// 读取CSV
CSVReader reader = new CSVReader(new FileReader("data.csv"));
String[] nextLine;
while ((nextLine = reader.readNext()) != null) {
    System.out.println(Arrays.toString(nextLine));
}

// 写入CSV
CSVWriter writer = new CSVWriter(new FileWriter("output.csv"));
String[] entries = {"John", "Doe", "30"};
writer.writeNext(entries);
writer.close();

// 读取CSV
Reader in = new FileReader("data.csv");
Iterable<CSVRecord> records = CSVFormat.DEFAULT.parse(in);
for (CSVRecord record : records) {
    String name = record.get(0);
    String age = record.get(1);
}

// 写入CSV
FileWriter out = new FileWriter("output.csv");
try (CSVPrinter printer = new CSVPrinter(out, CSVFormat.DEFAULT)) {
    printer.printRecord("John", "Doe", 30);
}

CsvMapper mapper = new CsvMapper();
CsvSchema schema = mapper.schemaFor(Person.class).withHeader();
ObjectReader reader = mapper.readerFor(Person.class).with(schema);
List<Person> people = reader.readValues(new File("data.csv")).readAll();

ICsvBeanReader beanReader = new CsvBeanReader(new FileReader("data.csv"), 
    CsvPreference.STANDARD_PREFERENCE);
String[] header = beanReader.getHeader(true);
Person person;
while ((person = beanReader.read(Person.class, header, processors)) != null) {
    System.out.println(person);
}

Reader in = new InputStreamReader(new FileInputStream("data.csv"), "UTF-8");

CSVFormat format = CSVFormat.DEFAULT.withQuote('"');

try (CSVParser parser = CSVParser.parse(file, Charset.defaultCharset(), format)) {
    for (CSVRecord record : parser) {
        // 逐行处理
    }
}