启动项目，通过@Autowired注入对象，出现循环依赖，导致项目启动失败，具体报错信息如下：
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘xxxtController‘: Unsatisfied dependency expressed through field ‘xxxService‘; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name ‘xxxService‘: Bean with name ‘xxxService‘ has been injected into other beans [xxxServiceA,xxxServiceB] 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
Bean with name ‘xxxService‘ has been injected into other beans [xxxServiceA,xxxServiceB] in its raw version as part of a circular reference, but has eventually been wrapped
翻译：xxxService 这个bean已经被注入到xxxServiceA、xxxServiceB这两个bean中了，他们之间存在循环引用（依赖），也就是说：xxxServiceA中注入了xxxService，而xxxService中也要注入xxxServiceA，所以就会出现这种情况
参考：https://www.cnblogs.com/leng39/p/9530569.html