Main.java - master - akupan2012/XMLtoJONS

Main.java
123 строки4 KB
akupan2012
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25 фев 2026, 21:56
25 фев 2026, 21:564ca840b
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Employee> list = parseXML("data.xml");


        String json = listToJson(list);


        writeString(json, "data2.json");

        System.out.println("Программа успешно завершена!");
    }

    public static List<Employee> parseXML(String fileName) {
        List<Employee> employees = new ArrayList<>();

        try {

            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();


            Document document = builder.parse(new File(fileName));


            Element root = document.getDocumentElement();


            NodeList nodeList = root.getChildNodes();


            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);


                if (node.getNodeType() == Node.ELEMENT_NODE &&
                        node.getNodeName().equals("employee")) {

                    Element employeeElement = (Element) node;


                    int id = Integer.parseInt(getTagValue(employeeElement, "id"));
                    String firstName = getTagValue(employeeElement, "firstName");
                    String lastName = getTagValue(employeeElement, "lastName");
                    String country = getTagValue(employeeElement, "country");
                    int age = Integer.parseInt(getTagValue(employeeElement, "age"));


                    Employee employee = new Employee(id, firstName, lastName, country, age);
                    employees.add(employee);

                    System.out.println("Найден сотрудник: " + employee);
                }
            }

        } catch (ParserConfigurationException | SAXException | IOException e) {
            System.out.println("Ошибка при парсинге XML: " + e.getMessage());
            e.printStackTrace();
        }

        return employees;
    }


    private static String getTagValue(Element element, String tagName) {
        NodeList nodeList = element.getElementsByTagName(tagName);
        if (nodeList.getLength() > 0) {
            Node node = nodeList.item(0);
            return node.getTextContent();
        }
        return "";
    }

    public static String listToJson(List<Employee> list) {
        StringBuilder json = new StringBuilder();
        json.append("[\n");

        for (int i = 0; i < list.size(); i++) {
            Employee emp = list.get(i);
            json.append("  {\n");
            json.append("    \"id\": ").append(emp.getId()).append(",\n");
            json.append("    \"firstName\": \"").append(emp.getFirstName()).append("\",\n");
            json.append("    \"lastName\": \"").append(emp.getLastName()).append("\",\n");
            json.append("    \"country\": \"").append(emp.getCountry()).append("\",\n");
            json.append("    \"age\": ").append(emp.getAge()).append("\n");
            json.append("  }");

            if (i < list.size() - 1) {
                json.append(",");
            }
            json.append("\n");
        }

        json.append("]");
        return json.toString();
    }

    public static void writeString(String json, String fileName) {
        try (FileWriter writer = new FileWriter(fileName)) {
            writer.write(json);
            System.out.println("JSON успешно записан в файл " + fileName);
        } catch (IOException e) {
            System.out.println("Ошибка при записи файла: " + e.getMessage());
            e.printStackTrace();
        }
    }
}