Javacsv实现Java读写csv文件

<dependency>
  <groupId>net.sourceforge.javacsv</groupId>
  <artifactId>javacsv</artifactId>
  <version>2.0</version>
</dependency>

public static void writeCSV() {
  // 定义一个CSV路径
  String csvFilePath = "D://StemQ.csv";
  try {
    // 创建CSV写对象 例如:CsvWriter(文件路径，分隔符，编码格式);
    CsvWriter csvWriter = new CsvWriter(csvFilePath, ',', Charset.forName("UTF-8"));
    // 写表头
    String[] csvHeaders = { "编号", "姓名", "年龄" };
    csvWriter.writeRecord(csvHeaders);
    // 写内容
    for (int i = 0; i < 20; i++) {
      String[] csvContent = { i + "000000", "StemQ", "1" + i };
      csvWriter.writeRecord(csvContent);
    }
    csvWriter.close();
    System.out.println("--------CSV文件已经写入--------");
  } catch (IOException e) {
    e.printStackTrace();
  }
}

public static void readCSV() {
  try {
    // 用来保存数据
    ArrayList<String[]> csvFileList = new ArrayList<String[]>();
    // 定义一个CSV路径
    String csvFilePath = "D://StemQ.csv";
    // 创建CSV读对象 例如:CsvReader(文件路径，分隔符，编码格式);
    CsvReader reader = new CsvReader(csvFilePath, ',', Charset.forName("UTF-8"));
    // 跳过表头 如果需要表头的话，这句可以忽略
    reader.readHeaders();
    // 逐行读入除表头的数据
    while (reader.readRecord()) {
      System.out.println(reader.getRawRecord()); 
      csvFileList.add(reader.getValues()); 
    }
    reader.close();
    
    // 遍历读取的CSV文件
    for (int row = 0; row < csvFileList.size(); row++) {
      // 取得第row行第0列的数据
      String cell = csvFileList.get(row)[0];
      System.out.println("------------>"+cell);
    }
  } catch (IOException e) {
    e.printStackTrace();
  }
}