如何读取txt file to byte[]和byte[] to Hashmap<String，Object>？

import java.io.*;

public class ReadTxtFile {
    public static void main(String[] args) {
        String filePath = "path/to/your/file.txt";
        byte[] data = readFileToByteArray(filePath);
        // 使用data进行后续操作
    }

    public static byte[] readFileToByteArray(String filePath) {
        File file = new File(filePath);
        try (FileInputStream fis = new FileInputStream(file);
             ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
            byte[] buffer = new byte[1024];
            int bytesRead;
            while ((bytesRead = fis.read(buffer)) != -1) {
                bos.write(buffer, 0, bytesRead);
            }
            return bos.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

import java.io.*;
import java.util.HashMap;

public class ByteArrayToHashMap {
    public static void main(String[] args) {
        byte[] data = new byte[]{/* your byte array */};
        HashMap<String, Object> map = byteArrayToHashMap(data);
        // 使用map进行后续操作
    }

    public static HashMap<String, Object> byteArrayToHashMap(byte[] data) {
        try (ByteArrayInputStream bis = new ByteArrayInputStream(data);
             ObjectInputStream ois = new ObjectInputStream(bis)) {
            return (HashMap<String, Object>) ois.readObject();
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }
}