code: public static Object invoke(final Object bean, Class clazz, final String name) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
          Method method = clazz.getDeclaredMethod(name);
          method.setAccessible(true);
          return method.invoke(bean);
      }
docs: 执行无参方法
  @param bean
  @param clazz
  @param name
  @return
  @throws NoSuchMethodException
  @throws InvocationTargetException
  @throws IllegalAccessException