/spring-tutorial

Primary LanguageJava

Spring-Tutorial

说明

通过构造对应单元测试用例辅助阅读Spring源码，加深对Spring源码的理解，并记录过程中遇到的知识点。

Ioc Container

1. 构造函数依赖注入

场景 构造两个类循环依赖的场景，验证：

  1. 通过字段方式注入，正常
  2. 通过构造函数注入，异常

测试用例 org.example.container.ioc.ContainerIocTestTest.testInjectByConstructorAutowired

通过构造函数注入报错信息如下：

WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'beanC': Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'beanD': Unsatisfied dependency expressed through field 'beanC': Error creating bean with name 'beanC': Requested bean is currently in creation: Is there an unresolvable circular reference?