How to Serialize Java Objects into JSON and Reverse it using Spring Boot and Redis

Learn how to effectively `serialize Java objects` to JSON format and deserialize them back when using Spring Boot with Redis.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to Serialize Java Object into json and Reverse Json to Object when using springboot with Redis?

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Serialize Java Objects into JSON and Reverse it using Spring Boot and Redis

In the world of web applications, data storage and retrieval can become complex, especially when dealing with different data formats. One common challenge developers face is how to effectively serialize Java objects—turning them into a format suitable for storage, like JSON—and then reverse that process to retrieve the original object. If you're using Spring Boot with Redis for storing your data, this guide will walk you through the process of serializing a Java object (like UserDO) into JSON, storing it in Redis, and then deserializing it back to an object.

Understanding the Use Case

Let's break down the problem you're facing. You have a UserDO Java class that you would like to serialize into JSON to store in Redis. When trying to retrieve it back, instead of getting the original UserDO object, you are receiving a LinkedHashMap. This indicates that while the serialization to JSON is successful, the deserialization back to the Java object isn't working as expected.

Your Java Class

Here’s a simple representation of your UserDO class:

[[See Video to Reveal this Text or Code Snippet]]

Configuration for Redis Serialization

To tackle the problem of object serialization in Redis, you need to appropriately configure your RedisTemplate. Here’s how you can achieve that:

1. Creating the RedisConfig Class

You need to create a configuration class where you define your RedisTemplate bean. Utilize Jackson2JsonRedisSerializer for handling JSON serialization and deserialization.

[[See Video to Reveal this Text or Code Snippet]]

2. Saving and Retrieving the UserDO Object

Now, you can seamlessly save and retrieve your UserDO object using the redisTemplate. Here's how this can be done:

[[See Video to Reveal this Text or Code Snippet]]

Notes on Deserialization Issue

If you were encountering issues with the deserialization (receiving a LinkedHashMap), it's typically due to the RedisTemplate not knowing how to reconstruct the object properly. By specifying the generic type in your RedisTemplate as UserDO, you should be able to retrieve the object directly.

Conclusion

By following the steps outlined above, you can efficiently use Spring Boot with Redis for serializing Java objects to JSON and vice versa. This allows for a smooth data flow in your applications, ensuring that you can easily store and retrieve user data without running into serialization issues.

With the right configuration and understanding, serializing objects in Redis becomes a straightforward task. Don't hesitate to experiment with different configurations and object types as needed. Happy coding!