Java解析JSON数据

	JSONObject json = null;
	String jsonStr = request.getParameter("前台传送json字符串的参数名"); 
		try {
                     // 将json字符串转成json对象
                     json = JSONObject.fromObject(jsonStr);
		} catch (Exception e) {
		     throw new HuatengException("string转化json对象异常",e);
		}
        Iterator iter = json.keySet().iterator();
        Map<String,String> map = new HashMap<String,String>();
        while (iter.hasNext()) {
        	String key = (String) iter.next();
        	String value = json.getString(key);
        	map.put(key, value);
        }