CSVPrinter 仅删除标题中的引号

Question

当值被引用时，我需要在模式下使用 Apache 公共资源中的 CSVPrinter，但标头不是。看起来报价模式是唯一的选项，影响标题和值。这个可以独立完成吗？

CSVFormat format = CSVFormat.DEFAULT.withHeader(new String(){"a", "b"})
                .withQuoteMode(QuoteMode.ALL);
CSVPrinter printer = new CSVPrinter(new FileWriter(new File("out.csv")), format);
printer.printRecord("a val", "b val");
printer.printRecord("1", "2");
printer.flush();
printer.close();

给出：

"a", "b"
"a val", "b val"
"1", "2"

但要求是这样的：

a,b
"a val", "b val"
"1", "2"

Answer 1

您可以使用一种格式作为标题，使用另一种格式作为记录：

FileWriter writer = new FileWriter(new File("out.csv"));
CSVFormat formatHeader = CSVFormat.DEFAULT
                    .withHeader(new String[]{"a", "b"})
                    .withEscape('"').withQuoteMode(QuoteMode.NONE);
CSVFormat formatRecord = CSVFormat.DEFAULT.withQuoteMode(QuoteMode.ALL);
CSVPrinter headerPrinter = new CSVPrinter(writer, formatHeader);
headerPrinter.flush();
CSVPrinter recordPrinter = new CSVPrinter(writer, formatRecord);
recordPrinter.printRecord("a val", "b val");
recordPrinter.printRecord("1", "2");
recordPrinter.flush();
recordPrinter.close();
headerPrinter.close();