jdom 的xml / map 互转

package com.mymhotel.opera;import java.io.IOException;import java.io.StringReader;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import org.jdom.Attribute;import org.jdom.Document;import org.jdom.Element;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;public class XmlUtil { /**  * 取得xml文件的根节点名称，即消息名称。  *   * @param xmlStr  *            xml内容  * @return String 返回名称  */ public static String getRootName(String xmlStr) throws Exception {  SAXBuilder builder = new SAXBuilder();  Document doc = builder.build(new StringReader(xmlStr));  Element root = doc.getRootElement();  return root.getName(); } /**  * 把xml文件转换为map形式，其中key为有值的节点名称，并以其所有的祖先节点为前缀，用  * "."相连接。如：SubscribeServiceReq.Send_Address.Address_Info.DeviceType  *   * @param xmlStr  *            xml内容  * @return Map 转换为map返回  */ public static Map<String, String> xml2Map(String xmlStr)   throws JDOMException, IOException {  Map<String, String> rtnMap = new HashMap<String, String>();  SAXBuilder builder = new SAXBuilder();  Document doc = builder.build(new StringReader(xmlStr));  // 得到根节点  Element root = doc.getRootElement();  String rootName = root.getName();  rtnMap.put("root.name", rootName);  // 调用递归函数，得到所有最底层元素的名称和值，加入map中  convert(root, rtnMap, rootName);  return rtnMap; } /**  * 递归函数，找出最下层的节点并加入到map中，由xml2Map方法调用。  *   * @param e  *            xml节点，包括根节点  * @param map  *            目标map  * @param lastname  *            从根节点到上一级节点名称连接的字串  */ public static void convert(Element e, Map<String, String> map,   String lastname) {  if (e.getAttributes().size() > 0) {   Iterator it_attr = e.getAttributes().iterator();   while (it_attr.hasNext()) {    Attribute attribute = (Attribute) it_attr.next();    String attrname = attribute.getName();    String attrvalue = e.getAttributeValue(attrname);    //map.put( attrname, attrvalue);    map.put(lastname + "." + attrname, attrvalue); //key 根据根节点 进行生成   }  }  List children = e.getChildren();  Iterator it = children.iterator();  while (it.hasNext()) {   Element child = (Element) it.next();   /*String name = lastname + "." + child.getName();*/   String name = child.getName();   // 如果有子节点，则递归调用   if (child.getChildren().size() > 0) {    convert(child, map,  lastname + "." + child.getName());   } else {    // 如果没有子节点，则把值加入map    map.put(name, child.getText());    // 如果该节点有属性，则把所有的属性值也加入map    if (child.getAttributes().size() > 0) {     Iterator attr = child.getAttributes().iterator();     while (attr.hasNext()) {      Attribute attribute = (Attribute) attr.next();      String attrname = attribute.getName();      String attrvalue = child.getAttributeValue(attrname);      map.put(lastname + "." + child.getName() + "." + attrname, attrvalue);      //map.put( attrname, attrvalue);     }    }   }  } } /**  * 把xml文件转换为list形式，其中每个元素是一个map，map中的key为有值的节点名称，并以其所有的祖先节点为前缀，用  * "."相连接。如：SubscribeServiceReq.Send_Address.Address_Info.DeviceType  *   * @param xmlStr  *            xml内容  * @return Map 转换为map返回  */ public static List<Map<String, String>> xml2List(String xmlStr)   throws JDOMException, IOException {  List<Map<String, String>> rtnList = new ArrayList<Map<String, String>>();  Map<String, String> rtnMap = new HashMap<String, String>();  SAXBuilder builder = new SAXBuilder();  Document doc = builder.build(new StringReader(xmlStr));  // 得到根节点  Element root = doc.getRootElement();  String rootName = root.getName();  rtnMap.put("root.name", rootName);  // 调用递归函数，得到所有最底层元素的名称和值，加入map中  convert2List(root, rtnMap, rootName, rtnList);  if (rtnList.size() == 0)   rtnList.add(rtnMap);  return rtnList; } /**  * 递归函数，找出最下层的节点并加入到map中，如果有相同的节点，则加入list中， 由xml2List方法调用。  *   * @param e  *            xml节点，包括根节点  * @param map  *            目标map  * @param lastname  *            从根节点到上一级节点名称连接的字串  * @param list  *            相同节点生成map放入list中  */ public static void convert2List(Element e, Map<String, String> map,   String lastname, List<Map<String, String>> list) {  if (e.getAttributes().size() > 0) {   Iterator it_attr = e.getAttributes().iterator();   while (it_attr.hasNext()) {    Attribute attribute = (Attribute) it_attr.next();    String attrname = attribute.getName();    String attrvalue = e.getAttributeValue(attrname);    map.put(attrname, attrvalue);   }  }  List children = e.getChildren();  Iterator it = children.iterator();  while (it.hasNext()) {   Element child = (Element) it.next();   String name = lastname + "." + child.getName();   // 如果有子节点，则递归调用   if (child.getChildren().size() > 0) {    convert(child, map, name);   } else {    // 如果没有子节点，则把值加入map    map.put(name, child.getText());    // 如果该节点有属性，则把所有的属性值也加入map    if (child.getAttributes().size() > 0) {     Iterator attr = child.getAttributes().iterator();     while (attr.hasNext()) {      Attribute attribute = (Attribute) attr.next();      String attrname = attribute.getName();      String attrvalue = child.getAttributeValue(attrname);      map.put(name + "." + attrname, attrvalue);     }    }   }   // 如果有相同节点，则加入list中，不考虑子节点中又有相同节点的情况   if (e.getChildren(child.getName()).size() > 1) {    Map<String, String> aMap = new HashMap<String, String>();    aMap.putAll(map);    list.add(aMap);    map = new HashMap<String, String>();    map.put("root.name", aMap.get("root.name"));   }  } } /**  * 打印map 的所有key和value  *   * @param map  */ public static void printMap(Map<String, String> map) {  Iterator<String> keys = map.keySet().iterator();  while (keys.hasNext()) {   String key = keys.next();   System.out.println(key + ":" + map.get(key));  } } /**  * 格式化xml  *   * @param xmlStr  * @param encode  * @return String  * @date Apr 30, 2008  *//* @SuppressWarnings("deprecation") public static String formatXml(String xmlStr, String encode) {  SAXBuilder sb = new SAXBuilder();  Reader reader = new StringReader(xmlStr);  Document doc = null;  try {   doc = sb.build(reader);  } catch (Exception e) {   // do nosth  }  XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat());  outputter.setEncoding(encode);  String result = "";  if (null != doc) {   result = outputter.outputString(doc);  }  return result; }*/}