dom对xml文件内容的增删改查

1、dom解析xml文件内容,不说了,直接上代码.package cn.xmk.xml1;import java.io.File;import java.io.FileOutputStream;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.

2、DOMSource;import javax.xml.transform.stream.StreamResult;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.NodeList;public class DomTest2 public static void main(String args) throws Exception DomTest2 dt = new DomTest2();/ dt.create(); /创建/ dt.add(); /增加内容/ dt.modify(); /修改内容

3、dt.remove(); /移除内容/删除xmlprivate void remove() try DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dbFactory.newDocumentBuilder();Document doc = builder.parse("persons.xml");NodeList nlist = doc.getElementsByTagName("person");for (

4、int i = 0; i < nlist.getLength(); i+) Element e = (Element) nlist.item(i);String str = e.getElementsByTagName("name").item(0).getTextContent();if ("赵六".equals(str.trim() e.getParentNode().removeChild(e);result(doc); catch (Exception e) e.printStackTrace();/修改xml内容private void

5、modify() try DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dbFactory.newDocumentBuilder();Document doc = builder.parse("persons.xml");NodeList nlist = doc.getElementsByTagName("person");for (int i = 0; i < nlist.getLength();

6、i+) Element e = (Element) nlist.item(i);String str = e.getElementsByTagName("name").item(0).getTextContent();if ("赵六".equals(str.trim() e.getElementsByTagName("phone").item(0).setTextContent("987654321");result(doc); catch (Exception e) e.printStackTrace();/创建

7、xmlpublic void create() try DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dbFactory.newDocumentBuilder();/ 创建xml对象Document doc = builder.newDocument();Element linkman = doc.createElement("linkman");Element person = doc.createElement("

8、;person");Element name = doc.createElement("name");Element phone = doc.createElement("phone");name.setTextContent("赵六");phone.setTextContent("87654321");person.appendChild(name);person.appendChild(phone);linkman.appendChild(person);doc.appendChild(linkman

9、);result(doc); catch (Exception e) e.printStackTrace();/增加一条内容public void add() try DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dbFactory.newDocumentBuilder();Document doc = builder.parse("persons.xml");NodeList nlist = doc.getElementsB

10、yTagName("linkman");Element e = (Element) nlist.item(0);Element person = doc.createElement("person");Element name = doc.createElement("name");Element phone = doc.createElement("phone");name.setTextContent("其他");phone.setTextContent("234324324324

11、");person.appendChild(name);person.appendChild(phone);e.appendChild(person);result(doc); catch (Exception e) e.printStackTrace();/ 进行输出public void result(Document doc) try / 开始输出TransformerFactory tFactory = TransformerFactory.newInstance();Transformer former = tFactory.newTransformer();DOMSour

12、ce domSource = new DOMSource(doc);StreamResult result = new StreamResult(new FileOutputStream(new File("persons.xml");former.transform(domSource, result); catch (Exception e) e.printStackTrace();Xml文件内容如下: <?xml version="1.0" encoding="UTF-8" standalone="no"?><linkman><person>&