将ByteBuffer转换为字节数组java
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Convert ByteBuffer to byte array java
提问by Powisss
Does anyone know how to convert ByteBuffer to byte[] array? I need to get byte array from my ByteBuffer. When I run bytebuffer.hasArrray()it returns no. Every question I looked so far is converting byte array to byteBuffer, but I need it other way around.
Thank you.
有谁知道如何将 ByteBuffer 转换为 byte[] 数组？我需要从我的ByteBuffer. 当我运行时，bytebuffer.hasArrray()它返回 no。到目前为止，我看到的每个问题都是将字节数组转换为 byteBuffer，但我需要其他方式。谢谢你。
采纳答案by nomis
ByteBufferexposes the bulk get(byte[])method which transfers bytes from the buffer into the array. You'll need to instantiate an array of length equal to the number of remaining bytes in the buffer.
ByteBuffer公开get(byte[])将字节从缓冲区传输到数组的批量方法。您需要实例化一个长度等于缓冲区中剩余字节数的数组。
ByteBuffer buf = ...
byte[] arr = new byte[buf.remaining()];
buf.get(arr);
回答by Stephen C
If hasArray()reports falsethen, calling array()will throw an exception.
如果hasArray()报告false然后，调用array()将抛出异常。
In that case, the only way to get the data in a byte[]is to allocate a byte[]and copy the bytes to the byte[]using get(byte)or similar.
在这种情况下，获取 a 中数据的唯一方法byte[]是分配 abyte[]并将字节复制到byte[]usingget(byte)或类似的。
