How to deal with commas in the content of the CSV file of the system operation and maintenance series

Problem description:
The CSV file is comma-separated by default, but if the content contains commas, the separation will fail or the array subscript matching will be out of bounds.

Processing method:
(1) Regular expression

//(?=pattern)//Non-acquisition match, positive pre-check, match the search string at the beginning of any string matching pattern, the match does not need to be acquired for later use//(?:pattern) //Non-acquisition match, matches pattern but does not obtain the matching result, and does not store it for later use.This is useful when using the or character "(|)" to combine parts of a pattern.For example "industr(?:y|ies)" is a shorter expression than "industry|industries"//Split commas not enclosed by double quotesline.split(",(?=([^\"]*\"[^\"]*\")*[^\"]*$)")

(2) Use a third-party jar

<dependency><groupId>com.opencsv</groupId><artifactId>opencsv</artifactId><version>4.4</version></dependency>

References:
https://blog.csdn.net/wls_2019/article/details/123225335 Special cases (comma) in reading and writing csv files
https://www.cnblogs.com/allen2333/p/9835654.html Regular Expression - (?!), (?, (?=)
https://blog.csdn.net/superbeyone/article/details/83624241 Java reads CSV file (CSVThe file data content contains comma processing)