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));

}
}

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Dom4j把xml转换成Map(非固定格式)

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