微信支付--工具类--处理XML数据

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.Set;
import java.util.SortedMap;
import java.util.TreeMap;

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

/**
*
* @author Administrator
*
*/
public class XMLUtil {

/**
*
* 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 SortedMap<String, String> parseMap(String strxml)
throws JDOMException, IOException {
if (null == strxml || "".equals(strxml)) {
return null;
}
strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");
SortedMap<String, String> m = new TreeMap<String, String>();
InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(in);
Element root = 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 = XMLUtil.getChildrenText(children);
}

m.put(k, v);
}
// 关闭流

in.close();
return m;
}

/**
*
* 获取子结点的xml
*
* @param children
*
* @return String
*/

private 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(XMLUtil.getChildrenText(list));
}
sb.append(value);
sb.append("</" + name + ">");
}
}
return sb.toString();
}

/**
* 输出XML
*
* @param parameters
* @return
*/
public static String parseXML(SortedMap parameters) {
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Set es = parameters.entrySet();
Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String k = (String) entry.getKey();
String v = (String) entry.getValue();
if (null != v && !"".equals(v) && !"appkey".equals(k)) {
sb.append("<" + k + ">" + v + "</" + k + ">\n");
}
}
sb.append("</xml>");
return sb.toString();
}
}