Element类的getContent()方法返回一个List对象，它包括了一个元素的所有内容：注释、属性、处理指令、文本和子元素。利用它我们可以遍历XML文档。下面的程序来自《java语言与xml教程》
import org.jdom.*;
import org.jdom.input.SAXBuilder;
import java.io.IOException;
import java.util.*;
public class TreePrinter{
public static void process(Element element){
inspect(element);
List content=element.getContent();//取元素的所有内容
Iterator iterator=content.iterator();
while(iterator.hasNext()){
Object o=iterator.next();
if(o instanceof Element){//如果是子元素
Element child=(Element)o;
process(child);//递归调用
}else if(o instanceof Comment){//如果是说明
Comment c=(Comment)o;
//System.out.println(c.getText());
// System.out.println();
}
}
public static void inspect(Element element){
if(!element.isRootElement()){
System.out.println();
}
String qualifiedName=element.getQualifiedName();
System.out.println(qualifiedName+":"+element.getText());
Namespace namespace=element.getNamespace();
if(namespace!=Namespace.NO_NAMESPACE){
String localName=element.getName();
String uri=element.getNamespaceURI();
String prefix=element.getNamespacePrefix();
System.out.println(" Local name: "+localName);
System.out.println(" Namespace URI: "+uri);
if(!"".equals(prefix)){
System.out.println(" Namespace prefix: "+prefix);
}
}
List attributes=element.getAttributes();
if(!attributes.isEmpty()){
Iterator iterator=attributes.iterator();
while(iterator.hasNext()){
Attribute attribute=(Attribute)iterator.next();
String name=attribute.getName();
String value=attribute.getValue();
Namespace attributeNamespace=attribute.getNamespace();
if(attributeNamespace==Namespace.NO_NAMESPACE){
System.out.println(" "+name+ "=\""+value+ "\"");
}else{
String prefix=attributeNamespace.getPrefix();
System.out.println(" "+prefix+":"+name+"=\""+value+"\"");
}
}
}
List namespaces=element.getAdditionalNamespaces();
if(!namespaces.isEmpty()){
Iterator iterator=namespaces.iterator();
while(iterator.hasNext()){
Namespace additional=(Namespace)iterator.next();
String uri=additional.getURI();
String prefix=additional.getPrefix();
System.out.println(" xmlns:"+prefix+"=\""+uri+"\"");
}
}
}
public static void main(String[] args){
if(args.length<=0){
System.out.println("Usage: java TreePrinter URL");
return;
}
String url=args[0];
try{
SAXBuilder parser=new SAXBuilder();
Document document=parser.build(url);
process(document.getRootElement());
}catch(JDOMException e){
System.out.println(url+" is not well-formed.");
}catch(IOException e){
System.out.println("Due to an IOException,the parser could not encode "+url);
}
}
}
运行结果：
C:\java>java TreePrinter sample.xml
HD:
xmlns:dd="http://www.zzjava.hnzz.net"
xmlns:ss="http://www.hnzz.net"
disk:
name="C"
capacity:8G
directories:200
files:1580
disk:
name="D"
capacity:10G
directories:500
files:3000
用的xml文件是：
<?xml version="1.0" encoding="UTF-8"?>
<HD xmlns:dd="http://www.zzjava.hnzz.net" xmlns:ss="http://www.hnzz.net" >
<disk name="C">
<capacity>8G</capacity>
<directories>200</directories>
<files>1580</files>
</disk>
<disk name="D">
<capacity>10G <!--good-->
</capacity>
<directories>500</directories>
<files>3000</files>
</disk>
</HD>
http://blog.iyi.cn/start/2005/01/javaxml.html
http://toney.cnblogs.com/archive/2004/11/20/66178.aspx
posted on 2006-06-20 15:18
船长 阅读(1488)
评论(1) 编辑 收藏 所属分类:
J2EE