netty查看ByteBuf工具

 
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
 
import static io.netty.buffer.ByteBufUtil.appendPrettyHexDump;
import static io.netty.util.internal.StringUtil.NEWLINE;
 
public class nettyxxx {
    public static void main(String[] args) {
        ByteBuf buf= ByteBufAllocator.DEFAULT.buffer(10);
            buf.writeBytes(new byte[]{'a','b','c','d','e','f','g','h'});
            log(buf);
    }
    private 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());
    }
}