Copy InputStream, abort operation if size exceeds limit

Question

I tried to copy an InputStream to a File, and abort the copy if the size of InputStream is greater than 1MB. In Java7, I wrote code as below:

public void cop         


        

Answer 1

Much more convenient and faster solution to check size of input stream  

    FileChannel chanel = (FileChannel) Channels.newChannel(inputStream);
    MappedByteBuffer buffer = chanel.map(FileChannel.MapMode.READ_ONLY, 0, chanel.size());

    System.out.println(buffer.capacity()); // bytes