jdom解析xml详解编程语言

import java.io.File; 
import java.io.FileOutputStream; 
import java.util.List; 
import org.jdom.Attribute; 
import org.jdom.Document; 
import org.jdom.Element; 
import org.jdom.input.SAXBuilder; 
import org.jdom.output.Format; 
import org.jdom.output.XMLOutputter; 
public class JDomTest2 
{ 
 public static void main(String[] args) throws Exception 
 { 
  //JDOM从XML中解析 
  SAXBuilder builder = new SAXBuilder(); 
  //获得XML文档对象 
  Document doc = builder.build(new File("jdom.xml")); 
  //得到文档根元素 
  Element element = doc.getRootElement(); 
   
  System.out.println(element.getName()); 
  //得到根元素下的hello元素 
  Element hello = element.getChild("hello"); 
   
  System.out.println(hello.getText()); 
  //得到hello子元素下的属性 
  List list = hello.getAttributes(); 
   
  //得到hello元素下属性的名字和值 
  for(int i = 0 ;i < list.size(); i++) 
  { 
   Attribute attr = (Attribute)list.get(i); 
    
   String attrName = attr.getName(); 
   String attrValue = attr.getValue(); 
    
   System.out.println(attrName + "=" + attrValue); 
  } 
  //删除hello下的world子元素 
  hello.removeChild("world"); 
   
  //将文档保存到另一个文件 
  XMLOutputter out = new XMLOutputter(Format.getPrettyFormat().setIndent("    ")); 
   
  out.output(doc, new FileOutputStream("jdom2.xml"));   
   
 } 
}