如何编写将所有covid 19数据中的CSV文件转换为JSON的Java程序

Question

他们希望我们结合使用ArrayList（或常规数组）和Map Collections Hashmap或Tree Map之一。转换将涉及逐行读取数据文件到适当的结构中。使用称为read_records的方法执行此操作。填充结构后，将其发送到名为print_records的方法，该方法将以以下格式将其打印出来：

"ABW" :  { 
"2020-03-13" :  {
    "iso_code" : "ABW",
    "location" : "Aruba",
    "date" : "2020-03-13",
    "total_cases" : "2",
    "new_cases" : "2",
    "total_deaths" : "0",
    "new_deaths" : "0",
    "total_cases_per_million" : "18.733",
    "new_cases_per_million" : "18.733",
    "total_deaths_per_million" : "0.0",
    "new_deaths_per_million" : "0.0",
    "total_tests" : "",
    "new_tests" : "",
    "total_tests_per_thousand" : "",
    "new_tests_per_thousand" : "",
    "new_tests_smoothed" : "",
    "new_tests_smoothed_per_thousand" : "",
    "tests_units" : "",
    "stringency_index" : "0.0",
    "population" : "106766.0",
    "population_density" : "584.8",
    "median_age" : "41.2",
    "aged_65_older" : "13.085",
    "aged_70_older" : "7.452",
    "gdp_per_capita" : "35973.781",
    "extreme_poverty" : "",
    "cvd_death_rate" : "",
    "diabetes_prevalence" : "11.62",
    "female_smokers" : "",
    "male_smokers" : "",
    "handwashing_facilities" : "",
    },
    .
    .
    .
},
.
.
.

结构化程序，以便在名为JSONParser的类中使用适当的方法。通过将处理分为读取，写入和/或分析输入数据的单独方法来确保良好的程序结构。

这里是我到目前为止的代码：

public class CSVParser {
    private final int ISO_CODE = 0;
    private final int DATE = 2;

    public CSVParser(File f) throws FileNotFoundException {
        try {
            Scanner covid_data = new Scanner(f);
            String header = covid_data.nextLine();

            while(covid_data.hasNextLine()) {
                String line = covid_data.nextLine();
                String record[] = line.split(",");
                String date = record[DATE];
                System.out.println(record[ISO_CODE] + ":");

                for(String s : record) System.out.println("       "+s);
                System.out.println();
            }

            covid_data.close();

        } catch(FileNotFoundException e) {
            System.out.println("Problem with file"); 
        }
    }
}

这里是主要班级：

import java.io.File;
import java.io.FileNotFoundException;

/*
 *
Put the header comment here
*/
public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        File f = new File("owid-covid-data.csv");
        CSVParser csvfile = new CSVParser(f);
    }
}