Date createTime = book.getCreateTime();
   Date updateTime = book.getUpdateTime();
   
   //属性值处理
   BeanUtils.copyProperties(book, entity);
   
   entity.setCreateTime(LocalDateTimeUtil.dateToLocalDateTime(createTime));
   entity.setUpdateTime(LocalDateTimeUtil.dateToLocalDateTime(updateTime));

LocalDateTimeUtil.java

public static LocalDateTime dateToLocalDateTime(Date date) {
     LocalDateTime localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();
        return localDate;
    }