private  Map<String, Object> introspect(Object obj) throws Exception {        Map<String, Object> result = new HashMap<String, Object>();        BeanInfo info = Introspector.getBeanInfo(obj.getClass());        for (PropertyDescriptor pd : info.getPropertyDescriptors()) {            Method reader = pd.getReadMethod();            if (reader != null)                result.put(pd.getName(), reader.invoke(obj));        }        return result;    }