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hash

hash类型，散列，alue是一个无序字典,类似java中的hashmap map<String,map>

  • hset: Creates or modifies the value of a field in a hash. 替代hmset
  • hget: Returns the value of a field in a hash
  • hmset: deprecated hset
  • hmget: Returns the values of list fields in a hash.
  • hgetall: Returns all fields and values in a hash --- java enteryset
  • hkeys: Returns all fields in a hash --- java keys
  • hvals: Returns all values in a hash --- java values.
  • hincrby: Increments the integer value of a field in a hash by a number. Uses 0 as initial value if the field doesn't exist.
  • hsetnx: Sets the value of a field in a hash only when the field doesn't exist.