Java：基于2个分隔符的regex split（）

Question

I want to split a string when space is followed by comma.

My input String :

go back, to work !  ,2012-10-01 07:01:45,,  1

Output Expected:

"go back, to work !"    
"2012-10-01 07:01:45,,1"

Code I tried:

String[] b1=a1.split("[\\s,]");

But this splits the string only based on whitespaces. I want to split it when there is both whitespace and comma not just either one. What should I do?

Answer 1

Split on space followed by comma :

String[] b1 = a1.split("\\s,");

[\\\\s,] is a character class and it will split on space or comma.

Answer 2

使用此选项可在出现空格时分割字符串，然后出现逗号。

String[] b1 = a1.split(" ,");

Answer 3

Split on space followed by comma using ("\\\\s,") will not give you the desired output of

"go back, to work !"

"2012-10-01 07:01:45"

1

The output will be

go back, to work !

2012-10-01 07:01:45,, 1

Either you can use comma followed by space or space followed by comma using "\\\\s,|,\\\\s" then you will get below output

go back

to work !

2012-10-01 07:01:45,

1

However it's still not same as what you wanted. You might want to clarify your requirement.