Jackson CsvMapper 只读取第一行

Question

我想将 csv 文件读入字符串列表。我还希望它修剪空格并允许尾随逗号。我的 csv 文件如下所示:

abcdefghijklmno ,
pqrstuwzabcdefh,
ijklmnopqrstuwyz,
zabcdefghijklmopqr,

当我尝试使用我的方法解析它时:

fun parseCsv(inputStream: InputStream): List<String> {
        val mapper = CsvMapper().enable(CsvParser.Feature.TRIM_SPACES).enable(CsvParser.Feature.ALLOW_TRAILING_COMMA)
        val schema = CsvSchema
            .emptySchema()
            .withLineSeparator("\n")
            .withColumnSeparator(',')
            .withQuoteChar('"')
        return try {
            mapper
                .readerFor(String::class.java)
                .with(schema)
                .readValues<String>(inputStream)
                .readAll()
        } catch (e: IOException ) {
            logger.error("Error parsing file", e)
            emptyList()
        } catch (e: NoSuchElementException) {
            throw FileParsingError(e)
        }
    }

我得到:

expected == actual
|        |  |
|        |  [abcdefghijklmno, ]
|        false
[abcdefghijklmno, pqrstuwzabcdefh, ijklmnopqrstuwyz, zabcdefghijklmopqr]

如何解决？

Answer 1

这对我有用:

return mapper.readerForListOf(Map.class)
    .with(schema)
    .with(CsvParser.Feature.WRAP_AS_ARRAY) // <-- This.
    .readTree(content);