java中使用Dom4j修改xml文件【转】

package org.zzn.dom4j;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.Attribute;
import java.util.List;
import java.util.Iterator;

import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
import java.io.*;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;

public class Dom4JParser{
public void modifyDocument(File inputXml){
try{
//使用 SAXReader 解析 XML 文档 catalog.xml
SAXReader saxReader = new SAXReader();
Document document = saxReader.read(inputXml);

//SAXReader 包含在 org.dom4j.io 包中。
//inputXml 是从 c:/catalog/catalog.xml 创建的 java.io.File。
//使用 XPath 表达式从 article 元素中获得 level 节点列表。
//如果 level 属性值是“Intermediate”则改为“Introductory”。
List list = document.selectNodes("//article/@level" );
Iterator iter=list.iterator();
while(iter.hasNext()){
Attribute attribute=(Attribute)iter.next();
if(attribute.getValue().equals("Intermediate"))
attribute.setValue("Introductory");
}

//获取 article 元素列表，从 article 元素中的 title 元素得到一个迭代器，并修改 title 元素的文本。
list = document.selectNodes("//article/@date" );
iter=list.iterator();
while(iter.hasNext()){
Attribute attribute=(Attribute)iter.next();
if(attribute.getValue().equals("December-2001"))
attribute.setValue("October-2002");
}
list = document.selectNodes("//article" );
iter=list.iterator();
while(iter.hasNext()){
Element element=(Element)iter.next();
Iterator iterator=element.elementIterator("title");
while(iterator.hasNext()){
Element titleElement=(Element)iterator.next();
if(titleElement.getText().equals("Java configuration with XML Schema"))
titleElement.setText("Create flexible and extensible XML schema");
}
}

//通过和 title 元素类似的过程修改 author 元素
list = document.selectNodes("//article/author" );
iter=list.iterator();
while(iter.hasNext()){
Element element=(Element)iter.next();
Iterator iterator=element.elementIterator("firstname");
while(iterator.hasNext()){
Element firstNameElement=(Element)iterator.next();
if(firstNameElement.getText().equals("Marcello"))
firstNameElement.setText("Ayesha");
}
}
list = document.selectNodes("//article/author" );
iter=list.iterator();
while(iter.hasNext()){
Element element=(Element)iter.next();
Iterator iterator=element.elementIterator("lastname");
while(iterator.hasNext()){
Element lastNameElement=(Element)iterator.next();
if(lastNameElement.getText().equals("Vitaletti"))
lastNameElement.setText("Malik");
}
}

OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding("GBK");
XMLWriter output = new XMLWriter(
new FileWriter( new File("e:/catalog-modified.xml") ),format);
output.write( document );
output.close();
}

catch(DocumentException e)
{
System.out.println(e.getMessage());
}
catch(IOException e){
System.out.println(e.getMessage());
}
}
public static void main(String[] argv){
Dom4JParser dom4jParser=new Dom4JParser();
dom4jParser.modifyDocument(new File("e:/catalog.xml"));
}
}