java对xml节点属性的添加和删除

import java.io.File;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

public class domTest3 {

public static void main(String[] args) throws Exception {

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

Document doc = builder.parse(new File("src/shuiguo.xml"));

createAttribute(doc);

removeAttribute(doc);

}

public static void removeAttribute(Document doc) throws Exception {

Node apple = doc.getElementsByTagName("苹果").item(0);

apple.getAttributes().removeNamedItem("id");

TransformerFactory factory = TransformerFactory.newInstance();

Transformer former = factory.newTransformer();

former.transform(new DOMSource(doc), new StreamResult(new File(

"src/shuiguo.xml")));

}

public static void createAttribute(Document doc) throws Exception {

Node orange = doc.getElementsByTagName("桔子").item(0);

if (orange.getNodeType() == Node.ELEMENT_NODE) {

Element element = (Element) orange;

element.setAttribute("id", "333");

TransformerFactory factory = TransformerFactory.newInstance();

Transformer former = factory.newTransformer();

former.transform(new DOMSource(doc), new StreamResult(new File(

"src/shuiguo.xml")));

}

}

}