What is the use of RedisSerializer provided by Spring
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By default, RedisTemplate uses JdkSerializationRedisSerializer
That is, JDK serialization, it is easy to create the illusion that garbled codes are saved in Redis.
Usually for readability, you can set the serializer of Key to StringRedisSerializer.
However, the direct use of RedisSerializer.string () is equivalent to using UTF_8-encoded StringRedisSerializer, so you need to pay attention to the character set problem.
If you want Value to also use JSON serialization, you can set the Value serializer to Jackson2JsonRedisSerializer.
You can enable the activateDefaultTyping method of Jackson ObjectMapper to serialize the type information and save it in Value.
By default, type information is not saved in Value
Even if we define the Value generics of RedisTemplate as the actual type, the queried Value can only be of type LinkedHashMap.
If you want to get the real data type directly
If you want Value to be saved in JSON with type information
It's easier to use the RedisSerializer.json () shortcut method directly to get the serializer.
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