java 生成uuid

uuid 作为通用识别码，其java的实现版本如下 ，本文以 将url（https://blog.youkuaiyun.com/renyuanfang/article/details/86701148）转换成uuid为例，实现具体的代码实现

import java.util.UUID;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.Charset;
import java.io.IOException;

public class uuid_test {
    public static void main (String[] args) throws IOException{
        final Charset UTF8 = Charset.forName("UTF-8");
        String url = "https://blog.youkuaiyun.com/renyuanfang/article/details/86701148";
        UUID NAMESPACE = UUID.fromString("6ba7b811-9dad-11d1-80b4-00c04fd430c8");
        byte[] input = url.getBytes(UTF8);
        long least = NAMESPACE.getLeastSignificantBits();
        long most = NAMESPACE.getMostSignificantBits();
        byte[] out = new byte[16 + input.length];
        ByteBuffer buffer = ByteBuffer.wrap(out).order(ByteOrder.BIG_ENDIAN);
        buffer.putLong(most);
        buffer.putLong(least);
        buffer.put(input);
        System.out.println(UUID.nameUUIDFromBytes(out).toString());
    }
}

python 的生成版本如下：https://blog.youkuaiyun.com/renyuanfang/article/details/90213667