正则表达式Java - 检查发票号码

Question

I need to build a regular expression for checking the invoice number like this: FV/1024/02/2018我需要构建一个正则表达式来检查发票号码，如下所示： FV/1024/02/2018

FV - using always FV nothing different FV - 始终使用 FV 没什么不同
1024 - next numer of invoice - alway starting with "1" next three numbers are different [0-9] 1024 - 发票的下一个数字 - 总是以“1”开头，接下来的三个数字不同[0-9]
02 - month - always on number 1-12 02 - 月 - 总是在 1-12 号
2018 - a year 2018 - 一年

i have:我有：

Pattern pattern = Pattern.compile("([FV])/((1)[0-9]{3})/([0,1]{1}[0-9]{1})/([0-9]{4})");

and i know..."something" wrong ...我知道……“有事”错了……

Answer 1

This should work这应该工作

FV\/1\d{3}\/(:?(:?0[1-9])|1[0-2])\/\d{4}

FV\\/ matches first, constant part ( FV/ ) string FV\\/首先匹配常量部分 ( FV/ ) 字符串
1\\d{3}\\/ is an invoice number - starting with 1 and followed by 3 digits 1\\d{3}\\/是发票编号 - 以 1 开头，后跟 3 位数字
(:?(:?0[1-9])|1[0-2]) is a month number (:?(:?0[1-9])|1[0-2])是月份数
- (:?0[1-9]) from 01 to 09 OR (:?0[1-9])从01到09或
- 1[1-2] from 10 to 12 1[1-2]从10到12
\\/\\d{4} is slash year, eg /2018 \\/\\d{4}是斜线年份，例如/2018

Answer 2

something like this?像这样的东西？

FV\/\d+\/\d+\/\d+

or或者

FV\/(1[0-9]{3})\/([0,1]{1}[0-9]{1})\/([0-9]{4})

Answer 3

This should work (it matches your given invoice number: 'FV/1024/02/2018'):这应该有效（它与您给定的发票编号匹配：“FV/1024/02/2018”）：

FV\/(1[0-9]{3})\/([0-9]{2})\/([0-9]{4})

The Invoice Number, Month an Year each have their own Group.发票编号，每年每月都有自己的组。