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Copy the content of an input stream to an output stream

How to copy the content of an input stream to an output stream

/**
* Copy the content of the input stream into the output stream, using a temporary
* byte array buffer whose size is defined by {@link #IO_BUFFER_SIZE}.
*
* @param in The input stream to copy from.
* @param out The output stream to copy to.
*
* @throws IOException If any error occurs during the copy.
*/
private static final int IO_BUFFER_SIZE = 4 * 1024;

private static void copy(InputStream in, OutputStream out) throws IOException {
   byte[] b = new byte[IO_BUFFER_SIZE];
   int read;
   while ((read = in.read(b)) != -1) {
      out.write(b, 0, read);
   }
}
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