如何在java中使用递归创建子字符串的文件

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class RecursiveSubstringFileCreator {

    public static void main(String[] args) {
        String originalString = "这是一个示例字符串，我们将从中提取子字符串并创建文件。";
        createFilesFromSubstrings(originalString, 0);
    }

    private static void createFilesFromSubstrings(String str, int startIndex) {
        if (startIndex >= str.length()) {
            return; // 递归终止条件
        }

        for (int i = startIndex + 1; i <= str.length(); i++) {
            String substring = str.substring(startIndex, i);
            File file = new File(substring + ".txt");
            try (FileWriter writer = new FileWriter(file)) {
                writer.write(substring);
                System.out.println("创建文件: " + file.getName());
            } catch (IOException e) {
                e.printStackTrace();
            }
            createFilesFromSubstrings(str, i); // 递归调用
        }
    }
}