本文主要是介绍XML 使用Stax 创建xml文档及通过Transformer修改文档内容，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
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>
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