XML工具类XmlUtil

import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;

public class XmlUtil {
	private static final Logger logger = Logger.getLogger(XmlUtil.class);
	
	/**
	 * 获得根据节点信息
	 * @param xml				xml字符串
	 * @return
	 */
	public static Element getRootElement(String xml){
		Document doc = null;
		Element root = null;
		
		try {
			doc = DocumentHelper.parseText(xml); 
			root = doc.getRootElement();
			
		} catch (Exception ex) {
			// TODO: handle exception
			logger.error("解释xml文件出现异常:" + ex.getMessage());
		}
		return root;
	} 
	
	/**
	 * 获得指定元素下所有节点属性及值
	 * @param element
	 * @return
	 */
	public static Map getNodeValues(Element element){
		Element root = null;
		Map map = new HashMap();
		try {
			List list = element.elements();
			Element e = null;
			for (int i = 0; i < list.size(); i++) {
				e = (Element)list.get(i);
				map.put(e.getName(), e.getText());
			}			
		} catch (Exception ex) {
			// TODO: handle exception
			logger.error("获得指定元素下所有节点属性及值出现异常： " + ex.getMessage());
		}
		return map;
	} 
	
	/**
	 * 获得指定节点指定属性值
	 * @param element					元素名称
	 * @param attributeName				属性名称
	 * @return
	 */
	public static String getElementAttributeValue(Element element,String attributeName){
		String value = "";
		try {
			value = element.attributeValue("attributeName");
		} catch (Exception ex) {
			// TODO: handle exception
			logger.error("获得指定节点指定属性值出现异常： " + ex.getMessage());
		}
		return value;
	}
	
	
	public static void main(String[] args) {
		try {
			String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><Response><Result>0</Result><Mo num=\"2\"><Item id=\"1\" content=\"上行01\" from_mobile=\"13500000000\" to_port=\"0001\" rec_time=\"2013-07-20 13:23:45\"/><Item id=\"2\" content=\"上行02\" from_mobile=\"13600000000\" to_port=\"0002\" rec_time=\"2013-07-20 13:23:45\"/></Mo></Response >";
			Map map = XmlUtil.getNodeValues(XmlUtil.getRootElement(xml));
			String result = (String)map.get("Result");
			System.out.println("result = " + result );
			
			Element mo = XmlUtil.getRootElement(xml).element("Mo");
			System.out.println("mo = " + mo);
			int num = Integer.parseInt(mo.attributeValue("num"));
			System.out.println("size = " + num);
			Element item = null;
			List list = mo.elements();
			
			for (int i = 0; i < list.size(); i++) {
				item = (Element)list.get(i);
				System.out.println("id = " + item.attributeValue("id") + " content = " + item.attributeValue("content") + " from_mobile = " + item.attributeValue("from_mobile") + " to_port = " + item.attributeValue("to_port") + " rec_time = " + item.attributeValue("rec_time"));
			}
			
		} catch (Exception e) {
			// TODO: handle exception
			System.out.println("ERROR:" + e.getMessage());
		}

	}

}