XmlHelpUtil.java

package tangjie.qipai.majiang.logic.weixin;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import org.dom4j.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

public class XmlHelpUtil {
	
	public String setXML(String return_code, String return_msg) {
		return "<xml><return_code><![CDATA[" + return_code + "]]></return_code><return_msg><![CDATA[" + return_msg
				+ "]]></return_msg></xml>";
	}

	public SortedMap<Object, Object> xmlConvertToMap(String rxml) {
		// 解析xml成map
		Map<String, String> m = new HashMap<String, String>();
		try {
			m = XmlHelpUtil.doXMLParse(rxml);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		// 过滤空 设置 SortedMap
		SortedMap<Object, Object> packageParams = new TreeMap<Object, Object>();
		Iterator it = m.keySet().iterator();
		while (it.hasNext()) {
			String parameter = (String) it.next();
			String parameterValue = m.get(parameter);

			String v = "";
			if (null != parameterValue) {
				v = parameterValue.trim();
			}
			packageParams.put(parameter, v);
		}
		return packageParams;
	}

	/**
	 * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
	 * 
	 * @param strxml
	 * @return
	 * @throws JDOMException
	 * @throws IOException
	 */
	public static Map doXMLParse(String strxml) throws JDOMException, IOException {
		strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");
		if (null == strxml || "".equals(strxml)) {
			return null;
		}
		Map m = new HashMap();
		InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
		SAXBuilder builder = new SAXBuilder();
		Document doc = (Document) builder.build(in);
		Element root = (Element) doc.getRootElement();
		List list = root.getChildren();
		Iterator it = list.iterator();
		while (it.hasNext()) {
			Element e = (Element) it.next();
			String k = e.getName();
			String v = "";
			List children = e.getChildren();
			if (children.isEmpty()) {
				v = e.getTextNormalize();
			} else {
				v = XmlHelpUtil.getChildrenText(children);
			}
			m.put(k, v);
		}
		// 关闭流
		in.close();
		return m;
	}

	/**
	 * 获取子结点的xml
	 * @param children
	 * @return String
	 */
	public static String getChildrenText(List children) {
		StringBuffer sb = new StringBuffer();
		if (!children.isEmpty()) {
			Iterator it = children.iterator();
			while (it.hasNext()) {
				Element e = (Element) it.next();
				String name = e.getName();
				String value = e.getTextNormalize();
				List list = e.getChildren();
				sb.append("<" + name + ">");
				if (!list.isEmpty()) {
					sb.append(XmlHelpUtil.getChildrenText(list));
				}
				sb.append(value);
				sb.append("</" + name + ">");
			}
		}
		return sb.toString();
	}
}