diabao.java

private void setParentId(T parentEntity, List<T> listEntity) {

    try {
        Long parentId = null;
        for (Field field : parentEntity.getClass().getDeclaredFields()) {
            if (field.getDeclaredAnnotation(SequenceId.class) == null) {
                continue;
            }

            PropertyDescriptor pd = BeanUtils.getPropertyDescriptor(parentEntity.getClass(), field.getName());
            parentId = (Long) pd.getReadMethod().invoke(parentEntity);
            break;
        }

        if (parentId == null) {
            return;
        }

        for (T entity : listEntity) {
            for (Field field : entity.getClass().getDeclaredFields()) {
                if (field.getDeclaredAnnotation(ParentId.class) == null) {
                    continue;
                }

                PropertyDescriptor pd = BeanUtils.getPropertyDescriptor(entity.getClass(), field.getName());
                pd.getWriteMethod().invoke(entity, parentId);
                break;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}