Java 中使用 OpenCSV 实现 CSV 文件读写操作的技巧

<dependency>
    <groupId>com.opencsv</groupId>
    <artifactId>opencsv</artifactId>
    <version>4.6</version>
</dependency>

import com.opencsv.CSVReader;

import java.io.FileReader;
import java.io.IOException;

public class CSVReaderExample {
    public static void main(String[] args) {
        String csvFile = "students.csv"; // CSV文件的路径

        try (CSVReader reader = new CSVReader(new FileReader(csvFile))) {
            String[] nextRecord;

            while ((nextRecord = reader.readNext()) != null) {
                for (String cell : nextRecord) {
                    System.out.print(cell + "    ");
                }
                System.out.println();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import com.opencsv.CSVWriter;

import java.io.FileWriter;
import java.io.IOException;

public class CSVWriterExample {
    public static void main(String[] args) {
        String csvFile = "students.csv"; // CSV文件的路径

        try (CSVWriter writer = new CSVWriter(new FileWriter(csvFile))) {
            String[] header = {"Name", "Age", "Grade"};
            writer.writeNext(header);

            String[] record1 = {"Alice", "18", "A"};
            writer.writeNext(record1);

            String[] record2 = {"Bob", "17", "B"};
            writer.writeNext(record2);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}