java/org/example/Main.java - master - siman_coder/JUnit

java/org/example/Main.java

46 строк2 KB

siman_coder

Create: CsvJsonParser.java, Employee.java, Main.java, CsvJsonParserTest.java, build.gradle, data.csv, data.json, data.xml, data2.json

07 июл 2026, 11:23

Верифицирован

07 июл 2026, 11:231a342fc

package org.example;

import java.util.List;

public class Main {
    public static void main(String[] args) {
        // ============ ЗАДАЧА 1: CSV -> JSON ============
        System.out.println("=== Задача 1: CSV -> JSON ===");
        String[] columnMapping = {"id", "firstName", "lastName", "country", "age"};
        String csvFileName = "data.csv";

        List<Employee> csvList = CsvJsonParser.parseCSV(columnMapping, csvFileName);
        if (csvList != null && !csvList.isEmpty()) {
            String jsonFromCsv = CsvJsonParser.listToJson(csvList);
            CsvJsonParser.writeString(jsonFromCsv, "data.json");
            System.out.println("CSV -> JSON успешно создан!");
        }

        // ============ ЗАДАЧА 2: XML -> JSON ============
        System.out.println("\n=== Задача 2: XML -> JSON ===");
        String xmlFileName = "data.xml";

        List<Employee> xmlList = CsvJsonParser.parseXML(xmlFileName);
        if (xmlList != null && !xmlList.isEmpty()) {
            String jsonFromXml = CsvJsonParser.listToJson(xmlList);
            CsvJsonParser.writeString(jsonFromXml, "data2.json");
            System.out.println("XML -> JSON успешно создан!");
        }

        // ============ ЗАДАЧА 3: JSON -> Java ============
        System.out.println("\n=== Задача 3: JSON -> Java ===");
        String jsonFileName = "data.json";

        List<Employee> employeesFromJson = CsvJsonParser.jsonToList(jsonFileName);
        if (employeesFromJson != null && !employeesFromJson.isEmpty()) {
            System.out.println("Парсинг JSON в Java объекты:");
            for (Employee emp : employeesFromJson) {
                System.out.println(emp);
            }

            String outputJson = CsvJsonParser.listToJson(employeesFromJson);
            CsvJsonParser.writeString(outputJson, "output.json");
            System.out.println("Результат сохранен в output.json");
        }
    }
}