将map转换为字节

import java.io.ByteArrayOutputStream;
import java.io.ObjectOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class MapToBytes {
    public static void main(String[] args) {
        Map<String, Integer> map = new HashMap<>();
        map.put("key1", 1);
        map.put("key2", 2);

        try {
            byte[] bytes = mapToBytes(map);
            System.out.println("Map转换为字节成功！");
        } catch (IOException e) {
            System.out.println("Map转换为字节失败：" + e.getMessage());
        }
    }

    public static byte[] mapToBytes(Map<String, Integer> map) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(map);
        oos.close();
        return baos.toByteArray();
    }
}