施用dom4j解析XML例子

使用dom4j解析XML例子
<students>
??? <student age="25"><!--如果没有age属性，默认的为20-->
??????? <name>崔卫兵</name>
??????? <college>PC学院</college>
??????? <telephone>62354666</telephone>
??????? <notes>男,1982年生,硕士，现就读于北京邮电大学</notes>
??? </student>
??? <student>
??????? <name>cwb</name>
??????? <college leader="学院领导">PC学院</college><!--如果没有leader属性，默认的为leader-->
??????? <telephone>62358888</telephone>
??????? <notes>男,1987年生,硕士，现就读于中国农业大学</notes>
??? </student>
??? <student age="45">
??????? <name>xxxxx</name>
??????? <college leader="">xxx学院</college>
??????? <telephone>66666666</telephone>
??????? <notes>注视中，注释中</notes>
??? </student>
??? <student age="">
??????? <name>lxx</name>
??????? <college>yyyy学院</college>
??????? <telephone>88888888</telephone>
??????? <notes>注视中111，注释中222</notes>
??? </student>
</students>

Dom4jReadExmple.java

package dom4jExample.read;

import java.io.File;
import java.util.HashMap;
import java.util.Iterator;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
/**
?* 利用dom4j进行XML编程
?* @author cuiweibing
?* @since 2007.8.10
?*/
public class Dom4jReadExmple {
?/**
? * 遍历整个XML文件，获取所有节点的值与其属性的值，并放入HashMap中
? * @param filename String 待遍历的XML文件（相对路径或者绝对路径）
? * @param hm?????? HashMap 存放遍历结果，格式：<nodename,nodevalue>或者<nodename+attrname,attrvalue>
? */
?public void iterateWholeXML(String filename,HashMap<String,String> hm){
??SAXReader saxReader = new SAXReader();
??try {
???Document document = saxReader.read(new File(filename));
???Element root = document.getRootElement();
//???用于记录学生编号的变量
???int num=-1;
???//遍历根结点（students）的所有孩子节点（肯定是student节点）
???????? for ( Iterator iter = root.elementIterator(); iter.hasNext(); ) {
???????????? Element element = (Element) iter.next();
???????????? num++;
????// 获取person节点的age属性的值
???????????? Attribute ageAttr=element.attribute("age");
????if(ageAttr!=null){
?????String age = ageAttr.getValue();
?????if (age != null&&!age.equals("")) {
??????hm.put(element.getName() + "-"+ageAttr.getName()+ num, age);
?????} else {
??????hm.put(element.getName() + "-" +ageAttr.getName()+ num, "20");
?????}
????}else{
?????hm.put(element.getName() + "-age"+ num, "20");
????}
???????????? //遍历student结点的所有孩子节点（即name，college，telphone，notes），并进行处理
???????????? for ( Iterator iterInner = element.elementIterator(); iterInner.hasNext(); ) {
????????????? Element elementInner = (Element) iterInner.next();
????????????? if(elementInner.getName().equals("college")){
????????????? ?hm.put(elementInner.getName()+ num, elementInner.getText());
????????????? ?//获取college节点的leader属性的值
????????????? ?Attribute leaderAttr=elementInner.attribute("leader");
????????????? ?if(leaderAttr!=null){
???????String leader = leaderAttr.getValue();
???????if (leader != null&&!leader.equals("")) {
????????hm.put(elementInner.getName() + "-"+leaderAttr.getName()+ num, leader);
???????} else {
????????hm.put(elementInner.getName() + "-" +leaderAttr.getName()+ num, "leader");
???????}
????????????? ?}else {
???????hm.put(elementInner.getName() + "-leader"+ num, "leader");
??????}
????????????? }else{
????????????? ?hm.put(elementInner.getName()+ num, elementInner.getText());
????????????? }
???????????? }
???????? }

??} catch (DocumentException e) {
???// TODO Auto-generated catch block
???e.printStackTrace();
??}
?}
}

TestDom4jReadExmple.java

package dom4jExample.read;

import java.util.HashMap;

/**
?* 测试Dom4jReadExmple解析的情况
?* @author cuiweibing
?* @since 2007.8.10
?*/
public class TestDom4jReadExmple {
?public static void main(String[] args) {
???? try{
?????? //获取解析完后的解析信息
?????? HashMap<String,String> hashMap;
?????? Dom4jReadExmple drb=new Dom4jReadExmple();
?????? //遍历整个XML文件
?????? hashMap = new HashMap<String,String>();
?????? drb.iterateWholeXML("studentInfo.xml", hashMap);
?????? System.out.println("姓名/t年龄/t学院/t学院领导/t电话/t/t备注");
?????? for(int i=0;i<hashMap.size();i+=6){
???????? int j=i/6;
???????? System.out.print(hashMap.get("name"+j)+"/t");
???????? System.out.print(hashMap.get("student-age"+j)+"/t");
???????? System.out.print(hashMap.get("college"+j)+"/t");
???????? System.out.print(hashMap.get("college-leader"+j)+"/t");
???????? System.out.print(hashMap.get("telephone"+j)+"/t");
???????? System.out.println(hashMap.get("notes"+j)+"/t");
?????? }
???? }catch(Exception ex){
?????? ex.printStackTrace();
???? }
?? }
}

运行结果

姓名?年龄?学院?学院领导?电话??备注
崔卫兵?25?PC学院?leader?62354666?男,1982年生,硕士，现就读于北京邮电大学?
cwb?20?PC学院?学院领导?62358888?男,1987年生,硕士，现就读于中国农业大学?
xxxxx?45?xxx学院?leader?66666666?注视中，注释中?
lxx?20?yyyy学院?leader?88888888?注视中111，注释中222??