This question already has an answer here:
这个问题在这里已有答案:
- Regex expression for decimal number 3 answers
十进制数3答案的正则表达式
Could any of you help me with a regex to allow this:
你们中的任何一个人都可以用正则表达式来帮助我:
123.123123.1323.21.23121,23123123,32123,123412so to sum up: only one decimal point, it can be the last one.. but most not be the first.
总结一下:只有一个小数点,它可以是最后一个......但大多数不是第一个。
but not this:
但不是这个:
12.323.3231213..12331...3123.12313,123132 4 个解决方案
#1
This should work
这应该工作
^\d+[\.,]?\d*$
^ start of the string\d+ 1 or more digits[\.,]? 0 or 1 decimal or comma\d* 0 or more digits$ end of string.
^字符串开头\ d + 1位或更多位数[\。,]? 0或1十进制或逗号\ d * 0或更多数字$ end of string。
#2
\b\d+(\.|,)\d*\bwhich means:
a word boundarya digit one or more timesa `.` or a `,`a digit zero or more timesa word boundaryThe word boundaries are there to prevent the regex matching from the middle of a number
单词边界用于防止正则数字中间的正则表达式匹配
#3
Try this, it works with all cases that you mention.
试试这个,它适用于你提到的所有情况。
(\d+)(((\.|,)\d+)|,))
#4
My fix for your regex: (\d+)(((.|,)\d+)|,)?Added '?' to end, it will works for zero value
我对你的正则表达式的修复:( \ d +)(((。|,)\ d +)|,)?添加'?'结束,它将适用于零价值
#1
This should work
这应该工作
^\d+[\.,]?\d*$
^ start of the string\d+ 1 or more digits[\.,]? 0 or 1 decimal or comma\d* 0 or more digits$ end of string.
^字符串开头\ d + 1位或更多位数[\。,]? 0或1十进制或逗号\ d * 0或更多数字$ end of string。
#2
\b\d+(\.|,)\d*\bwhich means:
a word boundarya digit one or more timesa `.` or a `,`a digit zero or more timesa word boundaryThe word boundaries are there to prevent the regex matching from the middle of a number
单词边界用于防止正则数字中间的正则表达式匹配
#3
Try this, it works with all cases that you mention.
试试这个,它适用于你提到的所有情况。
(\d+)(((\.|,)\d+)|,))
#4
My fix for your regex: (\d+)(((.|,)\d+)|,)?Added '?' to end, it will works for zero value
我对你的正则表达式的修复:( \ d +)(((。|,)\ d +)|,)?添加'?'结束,它将适用于零价值