只能匹配汉字，数字，字母

I like have a utility that I use to load records in a DB. I usually save of data as csv, but the utility uses a slightly different (in my opinion simpler) format. The default delimiter is a '|' character. So I need to convert all the commas in the csv to '|', but I don't want to convert commas th...

^(?!.*(\w)\1{1,}).+$