Data truncation: Incorrect datetime value: '' for column 'create_time' at row 1 问题

        //取当前时间
        Date nowdate=new Date();
        //转换时间格式
        SimpleDateFormat simpleDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        order.setCreateTime(Timestamp.valueOf(simpleDate.format(nowdate)));