java中使用dom4j读xml文件简单教程

需要dom4j.jar文件 ，自行下载。
test.xml
  1: <?xml version="1.0" encoding="gbk"?>

  2: 

  3: <students>

  4:   <person sex="男" age="21">

  5:     <id>1</id>

  6:     <name>章治鹏</name>

  7:     <homepage>http://blog.csdn.net/tonyzzp</homepage>

  8:   </person>

  9:   <person age="20">

 10:     <id>2</id>

 11:     <name>徐雄皓</name>

 12:     <homepage boolean="false">http://www.xxh.com</homepage>

 13:   </person>

 14: </students>

 
 
XMLStudentsParam.java
  1: package org.zzp.common.xml.dom4j;

  2: 

  3: public enum XMLStudentsParam {

  4: 	id,name,homepage,sex,age

  5: }

 
 
Dom4jReadDemo.java
  1: package org.zzp.common.xml.dom4j;

  2: 

  3: import java.util.Iterator;

  4: import java.util.List;

 

 1: package org.zzp.common.xml.dom4j;

  2: 

  3: import java.util.Iterator;

  4: import java.util.List;

  5: 

  6: import org.dom4j.Attribute;

  7: import org.dom4j.Document;

  8: import org.dom4j.DocumentException;

  9: import org.dom4j.Element;

 10: import org.dom4j.io.SAXReader;

 11: 

 12: public class Dom4jReadDemo {

 13:  public static void main(String[] args) {

 14:   try {

 15:    Document doc=new SAXReader().read("test.xml");

 16:    Element root=doc.getRootElement();

 17:    System.out.println("根节点名："+root.getName());

 18:    List<Element> students=root.elements();

 19:    System.out.println("共有学生数"+students.size()+"\n");

 20:    //遍历每个学生

 21:    for(Iterator<Element> it= students.iterator();it.hasNext();){

 22:     Element student=(Element)it.next();

 23:     List<Element> student_s=student.elements();

 24:     //遍历每个学生的子标签

 25:     for(Iterator<Element> its=student_s.iterator();its.hasNext();){

 26:      Element param=(Element)its.next();

 27:      switch(XMLStudentsParam.valueOf(param.getName())){

 28:      case name:

 29:       System.out.print("姓名：");

 30:       break;

 31:      case id:

 32:       System.out.print("编号：");

 33:       break;

 34:      case homepage:

 35:       System.out.print("主页：");

 36:       if (param.attribute("boolean")!=null && !param.attribute("boolean").getText().equals("true")) {

 37:        System.out.print("(网页未经验证)");

 38:       }

 39:       break;

 40:      }

 41:      System.out.println(param.getText());

 42:     }

 43:     //遍历每个学生的属性

 44:     for(Iterator<Attribute> ita=student.attributeIterator();ita.hasNext();){

 45:      Attribute a=(Attribute)ita.next();

 46:      switch(XMLStudentsParam.valueOf(a.getName())){

 47:      case sex:

 48:       System.out.print("性别：");

 49:       break;

 50:      case age:

 51:       System.out.print("年龄：");

 52:       break;

 53:      }

 54:      System.out.println(a.getText());

 55:     }

 56:     System.out.println();

 57:    }

 58:   } catch (DocumentException e) {

 59:    // TODO Auto-generated catch block

 60:    e.printStackTrace();

 61:   }

 62:  }

 63: }