使用dom4j解析XML例子

包括三个文件：studentInfo.xml(待解析的xml文件), Dom4jReadExmple.java(解析的主要类), TestDom4jReadExmple.java(测试解析的结果)

代码运行前需先导入dom4j架包。

 

studentInfo.xml文件（该文件放在本项目目录下）内容如下：

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<?xml version="1.0" encoding="gb2312"?> <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类代码如下：

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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 henuyuxiang  * @since 2014.7.11  */ 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 (@SuppressWarnings("rawtypes")             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 (@SuppressWarnings("rawtypes")                 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类代码如下：

 

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package demo1;   import java.util.HashMap;   /**  * 测试Dom4jReadExmple解析的情况  *  * @author henuyuxiang  * @since 2014.7.11  */ 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();         }     } }

 

 

运行结果如下图所示：