you can't handle it in principle. A csv is a text file with characters separated by commas.
if you really need to deal with this kind of data, it is recommended to use other formats such as xslx

it is recommended that you directly use the relevant class libraries to deal with it. For example, apache common has a csv utility class, which will help you with the parsing of these contents.

in principle, if your csv contains , , then you should use quotation marks "

$ echo -e 'col1,col2,col3\ncol2-1,col2- 2,"col2,3"' | csvlook
| col1   | col2    | col3   |
| ------ | ------- | ------ |
| col2-1 | col2- 2 | col2,3 |