java读写csv文件，可以使用库Apache Commons CSV https://commons.apache.org/proper/commons-csv/

引入

implementation 'org.apache.commons:commons-csv:1.8'

读取

Reader in = new FileReader("cookie.csv");
 CSVFormat format = CSVFormat.EXCEL
    .withIgnoreEmptyLines()
    .withIgnoreSurroundingSpaces();
for (CSVRecord record : format.parse(in)) {
    cookieMap.computeIfAbsent(record.get(0), h -> new ArrayList<>())
        .add(record.get(1));
}