java之Dom实例（W3cDom）

package anby.com;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


public class ReadXml {
	public static void main(String args[]) throws ParserConfigurationException, SAXException, IOException
	{
		Book book=new Book();
		List Books=new ArrayList();
		//获取工厂实例
       DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
      factory.setIgnoringElementContentWhitespace(true);
       //通过工厂获取DocumentBuilder实例
       DocumentBuilder dbuilder=factory.newDocumentBuilder();
       //获取Dom
       Document document= dbuilder.parse("Book.xml");
       
       //获取下面的子节点
       NodeList bookElement =document.getElementsByTagName("book");
       //遍历NodeList取值
       for(int i=0;i<bookElement.getLength();i++)
       {
    	   Node node=bookElement.item(i);//获取节点下的元素
    	   Element bookEle=(Element)node;//将节点对象转换为元素
    	    book.setId( bookEle.getAttribute("id")) ;//获取属性
    	   NodeList childList= node.getChildNodes();
    	   for(int j=0;j<childList.getLength();j++)
    	   {
//    		   if(childList.item(j).getNodeName()==“title")
    		 //这样可以避免空指针异常
    		  if( "titile".equals(childList.item(j).getNodeName()))//Node.getNodeName()获取节点名称
    		  {
    			  book.setTitile(childList.item(j).getTextContent());//Node..getTextContent()获取节点内容
    		  }
    		  if("price".equals(childList.item(j).getNodeName()))
    		  {
    			  book.setPrice(childList.item(j).getTextContent());
    		  }
    	   }
    	   System.out.println(book);
       }
       
       
    
	}

}

class Book
{
    String id;
    String titile;
	String price;
    public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getTitile() {
		return titile;
	}
	public void setTitile(String titile) {
		this.titile = titile;
	}
	public String getPrice() {
		return price;
	}
	public void setPrice(String price) {
		this.price = price;
	}
	@Override
	public String toString() {
		return "Book [id=" + id + ", titile=" + titile + ", price=" + price
				+ "]";
	}

}