What are redis serialization and various serialization situations?

Basic serialization

The default use of jdk serialization will cause the string to be escaped

In In actual development, when we want to store objects in redis, they must be serialized.

• Of course, if we convert the object into a json string, what is stored is equivalent to a string. Not serializing does not affect normal operation

• However, usually we have to serialize the objects we create.

• If we don’t serialize, store the object

## In actual development, we may use json for conversion, but we don't want to use jdk serialization yet (the default is jdk serialization). At this point we need to use the configuration class.

We create a redisTemplate object to overwrite the original redis template object in the bean container.

Distinguish between various serialization situations

Case 1: The class is not serialized and a javabean object is directly stored. The result is: error

a.

b.

c.

d. No serialization, converted to json Object storage. The console is normal, but the black window has garbled characters

#e. Serialize and convert to json object storage. Black window and garbled code.

Case 2: Class serialization, directly storing a javebean object Result: The console displays normally, but the black window has garbled characters

a.

b.

##c.

Case 3 uses jackon serialization (custom serialization) and the content is output normally.

a.

b.

When case four is used normally, we usually The object is converted into json storage, and a certain java object is not directly stored.

a. We use the same method as above in case 3

b. All objects must be serialized, that is,

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