往xml中更新节点的实例代码


            往xml中更新节点的实例代码





/* System.out.println("2323");

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder docbuilder = factory.newDocumentBuilder();

Document parse = docbuilder

.parse(new File("src/ProdQuery.xml"));

// Element createElement2 = parse.createElement("");

Element createElement = parse.createElement("products");

Node item2 = parse.getChildNodes().item(parse.getChildNodes().getLength()-1);

for (String item : map.keySet()) {

//循环添加至products

System.out.println("tianjia1");

Element clidren = parse.createElement("product");

Attr createAttribute = parse.createAttribute("name");

createAttribute.setNodeValue(item);

Attr createAttribute2 = parse.createAttribute("value");

createAttribute2.setNodeValue(map.get(item));

clidren.setAttributeNode(createAttribute);

clidren.setAttributeNode(createAttribute2);

createElement.appendChild(clidren);

}

//将products添加到根目录

item2.appendChild(createElement);

//创建一个TransformerFactory对象

TransformerFactory tFactory = TransformerFactory.newInstance();

//得到一个操作对象

Transformer transformer = tFactory.newTransformer();

//设置们，这个是编码

transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");

//

DOMSource source = new DOMSource(parse);

System.out.println("改变文件");

StreamResult result = new StreamResult(new File("src/ProdQuery.xml"));

//让xml文件换行

transformer.setOutputProperty(OutputKeys.INDENT, "yes");

transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

transformer.transform(source, result);*/



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