jwt token spring boot microservices example

So, your system starts to become a little "disobedient". I don’t know when the fight started between services, and permissions were in a mess. Every time I wanted to add a new function, I had to work for a long time - does this scene sound familiar to you?

Many people are looking for ways to manage microservices, especially identity authentication. Using JWT sounds cool, lightweight and stateless, but when it is actually inserted into Spring Boot, problems arise one by one. How to generate Token? How to deliver it safely? How to verify different services? What if the token is stolen? As I thought about it, my head felt a little swollen.

Hey, don't worry, this kind of thing shouldn't be shouldered by one person. We have encountered similar troubles before when we were helping a team working on smart hardware: Their device management service and user service were always at odds with each other over permissions, and both sides had to be changed together every time they were debugged. Not only was it inefficient, but it was also error-prone. Later, they changed their thinking - treating JWT as an internal pass, the rules were unified, and services could finally talk to each other.

In fact, the key is not JWT itself, but how you naturally embed it into the microservice process. For example, the gateway layer can verify tokens uniformly, and the business layer only needs to care about its own logic; or the token refresh mechanism can be made lighter to prevent users from feeling stuck. When these little details add up, the experience is completely different.

You may ask, will this complicate the system? We were worried at first, but after trying it, we found that as long as the structure is clear, it will be more refreshing. Just like building blocks, each piece knows where it should be, and the whole is stable.

Speaking of this, I remembered that I had seen people make each service into a "little castle" and do their own thing. As a result, the data format was not even consistent. In fact, microservices do not mean bulk, it requires a set of gentle rules - JWT here is like the soft-spoken command that everyone listens to.

Of course, we didn’t do so smoothly at the beginning. When I was first trying it out on my own, I often ran into pitfalls: the Token expiration time was set too short, and users kept logging in again; the signature key management was not strict, and security issues almost occurred. Later, I slowly figured out a way to encapsulate these repetitive and error-prone parts into common modules. Which services need to be introduced, and only one change is needed to modify them.

What are the benefits of doing this? The most obvious thing is that developers no longer have to worry about identity verification every day. New services can be accessed quickly, and permissions can be adjusted flexibly. The overall system looks... well, a bit like a tree, with clear branches and free leaves.

If you are also looking for such a kind of "quietness", you might try sorting out permissions and authentication into an independent small context. It will not interfere with the development of the business, but will silently maintain order behind the scenes.

After all, code is written for people to see, and services are also for people to use. When the logic is clear, people will not be tired - this sounds a bit emotional, but it is often these little things that determine whether the team should work overtime at night.

Okay, that ends the story. The world of microservices is quite big, but if you take it step by step, you can always find a way to make it easier for you. Have a great day coding.

Established in 2005,kpowerhas been dedicated to a professional compact motion unit manufacturer, headquartered in Dongguan, Guangdong Province, China. Leveraging innovations in modular drive technology,kpowerintegrates high-performance motors, precision reducers, and multi-protocol control systems to provide efficient and customized smart drive system solutions.kpowerhas delivered professional drive system solutions to over 500 enterprise clients globally with products covering various fields such as Smart Home Systems, Automatic Electronics, Robotics, Precision Agriculture, Drones, and Industrial Automation.