匹配数字和字符串的正则表达式(Regular expression for matching numbers and strings)

匹配数字和字符串的正则表达式(Regular expression for matching numbers and strings)

我有一系列的话，如下所示

476pe e586 9999 rrr ABCF

我必须编写一个正则表达式，将数字和数字与字母匹配。从上面的字符串我必须匹配

476pe e586 9999

我试着编写一个正则表达式，如下所示

^[\D]*[0-9]+[\D]*$

但它不起作用。 我尝试使用在线正则表达式工具http://rubular.com/r/HQE2vG0pbu ，它显示整个字符串匹配。

i have series of words as given below

476pe e586 9999 rrr ABCF

i have to write a regular expression that will match the numbers and numbers with alphabets.From the above strings i have to match only

476pe e586 9999

I tried to write a regular expression as given below

^[\D]*[0-9]+[\D]*$

but it doesn't work. I tried this with an online regex tool, http://rubular.com/r/HQE2vG0pbu and it shows that the entire string is matching.

最满意答案

正则表达式的问题在于\D可以是除数字之外的任何内容 ，因此它将错误地匹配该位置中具有特殊字符的字符串，并且无法匹配具有多个数字组的字符串。

相反，尝试^[0-9a-zA-Z]*[0-9][0-9a-zA-Z]*$ 。 这将匹配任意数量的数字或字母，后跟数字，以及任意数量的数字或字母。

这是一个演示 ......

The problem with your regex is that \D can be anything except a number, so it will wrongly match strings with special characters in that position, and fail to match strings with more than one group of numbers.

Instead, try something like ^[0-9a-zA-Z]*[0-9][0-9a-zA-Z]*$. This will match any numbers of numbers or letters, followed by a number, and again any number of numbers or letters.

And here's a demo...