一、代码如下
package com.wujianbo.five;import java.io.File;
import java.io.FileOutputStream;
import java.util.List;import javax.annotation.Generated;
import javax.swing.text.html.HTMLDocument.Iterator;import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;public class Demo11 {String fileName= System.getProperty("user.dir") + "\\data\\Students.xml";String fileName2= System.getProperty("user.dir") + "\\data\\Person.xml";public static void main(String[] args) throws Exception {// TODO Auto-generated method stubDemo11 demo11= new Demo11();//System.out.println(demo11.fileName);//System.out.println(demo11.fileName2);//demo11.readXml();//demo11.createXml();demo11.deleteXml();}//读取文档内容private void readXml() throws Exception {// TODO Auto-generated method stubSAXReader sr= new SAXReader();org.dom4j.Document doc= sr.read(new File(fileName));//System.out.println(doc);List nameList= doc.selectNodes("/class/student/name");List ageList= doc.selectNodes("/class/student/age");List sexList= doc.selectNodes("/class/student/sex");//System.out.println(nameList);for(int i=0; i<nameList.size(); i++) {String name= ((Element)nameList.get(i)).getTextTrim();System.out.print("name=" + name);String age= ((Element)ageList.get(i)).getTextTrim();System.out.print("age=" + age);String sex= ((Element)sexList.get(i)).getTextTrim();System.out.println("sex=" + sex);System.out.println("==================");}}//新建xml,并写入内容private void createXml() throws Exception {// TODO Auto-generated method stubElement root= DocumentHelper.createElement("Person");Document doc= DocumentHelper.createDocument(root);root.addAttribute("学校", "南大").addAttribute("位置", "江西");Element element1= root.addElement("学生");element1.addElement("姓名").addAttribute("婚姻", "单身").addText("小章");element1.addElement("年龄").addText("21");Element element2= root.addElement("学生");element2.addElement("姓名").addAttribute("婚姻", "单身").addText("小红").addElement("爱好").addText("唱歌");element2.addElement("年龄").addText("22");OutputFormat format= new OutputFormat(" ", true);format.setEncoding("UTF-8");XMLWriter xmlWriter= new XMLWriter(new FileOutputStream(fileName2), format);xmlWriter.write(doc);xmlWriter.close();}//修改xml文件private void modifyXml() throws Exception {// TODO Auto-generated method stubString name= "何国学";String key= "degree";String value= "研究生";SAXReader sr= new SAXReader();org.dom4j.Document doc= sr.read(new File(fileName));List namelist= doc.selectNodes("/class/students/name");java.util.Iterator iterator= namelist.iterator();while(iterator.hasNext()) {Element element= (Element)iterator.next();if(name!=null && name.equals(element.getText())) {Element pe= element.getParent();List childList= pe.elements();for(int i=0; i<childList.size(); i++) {String nodeName= ((Element)childList.get(i)).getName();if(key!=null && key.equals(nodeName) ) {((Element)childList.get(i)).setText(value);}}}}OutputFormat format= new OutputFormat(" ", true);format.setEncoding("UTF-8");XMLWriter xmlWriter= new XMLWriter(new FileOutputStream(fileName), format);xmlWriter.write(doc);xmlWriter.close();}//删除后修改指定节点private void deleteXml() throws Exception {// TODO Auto-generated method stubSAXReader sr= new SAXReader();Document doc= sr.read(new File(fileName2));System.out.println(doc);}}
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