roaringbitmap序列化成字符串
import org.roaringbitmap.RoaringBitmap;
import java.nio.ByteBuffer;
import java.util.Base64;
public class Demo {
public static void main(String[] args) {
RoaringBitmap r = new RoaringBitmap();
r.add(100001);
r.add(100002);
ByteBuffer buffer = ByteBuffer.allocate(r.serializedSizeInBytes());
r.serialize(buffer);
Base64.Encoder encoder = Base64.getEncoder();
String s = encoder.encodeToString(buffer.array());
System.out.println("----------");
System.out.println(s);
}
}