books.java

j2ee 小例子内容包含 javabean、xml 在java中的应用、 集合框架、输入输出流、网络编程。 所用编辑工具是： JCreator Pro 适用于j2ee 初级入门

package domexample;

import javax.xml.parsers.*;
import java.io.*;
import java.net.URL;
import org.w3c.dom.*;

public class Books{
	public Books(String filename){
		Document doc = null;
		try{
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			dbf.setNamespaceAware(true);
			DocumentBuilder db = dbf.newDocumentBuilder();
			doc = db.parse(new File(filename));
			
			String nm = "http://www.books.com/books";
			String ob = "http://www.ebooks.com/software";
			//
			System.out.println(nm + "名字空间中的元素");
			NodeList n1 = doc.getElementsByTagNameNS(nm,"*");
			for(int i=0;i<n1.getLength();i++){
				Node n = n1.item(i);
				System.out.println(n.getNodeName()); 
			}
			//
			System.out.println("\n名字空间"+ob+"中的属性...");
			n1 = doc.getElementsByTagName("*");
			for(int i=0;i<n1.getLength();i++){
				if(n1.item(i) instanceof Element){
					Text t = (Text)n1.item(i).getFirstChild();
					Element e = (Element)n1.item(i); 
					Attr a = e.getAttributeNodeNS(ob,"class");
					if(a!=null){
						String val = a.getNodeValue();
						System.out.println("<"+val+">"+t.getNodeValue()+"</"+val+">");
					}
				}
			}
			
		}catch(Exception e){
			System.out.println("异常："+e.getMessage());
			e.printStackTrace();
		}
	}
	public static void main(String[] args){
		Books nsd = null;
		if(args.length>=1){
			nsd = new Books(args[0]);
		}else{
			System.out.println("命令行参数：books.xml"); 
		}
	}
}