正则表达式精确匹配一个逗号分隔的字符串

Question

Example:

src: anyword, anyword, anyword

I want to check if src contains only one comma separated strings like given in example

I wrote (.[^\\s*]+,.*[^,\\s*]+$) this but it's failing with some scenarios

For me, following scenarios are not valid

src: abc, ,1232
src: ,abc, dasf

demo: https://regex101.com/r/UyQ5KX/1

Answer 1

You may use

: *[^\s,]+(?:, *[^,\s]+)*$

Or, to allow more whitespaces than just space between words:

:[^\S\n\v\f\r\u2028\u2029]*[^\s,]+(?:,[^\S\n\v\f\r\u2028\u2029]*[^,\s]+)*$

See the regex demo

If there must be 1+ non-colon chars from the start of string till the colon, you may add ^[^:]+ before the patterns above.

Details

• ^ - start of string
• [^:]+ - 1+ chars other than :
• : - a colon
• [^\\S\\n\\v\\f\\r\
\
]* - 0 or more occurrences of only horizontal whitespaces
• [^\\s,]+ - 1 or more occurrences of characters other than whitespace and comma
• (?:,[^\\S\\n\\v\\f\\r\
\
]*[^,\\s]+)* - 0 or more occurrences of
  • , - a comma
  • [^\\S\\n\\v\\f\\r\
\
]* - 0 or more occurrences of only horizontal whitespaces
  • [^\\s,]+ - 1 or more occurrences of characters other than whitespace and comma
• $ - end of string.