Java 如何将 ByteBuffer 的内容放入 OutputStream？
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How to put the content of a ByteBuffer into an OutputStream?
提问by Jason S
I need to put the contents of a java.nio.ByteBufferinto an java.io.OutputStream. (wish I had a Channelinstead but I don't) What's the best way to do this?
我需要将 a 的内容java.nio.ByteBuffer放入java.io.OutputStream. （希望我有一个，Channel但我没有）这样做的最佳方法是什么？
I can't use the ByteBuffer's array()method since it can be a read-only buffer.
我不能使用 ByteBuffer 的array()方法，因为它可以是只读缓冲区。
I also may be interspersing writes to the OutputStream between using this ByteBuffer and having a regular array of byte[]which I can with use OutputStream.write()directly.
我也可能在使用这个 ByteBuffer 和拥有一个byte[]我可以OutputStream.write()直接使用的常规数组之间穿插写入 OutputStream 。
采纳答案by ng.
Look at Channels.newChannel(OutputStream). It will give you a channel given an OutputStream. With the WritableByteChannel adapter you can provide the ByteBuffer which will write it to the OutputStream.
看看Channels.newChannel(OutputStream)。它会给你一个给定 OutputStream 的通道。使用 WritableByteChannel 适配器，您可以提供将其写入 OutputStream 的 ByteBuffer。
public void writeBuffer(ByteBuffer buffer, OutputStream stream) {
WritableByteChannel channel = Channels.newChannel(stream);
channel.write(buffer);
}
This should do the trick!
这应该可以解决问题！
