java - 将 csv 字符串转换为带有双引号键/值的 Map

Question

我正在努力将 CSV 字符串转换为 Map。我可以转换它，但问题是我需要使用双引号获取 Map 中的键和值""

input string: "fname", "lname", ...... \n "ramprakash","seepana",...

Getting data [fname=ramprakash, lname=seepana, ...]

Expected data is: ["fname"="ramprakash", "lname"="seepana", ...]

如何实现这一目标？

Answer 1

假设您的 CSV 如下所示:

"fname", "lname"
"ramprakash","seepana"
"ramprakash1","seepana1"

要拥有 "，您需要在 CsvSchema 中禁用引号字符。示例:

import com.fasterxml.jackson.databind.MappingIterator;
import com.fasterxml.jackson.dataformat.csv.CsvMapper;
import com.fasterxml.jackson.dataformat.csv.CsvSchema;

import java.io.File;
import java.util.Map;

public class JsonApp {

    public static void main(String[] args) throws Exception {
        File csv = new File("./resource/test.csv").getAbsoluteFile();

        CsvMapper mapper = new CsvMapper();

        CsvSchema schema = CsvSchema
                .emptySchema()
                .withHeader()
                .withColumnSeparator(',')
                .withoutQuoteChar();

        MappingIterator<Map<String, String>> it = mapper
                .readerFor(Map.class)
                .with(schema)
                .readValues(csv);


        while (it.hasNext()) {
            System.out.println(it.next());
        }
    }
}

上面的代码打印:

{"fname"="ramprakash", "lname"="seepana"}
{"fname"="ramprakash1", "lname"="seepana1"}