定期表达以下字符串 [英] Regular expressing for the following string

问题描述

我有字符串，其字母数字如下所示。



例1：abc1232323acvc23232avac

Ex 2：abc1232bcsb



这里我想检查字符串是否为字母数字以及连续数字长度不应超过7.





我试过但我无法得到正确的正则表达式。



请帮助我这个



我尝试了什么：



尝试用

I have string with is having the alpha numeric noted as below.

Ex 1: abc1232323acvc23232avac
Ex 2: abc1232bcsb

Here I want to check the string is alpha number as well as continuous numeric length should not exceed more than 7.


I have tried but I couldn't get the proper regular expression.

Kindly help me on this

What I have tried:

Tried with

(([a-z]+[0-9]+)+|(([0-9]+[a-z]+)+))[0-9a-z]{0.7}*

推荐答案

您的RegEx很奇怪，替换 {0.7} 带 {0,7} 来控制重复。最后的 * 也是一个错误。

使用上一个链接查看你的RegEx的一个很好的图表，它可能有助于理解什么是错误。



几个有趣的链接，帮助构建和调试RegEx。

以下是RegEx文档的链接：

perlre - perldoc.perl.org [ ^ ]

以下是帮助构建RegEx并调试它们的工具的链接：

.NET正则表达式测试程序 - 正则表达式风暴 [ ^ ]

Expresso正则表达式工具 [ ^ ]

RegExr：Learn，Build，&测试RegEx [ ^ ]

此节目RegEx是一个很好的图表，它非常有助于理解RegEx的作用：

Debuggex：在线可视正则表达式测试器。 JavaScript，Python和PCRE。 [ ^ ]

Your RegEx is weird, replace {0.7} with {0,7} to control repeat. The * at the end is an error too.
Use last link to see a nice diagram of your RegEx, it may help to anderstand what is wrong.

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]

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