将InputStream表示为ByteBuffer而不将整个内容加载到数组中的java

import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;

public class InputStreamToByteBuffer {
    public static ByteBuffer convert(InputStream inputStream) throws IOException {
        ReadableByteChannel channel = Channels.newChannel(inputStream);
        ByteBuffer buffer = ByteBuffer.allocate(1024); // 设置缓冲区大小
        while (channel.read(buffer) != -1) {
            if (!buffer.hasRemaining()) {
                buffer = resizeBuffer(buffer); // 如果缓冲区已满，重新调整大小
            }
        }
        buffer.flip(); // 切换为读模式
        return buffer;
    }

    private static ByteBuffer resizeBuffer(ByteBuffer buffer) {
        ByteBuffer newBuffer = ByteBuffer.allocate(buffer.capacity() * 2); // 扩大缓冲区大小
        buffer.flip(); // 切换为读模式
        newBuffer.put(buffer); // 将旧缓冲区内容复制到新缓冲区
        return newBuffer;
    }
}