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]);

		}


	}


}