Dom4j把xml转换成Map(非固定格式)

将xml转换成Map,能够应对不用结构的xml,而不是只针对固定格式的xml.
转换规则:
1.主要是Map与List的互相嵌套
2.同名称的节点会被装进List

示例：

import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.Iterator; 
import java.util.List; 
import java.util.Map; 
import org.dom4j.Document; 
import org.dom4j.Element; 
public class XmlUtils { 
  @SuppressWarnings("unchecked")  
    public static Map<String, Object> Dom2Map(Document doc){ 
        Map<String, Object> map = new HashMap<String, Object>(); 
        if(doc == null) 
            return map; 
        Element root = doc.getRootElement(); 
        for (Iterator iterator = root.elementIterator(); iterator.hasNext();) { 
            Element e = (Element) iterator.next(); 
            List list = e.elements(); 
            if(list.size() > 0){ 
                map.put(e.getName(), Dom2Map(e)); 
            }else 
                map.put(e.getName(), e.getText()); 
        } 
        return map; 
    } 
     @SuppressWarnings("unchecked")
    public static Map Dom2Map(Element e){ 
        Map map = new HashMap(); 
        List list = e.elements(); 
        if(list.size() > 0){ 
            for (int i = 0;i < list.size(); i++) { 
                Element iter = (Element) list.get(i); 
                List mapList = new ArrayList(); 
                 
                if(iter.elements().size() > 0){ 
                    Map m = Dom2Map(iter); 
                    if(map.get(iter.getName()) != null){ 
                        Object obj = map.get(iter.getName()); 
                        if(!obj.getClass().getName().equals("java.util.ArrayList")){ 
                            mapList = new ArrayList(); 
                            mapList.add(obj); 
                            mapList.add(m); 
                        } 
                        if(obj.getClass().getName().equals("java.util.ArrayList")){ 
                            mapList = (List) obj; 
                            mapList.add(m); 
                        } 
                        map.put(iter.getName(), mapList); 
                    }else 
                        map.put(iter.getName(), m); 
                } 
                else{ 
                    if(map.get(iter.getName()) != null){ 
                        Object obj = map.get(iter.getName()); 
                        if(!obj.getClass().getName().equals("java.util.ArrayList")){ 
                            mapList = new ArrayList(); 
                            mapList.add(obj); 
                            mapList.add(iter.getText()); 
                        } 
                        if(obj.getClass().getName().equals("java.util.ArrayList")){ 
                            mapList = (List) obj; 
                            mapList.add(iter.getText()); 
                        } 
                        map.put(iter.getName(), mapList); 
                    }else 
                        map.put(iter.getName(), iter.getText()); 
                } 
            } 
        }else 
            map.put(e.getName(), e.getText()); 
        return map; 
    } 
} 

 测试类：

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;

public class XmlToMapDemo {
 public static void main(String[] args) throws IOException,
   DocumentException {
  
  FileInputStream fis = new FileInputStream("d://a.xml");
  byte[] b = new byte[fis.available()];
  fis.read(b);
  String str = new String(b);
  
  Document doc = DocumentHelper.parseText(str);
  
  System.out.println(doc.asXML());

  long beginTime = System.currentTimeMillis();
  
  Map<String, Object> map = XmlUtils.Dom2Map(doc);

  System.out.println(map.toString());
  
  System.out.println("Use time:"+(System.currentTimeMillis()-beginTime));

 }
}