JDOM 对Xml文件（增、删、改、查）
package bean;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
/**
?* 邵波 QQ：343269876
?*/
public class XmlParse {
?
?//解析xml文件
?
?public static void XmlParse() throws JDOMException, IOException {
??SAXBuilder builder = new SAXBuilder();
??InputStream file = new FileInputStream("src/xml/po.xml");
??Document document = builder.build(file);//获得文档对象
??Element root = document.getRootElement();//获得根节点
??List<Element> list = root.getChildren();
??for(Element e:list) {
???System.out.println("ID="+e.getAttributeValue("id"));
???System.out.println("username="+e.getChildText("username"));
???System.out.println("password="+e.getChildText("password"));
??}
?}
?
?//增
?public static void addXml() throws JDOMException, FileNotFoundException, IOException {
??SAXBuilder builder = new SAXBuilder();
??Document doc = builder.build("src/xml/po.xml");//获得文档对象
??Element root = doc.getRootElement();//获得根节点
??
??//添加新元素
??Element element = new Element("person");
??element.setAttribute("id", "3");
??Element element1 = new Element("username");
??element1.setText("zhangdaihao");
??Element element2 = new Element("password");
??element2.setText("mima");
??element.addContent(element1);
??element.addContent(element2);
??root.addContent(element);
??doc.setRootElement(root);
??
??//文件处理
??XMLOutputter out = new XMLOutputter();
??out.output(doc, new FileOutputStream("src/xml/po.xml"));
?}
?
?//根据ID值删除一个节点
?public static void deletePerson(int id) throws JDOMException, IOException {
??SAXBuilder builder = new SAXBuilder();
??InputStream file = new FileInputStream("src/xml/po.xml");
??Document doc = builder.build(file);//获得文档对象
??Element root = doc.getRootElement();//获得根节点
??List<Element> list = root.getChildren();
??for(Element e:list) {
???//获取ID值
???if(Integer.parseInt(e.getAttributeValue("id"))==id) {
????root.removeContent(e);
????break;//??
???}
??}
??
??//文件处理
??XMLOutputter out = new XMLOutputter();
??out.output(doc, new FileOutputStream("src/xml/po.xml"));
?}
?
?//根据ID值修改一个节点
?public static void updatePerson(int id) throws JDOMException, IOException {
??SAXBuilder builder = new SAXBuilder();
??InputStream file = new FileInputStream("src/xml/po.xml");
??Document doc = builder.build(file);//获得文档对象
??Element root = doc.getRootElement();//获得根节点
??List<Element> list = root.getChildren();
??for(Element e:list) {
???//获取ID值
???if(Integer.parseInt(e.getAttributeValue("id"))==id) {
????System.out.println("--------------------");
????e.getChild("username").setText("111111111");
????e.getChild("password").setText("password");
????
???}
??}
??
??//文件处理
??XMLOutputter out = new XMLOutputter();
??out.output(doc, new FileOutputStream("src/xml/po.xml"));
?}
?
?static public void main(String ars[]) throws JDOMException, IOException {
??
?//?addXml();//增加XML
?//?deletePerson(3);//删除XML
?//?updatePerson(2);//修改XML
?//?XmlParse();//解析XML
?}
}
?
------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<root>
?<person id="1">
??<username>张三</username>
??<password>123123</password>
?</person>
?<person id="2">
??<username>1111111112</username>
??<password>password2</password>
?</person>
?
</root>
