Dom4j解析XML

import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

public class Dom4jXMLRead {
	
	/*----------------------------------------------------------------------*/
	/*----------------------------解析XML------------------------------------*/
	/*----------------------------------------------------------------------*/
	
	/**
	 * 解析xml
	 * @param url 文件地址aa
	 * @return
	 * @throws DocumentException
	 */
	public Document parse(String url) throws DocumentException{
        SAXReader reader = new SAXReader();
        Document document = reader.read(url);
        return document;
    }
	
	/**
	 * xml解析	元素处理
	 * @param document	解析后的dom对象
	 * @return
	 */
	@SuppressWarnings("unchecked")
	public void bar(Document document){
		Element root = document.getRootElement();
		
		//遍历root下的元素
        for ( Iterator i = root.elementIterator(); i.hasNext(); ) {
            Element element = (Element) i.next();
            // do something
        }

        // 遍历root下子节点是“foo”的节点元素
        for ( Iterator i = root.elementIterator( "foo" ); i.hasNext(); ) {
            Element foo = (Element) i.next();
            // do something
        }

        // 遍历根的属性
        for ( Iterator i = root.attributeIterator(); i.hasNext(); ) {
            Attribute attribute = (Attribute) i.next();
            // do something
        }
	}
	
	/*----------------------------------------------------------------------*/
	/*-----------------------写XML------------------------------------------*/
	/*----------------------------------------------------------------------*/
	/**
	 * 创建dom对象
	 */
	public Document createDocument() {
        Document document = DocumentHelper.createDocument();
        Element root = document.addElement( "root" );

        Element author1 = root.addElement( "author" )
            .addAttribute( "name", "James" )
            .addAttribute( "location", "UK" )
            .addText( "James Strachan" );
        
        Element author2 = root.addElement( "author" )
            .addAttribute( "name", "Bob" )
            .addAttribute( "location", "US" )
            .addText( "Bob McWhirter" );
        //…………………………可依次加自己的子节点
        return document;
    }
	
	/**
	 * 将dom写入硬盘
	 * @param document
	 * @throws IOException
	 */
	public void write(Document document) throws IOException {
		
        XMLWriter writer = new XMLWriter(
            new FileWriter( "output.xml" )
        );
        writer.write( document );
        writer.close();

    }
	
	/**
	 * 测试下
	 * @param args
	 */
	public static void main(String[] args) {
		Dom4jXMLRead readWrite = new Dom4jXMLRead();
		Document document = readWrite.createDocument();
		try {
			readWrite.write( document );
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}