private static <T> T convert(ResultSet set, Class<T> clazz) {
        try {
            Constructor<T> constructor = clazz.getConstructor
                    (clazz.getConstructors()[0].getParameterTypes());
            Class<?>[] param = constructor.getParameterTypes();
            Object[] objects = new Object[param.length];
            for (int i = 0; i < param.length; i++) {
                objects[i] = set.getObject(i + 1);
                if (objects[i].getClass() != param[i]) {
                    throw new SQLException("错误类型转换");
                }
            }
            return constructor.newInstance(objects);
        } catch (ReflectiveOperationException | SQLException e) {
            e.printStackTrace();
            return null;
        }
    }