year>
? <price>29.99</price>
</book>
?
?
<book category="WEB">
? <title lang="en">Learning XML</title>
? <author>Erik T. Ray</author>
? <year>2003</year>
? <price>
3000.00</price>
</book>
?
</bookstore>
