Spring 在启动时检测到循环依赖（circular dependency）

1、异常信息

Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException:  
Error creating bean with name 'asyncUserDetailService':  
Bean with name 'asyncUserDetailService' has been injected into other beans [asyncCompanyService] in its raw version as part of a circular reference,  
but has eventually been wrapped.  
This means that said other beans do not use the final version of the bean.  
This is often the result of over-eager type matching — consider using 'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.

这段异常信息是 Spring 在启动时检测到 循环依赖（circular dependency） 后给出的详细说明。我们来逐句拆解它的含义，并给出具体的解决办法。

2、异常信息逐句解释

（1）BeanCurrentlyInCreationException: Error creating bean with name 'asyncUserDetailService'：
Spring 正在创建 asyncUserDetailService 这个 Bean，但在这个过程中出错了。

（2）Bean with name 'asyncUserDetailService' has been injected into other beans [asyncCompanyService] in its raw version：
asyncUserDetailService被注入到了 asyncCompanyService中，但注入的是它的“原始版本”（未完成初始化），因为此时它还在创建中。

（3）but has eventually been wrapped. This means that said other beans do not use the final version of the bean：
Spring 最终为这个 Bean 生成了代理（wrapped），但注入到其他 Bean 中的却是早期未代理的版本，这可能导致运行时行为不一致。

（4）This is often the result of over-eager type matching
这类问题通常是因为 Spring 在早期就尝试解析依赖，导致注入了未完成初始化的 Bean。

3、解决办法

使用 @Lazy 延迟注入（推荐）

在 AsyncCompanyService 中，对 AsyncUserDetailService 使用 @Lazy 注解，让 Spring 延迟加载它：

@Autowired
@Lazy
private AsyncUserDetailService asyncUserDetailService;