在Java中使用流将byte[]的ArrayList转换为byte[]

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

ArrayList<byte[]> byteArrayList = new ArrayList<>();
byte[] data1 = {1, 2, 3};
byte[] data2 = {4, 5, 6};
byteArrayList.add(data1);
byteArrayList.add(data2);

ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
ObjectOutputStream objOutStream = new ObjectOutputStream(byteOutStream);

objOutStream.writeObject(byteArrayList);
objOutStream.flush();

byte[] convertedBytes = byteOutStream.toByteArray();

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

public class ByteArrayListConverter {
    public static void main(String[] args) {
        ArrayList<byte[]> byteArrayList = new ArrayList<>();
        byte[] data1 = {1, 2, 3};
        byte[] data2 = {4, 5, 6};
        byteArrayList.add(data1);
        byteArrayList.add(data2);

        try {
            ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
            ObjectOutputStream objOutStream = new ObjectOutputStream(byteOutStream);
            objOutStream.writeObject(byteArrayList);
            objOutStream.flush();

            byte[] convertedBytes = byteOutStream.toByteArray();
            System.out.println("Converted byte[] length: " + convertedBytes.length);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}