Redis：将哈希映射存储在集合中

Question

I'm using Jedis to store some documents on Redis . I have the following class:

public class Document{
      public String id;
      public String title;
      public Map<String, Keyword> keywords = new HashMap<>();
  }

I used sadd to add a set to Redis. I tried the following code:

Document d = new Document();
jedis.sadd(d.id,d.title);

But I don't know how to add the map in the set.

Answer 1

The basic approach, afaik, is to serialize the map before adding it to the set. Note that Redis' sets are made of unique members, where each member is a string value (byte stream in the Java world iirc).