map转为xml字符串：

public static String map2str(Map<String,String> map){
		String xmlStr = null;
		StringBuffer sbf = new StringBuffer();
		sbf.append("<xml>");
		for(Entry<String,String> s: map.entrySet()){
			
			sbf.append("<")
				.append(s.getKey())
				.append(">")
				.append(s.getValue())
				.append("</")
				.append(s.getKey())
				.append(">");
				
		}
		sbf.append("</xml>");
		xmlStr = sbf.toString();
		return xmlStr;
	}

//xml形式的字符串转换为map集合
	public static Map<String,Object> xmlStr2Map(String xmlStr){
		Map<String,Object> map = new HashMap<String,Object>();
		Document doc;
		try {
			doc = DocumentHelper.parseText(xmlStr);
	        Element root = doc.getRootElement();  
	        List children = root.elements();  
	        if(children != null && children.size() > 0) {  
	            for(int i = 0; i < children.size(); i++) {  
	                Element child = (Element)children.get(i);  
	                map.put(child.getName(),child.getTextTrim());  
	            }  
	        }  
		} catch (DocumentException e) {
			e.printStackTrace();
		}
		return map;
	}