我尝试将SQL查询结果更改为CSV格式，然后将其发送到API进行处理。当我使用CSVPrinter（org.apache.commons.csv.CSVPrinter）时，它总是添加："org.apache.commons.csv.CSVPrinter@5ec70441"到输出。
我想知道这是因为我使用它的方式，还是因为它是一个标准的东西，我需要首先解析出来？
这是代码，我尝试了几种方法输出CSV，但每次都得到相同的东西。

public void ScoreTable(String tableName) throws SQLException, IOException {
    DataB db = new DataB();
    ResultSet rs;
    rs = db.executeQuery("SELECT NtNo, SchedDate, SchedTime, Duration, WC, Sequence, CBy FROM " + tableName + " ");
    BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));
    CSVPrinter csvPrinter;
    csvPrinter = new CSVPrinter(writer, CSVFormat.DEFAULT.withHeader(rs));
    csvPrinter.printRecords(rs);
    String scoreCSV = csvPrinter.toString();
    System.out.println("String contains: " + scoreCSV);
    csvPrinter.close();
    populateScore pa = new populateScore();
    String theScore = pa.getCsvScore("21", scoreCSV);
    System.out.println("API outputs : " + theScore);
}