将嵌套的Json文件转换为java中的CSV

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.13.0</version>
</dependency>
<dependency>
    <groupId>com.opencsv</groupId>
    <artifactId>opencsv</artifactId>
    <version>5.5.2</version>
</dependency>

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.opencsv.CSVWriter;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class JsonToCsvConverter {

    public static void main(String[] args) {
        String jsonFilePath = "path/to/your/nested.json";
        String csvFilePath = "path/to/your/output.csv";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode rootNode = objectMapper.readTree(new File(jsonFilePath));

            List<String[]> csvData = new ArrayList<>();
            flattenJson(rootNode, csvData, new ArrayList<>());

            try (CSVWriter csvWriter = new CSVWriter(new FileWriter(csvFilePath))) {
                csvWriter.writeAll(csvData);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void flattenJson(JsonNode node, List<String[]> csvData, List<String> currentPath) {
        if (node.isObject()) {
            Iterator<String> fieldNames = node.fieldNames();
            while (fieldNames.hasNext()) {
                String fieldName = fieldNames.next();
                List<String> newPath = new ArrayList<>(currentPath);
                newPath.add(fieldName);
                flattenJson(node.get(fieldName), csvData, newPath);
            }
        } else if (node.isArray()) {
            for (int i = 0; i < node.size(); i++) {
                List<String> newPath = new ArrayList<>(currentPath);
                newPath.add(String.valueOf(i));
                flattenJson(node.get(i), csvData, newPath);
            }
        } else {
            String[] row = new String[currentPath.size() + 1];
            for (int i = 0; i < currentPath.size(); i++) {
                row[i] = currentPath.get(i);
            }
            row[currentPath.size()] = node.asText();
            csvData.add(row);
        }
    }
}