Each Alipay coupon has an 18-digit integer ID, and the consumption code on WeChat's coupon is 12 digits. I would like to know how this 18-digit unique ID is generated. Aren't they generally 64-bit? Or UUiD
世界只因有你2017-06-12 09:25:08
http://www.wangtao.pw/admin/d... Use java to generate pure numeric unique IDs (no database involved. Customized number of digits)
伊谢尔伦2017-06-12 09:25:08
You can read this article from Meituan, it should be helpful to you http://tech.meituan.com/MT_Le...