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This article introduces the knowledge of "Spring Boot2.6.0 forbids looping how to quote by default". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Preface

In the following code, the ComponentA class injects the ComponentB class and the ComponentB class injects the ComponentA class, the problem of circular dependency will occur. Before 2.6.0, spring will automatically deal with the problem of circular dependency.

Import org.springframework.stereotype.Service;import javax.annotation.Resource; @ Servicepublic class ComponentA {@ Resource private ComponentB componentB;} import org.springframework.stereotype.Service;import javax.annotation.Resource; @ Servicepublic class ComponentB {@ Resource private ComponentA componentA;}

Now, the 2.6.0 version has disabled circular references between Bean by default. If there is a circular reference, it will start a failure report:

* *

APPLICATION FAILED TO START

* *

Description:

The dependencies of some of the beans in the application context form a cycle:

┌─┐

| | componentA |

↑ ↓

| | componentB |

└─┘

Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

Treatment option 1:

Rectify the business and clean up all Bean with circular references

Treatment option 2: spring: main: allow-circular-references: true treatment option 3: import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication; @ SpringBootApplicationpublic class SpringDemoApplication {public static void main (String [] args) {SpringApplication application = new SpringApplication (SpringDemoApplication.class); application.setAllowCircularReferences (Boolean.TRUE); application.run (args) }} the content of "Spring Boot2.6.0 forbids loops how to reference by default" ends here. Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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