Java之Dom4j（RCUDS）

package anby.com;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.dom4j.io.SAXWriter;
import org.dom4j.io.XMLWriter;
import org.xml.sax.SAXException;

public class Dom4jCUD {

	/**
	 * @param args
	 */
	public static void main(String[] args)throws Exception {
		
		Document doc= readXml("Book.xml");
		//使用 Xpath进行查询
		Node node= doc.selectSingleNode("//book[@id='boo1']");
		Element ele=(Element)node;
		//获取元素内容
		Element  titileEle=ele.element("titile");
		System.out.println(ele.elementText("titile"));
		
		//修改元素内容
		titileEle.setText("孔乙己");
		System.out.println(ele.elementText("titile"));
		
		//删除元素
		Node bookNode=doc.selectSingleNode("//book[@id='boo2']");
		Element Parent=bookNode.getParent();//获取父节点
	   Parent.remove(bookNode);
	   
		//创建元素
		 Element root=doc.getRootElement();
		 Element newbook=DocumentHelper.createElement("book");
		 Attribute subTiltle= DocumentHelper.createAttribute(newbook, "id", "boo3");
		 newbook.addAttribute("id", "boo3");//增加属性
		 //创建子元素
		 Element subTiltle1= DocumentHelper.createElement("titile");
		subTiltle1.setText("孔乙己");
		 newbook.add(subTiltle1);    //父元素增加子元素

		 Element subPrice= DocumentHelper.createElement("price");
		 subPrice.setText("30");
		newbook.add(subPrice);    //父元素增加子元素
			 

		root.add(newbook);//父节点增加book、节点
		
		//格式不规范，需要格式化xml，还有出现中文乱码现象
		 saveXml(doc);
	}
	
	public static Document readXml(String path) throws DocumentException
	{
      SAXReader saxreader =new SAXReader();
      return saxreader.read(new File(path));
	}
	
  public static void saveXml(Document document) throws SAXException, IOException
  {
	  XMLWriter writer=new XMLWriter(new FileWriter("Books.xml"));
	  writer.write(document);
	  writer.close();
  }
	
}