如何从文件中获取ByteData

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class FileToByteDataExample {
    public static void main(String[] args) {
        File file = new File("path/to/file"); // 替换为目标文件的路径

        try (FileInputStream fis = new FileInputStream(file);
             FileChannel channel = fis.getChannel()) {

            ByteBuffer buffer = ByteBuffer.allocate((int) file.length());
            channel.read(buffer);
            buffer.flip();

            byte[] byteData = buffer.array();
            
            // 此时byteData即为从文件中获取到的ByteData

            // 对ByteData进行进一步处理或使用
            // ...

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}