可以尝试在读取数据时判断读取的字节数是否为-1，若为-1则表示流已结束。

示例代码：

AsynchronousSocketChannel socketChannel = AsynchronousSocketChannel.open();
ByteBuffer buffer = ByteBuffer.allocate(1024);
socketChannel.read(buffer, attachment, new CompletionHandler() {
    @Override
    public void completed(Integer result, Object attachment) {
        if (result == -1) {
            // 流已结束
            return;
        }
        // 处理接收到的数据
        // ...

        // 继续读取数据
        socketChannel.read(buffer, attachment, this);
    }

    @Override
    public void failed(Throwable exc, Object attachment) {
        // 处理异常
        // ...
    }
});