Map转换成xml

package net.chnbs.delta.rde.util;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.log4j.Logger;

/** 
 * @author neil 
 * @version 创建时间：2012-5-29 下午3:49:59 
 * 类说明 :
 */
public class MapToXmlString {

private static final Logger log = Logger.getLogger(MapToXmlString.class);
public static  String   toXML(Map  _obj,Object key){ 
    StringBuffer   xml   =   new   StringBuffer();
//     xml.append( "<?xml  version=\"1.0\" ");
//     xml.append( "   encoding=\" "); 
//     xml.append( "utf-8 "); 
//     xml.append( "\" "); 
//     xml.append( "   ?> \n "); 
    xml.append( "<").append(key).append(">\n"); 
    xml.append(toXML(_obj)); 
    xml.append( "</").append(key).append(">");