Spring+Redis uses Hash

1. Overview

Redis's Hash is a string-type field and value mapping table, which is especially suitable for storing objects. Let's take a look at the usage scenarios of this data type and how to use it in Spring.

2. Usage scenarios

We know that Hash stores a mapping table of fields and values, so it is more suitable for storing objects, so we can use the data type of Hash to store user information.

@Test
public void testHash(){
   HashOperations hashOperations = redisTemplate.opsForHash();
   hashOperations.put("user","firstName","zhang");
   hashOperations.put("user","lastName","san");
   hashOperations.put("user","age",12);

   System.out.println(hashOperations.values("user"));
}

The output is:

[zhang, 12, san]

3. Summary

From the above output we can see that the Hash data structure is indeed more suitable for storing objects.