DOM解析XML

package com.netunit.workbench.util;

import java.io.File;

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

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * 保存时隙通道配置
 * @author 何明
 *
 */
public class HandleSlotConfig {

	private static final String path = "D:\\slotconfig.xml";
	
	private static Element root = null;

	private static Element theHandle = null;
	
	private static Element theProperties = null;
	
	public HandleSlotConfig(){
		
		
		
	}
	
	/**
	 * 将配置信息保存到本地
	 * @param timeSlot 时隙
	 * @param passage  通道
	 * @param address1 卡地址
	 * @param address2 槽道地址
	 * @param port1	   源端
	 * @param port2	   宿端
	 * @return
	 */
	public static int toWrite(String timeSlot,String passage,String address1,String address2,String port1,String port2){
		
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		
		try{
			
			DocumentBuilder db = factory.newDocumentBuilder();
			
			File file = new File(path);
			
			Document doc = db.parse(file);
			
			root = doc.getDocumentElement();
			
			theHandle = doc.createElement("info");
			
			theProperties = doc.createElement("timeslot");
			
			theProperties.setAttribute("id", timeSlot);
			
			theProperties.setTextContent(passage);
			
			theHandle.appendChild(theProperties);
			
			theProperties = doc.createElement("address");
			
			theProperties.setAttribute("id", address1);
			
			theProperties.setTextContent(address2);
			
			theHandle.appendChild(theProperties);
			
			theProperties = doc.createElement("port");
			
			theProperties.setAttribute("id", port1);
			
			theProperties.setTextContent(port2);
			
			theHandle.appendChild(theProperties);
			
			root.appendChild(theHandle);
			
			HandleLogXML.saveXml(path, doc);
			
		}catch(Exception e){
			
			e.printStackTrace();
			
		}
		
		return 0;
		
	}
	
	/**
	 * 获得节点值
	 * @param key
	 * @return
	 */
	public static String[] getMessage(String key){
		
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		
		try{
			
			DocumentBuilder db = factory.newDocumentBuilder();
			
			File file = new File(path);
			
			Document doc = db.parse(file);
			
			String [] str = new String[doc.getDocumentElement().getElementsByTagName(key).getLength()];
			
			NodeList le =doc.getDocumentElement().getElementsByTagName(key);
			
			for(int i = 0; i < le.getLength(); ++i){
				
				Node no = le.item(i);
				
				str[i] = no.getTextContent();
				
			}
			
			return str;
			
		}catch(Exception e){
			
			e.printStackTrace();
			
		}
		
		return null;
		
	}
	
	/**
	 * 获得节点属性值
	 * @param key
	 * @return
	 */
	public static String[] getAtributeValue(String key){
		
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		
		try{
			
			DocumentBuilder db = factory.newDocumentBuilder();
			
			File file = new File(path);
			
			Document doc = db.parse(file);
			
			String[] str = new String[doc.getDocumentElement().getElementsByTagName(key).getLength()];
			
			NodeList le = doc.getDocumentElement().getElementsByTagName(key);
			
			for(int i = 0; i < le.getLength(); ++i){
				
				Element no = (Element)le.item(i);
				
				str[i] = no.getAttribute("id");
				
			}
			
			return str;
			
		}catch(Exception e){
			
			e.printStackTrace();
			
		}
		
		return null;
		
	}
	
	public static void main(String []args){
		
		HandleSlotConfig.toWrite("5", "8","3","5","3","2");
		
		String[] str = new String[HandleSlotConfig.getMessage("port").length];
		
		str = HandleSlotConfig.getMessage("port");
		
		for(int i = 0; i < str.length; ++i){
			
			System.out.println(str[i]);
			
		}
		
		String[] s = new String[HandleSlotConfig.getAtributeValue("address").length];
		
		s = HandleSlotConfig.getAtributeValue("address");
		
		for(int i = 0; i < s.length; ++i){
			
			System.out.println(s[i]);
			
		}
		

	}
	
	
}