循环依赖只在运行 java -jar 时，而不是 spring-boot:run

Question

一段时间以来，我一直在 Intellij IDEA 中开发一个 spring-boot 应用程序。 现在已经完成，我将把它发送给其他用户。

我使用mvn clean install构建它并尝试使用java -jar target/my-app.jar启动构建的 -jar 文件。

令我惊讶的是它失败了一个例外（难以阅读，但至少被分成几行）

Exception encountered during context initialization - cancelling refresh attempt:
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'userController':
Unsatisfied dependency expressed through field 'userClient';
nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name '***.client.userclient.UserClient':
FactoryBean threw exception on object creation;
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration':
Unsatisfied dependency expressed through method 'setConfigurers' parameter 0;
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'webMvcConfig':
Unsatisfied dependency expressed through field 'authenticationInterceptor';
nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'authenticationInterceptor':
Unsatisfied dependency expressed through field 'authenticationClient';
nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name '***.client.authenticationclient.AuthenticationClient':
FactoryBean threw exception on object creation;
nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException:
Error creating bean with name 'mvcResourceUrlProvider':
Requested bean is currently in creation: Is there an unresolvable circular reference?

我还获得了一些关于依赖项的 ascii 艺术

***************************
APPLICATION FAILED TO START
***************************

Description:

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

|  userController (field ****.client.userclient.UserClient ****.controller.user.UserController.userClient)
↑     ↓
|  ****.client.userclient.UserClient
↑     ↓
|  org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration
↑     ↓
|  webMvcConfig (field ****.AuthenticationInterceptor ****.WebMvcConfig.authenticationInterceptor)
↑     ↓
|  authenticationInterceptor (field ****.client.authenticationclient.AuthenticationClient ****.AuthenticationInterceptor.authenticationClient)
↑     ↓
|  ****.client.authenticationclient.AuthenticationClient
↑     ↓
|  mvcResourceUrlProvider
└─────┘

所以我尝试用mvn spring-boot:run它，它工作正常！

我的印象是使用java -jar和mvn spring-boot:run是一样的。 我错过了什么？

我想我可以修复循环依赖，但现在困扰我的是为什么这两个跑步者不同。

谢谢。

Answer 1

春天有问题，看
https://github.com/spring-projects/spring-boot/issues/6045
https://github.com/spring-projects/spring-framework/issues/18879

临时拐杖解决方案
在 application.properties 或不同的方式设置：
spring.main.lazy-initialization=true

Answer 2

[添加为无法评论的答案]

不确定为什么java -jar和mvn spring-boot:run runners 不同。 添加@Lazy适用于java -jar runner。

一个.java

@Autowired
@Lazy
//setter injection
public void setB(B b) {
    this.b = b;
}

B.java

// constructor injection
@Autowired
public B(A a) {
  this.a = a;
}