本篇内容介绍了“Spring Boot2.6.0默认禁止循环怎么引用”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
前言
如下代码,ComponentA类注入ComponentB类,ComponentB类注入ComponentA类,就会发生循环依赖的问题,在2.6.0之前,spring会自动处理循环依赖的问题
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; }
现在,2.6.0 这个版本已经默认禁止 Bean 之间的循环引用,如果存在循环引用就会启动失败报错:
***************************
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.
处理方案一:
整改业务,清理掉所有存在循环引用的 Bean
处理方案二:
spring: main: allow-circular-references: true
处理方案三:
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); }}
“Spring Boot2.6.0默认禁止循环怎么引用”的内容就介绍到这里了,感谢大家的阅读。如果想了解更多行业相关的知识可以关注编程网网站,小编将为大家输出更多高质量的实用文章!