import io.netty.buffer.ByteBuf;
import static io.netty.buffer.ByteBufUtil.appendPrettyHexDump;
import static io.netty.util.internal.StringUtil.NEWLINE;
public class NettyUtils {public static void log(ByteBuf buffer) {int length = buffer.readableBytes();
int rows = length / 16 + (length % 15 == 0 ? 0 : 1) + 4;
StringBuilder buf = new StringBuilder(rows * 80 * 2)
.append("read index:").append(buffer.readerIndex())
.append("write index:").append(buffer.writerIndex())
.append("capacity:").append(buffer.capacity())
.append(NEWLINE);
appendPrettyHexDump(buf, buffer);
System.out.println(buf.toString());
}
}