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This article mainly introduces "how to use Spring boot in java". In daily operation, I believe many people have doubts about how to use Spring boot in java. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "how to use Spring boot in java". Next, please follow the editor to study!

Characteristics of Spring boot

1. Create a stand-alone Spring application

two。 Embedded Tomcat, no need to deploy WAR files

3. Simplify Maven configuration

4. Automatically configure Spring

5. Provide production-ready features such as metrics, health check and external configuration

6. Absolutely no code generation and no configuration required for XML

Advantages of Spring boot

Automation is really convenient, microservices are perfect, and a single jar package is easy to deploy and manage. As long as the system architecture is properly designed, large-scale projects can also be used, coupled with nginx load balancing, easy to achieve scale-out

The problem to be solved by spring boot is to simplify configuration on the one hand, and on the other hand is how to easily integrate the spring ecosystem with other tool chains (such as redis, email, elasticsearch).

The use of Spring boot

1. Maven configuration file

2. Application class

3. Configuration class

4. Add filter

5 、 controller

6 、 service

7. Global exception handling

Description:

@ ControllerAdvice is an auxiliary class of controller, and the most commonly used is the facet class for global exception handling

@ ControllerAdvice can specify the scan range

@ ControllerAdvice specifies several feasible return values. If you return the model class directly, you need to use @ ResponseBody for json conversion.

1. Return String, which means to jump to a view

2. Return modelAndView

3. Return model + @ ResponseBody

8. Add bean used by other configurations

9. Add a data load class

At this point, the study on "how to use Spring boot in java" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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