I have gone through other questions regarding this on StackOverflow but libraries mentioned there only allow to read or write. Some of them do allow partial read or write like SuperCSV but no library can be used for updating value of a particular cell. Is there some other library that can be used or do I need to do it manually?
Read in the CSV, modify the cell you want, then write it back to the file.
No, there is no way to directly update the cell in CSV file. You can read CSV line by line and then column by column , update the cell (content) and write to a new file.
And if you know the pattern(regex) then you can use String.replace() method.
来源：https://stackoverflow.com/questions/11035602/is-there-any-way-to-change-value-of-a-particular-cell-in-a-csv-file-in-java