spring循环依赖问题

spring循环依赖问题：
循环依赖是针对成员变量—单例才可以解决setter方法循环依赖，多例是无法解决循环依赖的
- 构造器方法依赖—无法解决
- setter方法依赖—可以解决
循环调用针对方法是无法解决的。

@Component
public class CommonService {

    public CommonService(UserAService userAService) {
        this.userAService = userAService;
    }

    private UserAService userAService;

    public void test() {
        System.out.println("test");
    }
}


@Component
public class UserAService {

    public UserAService(CommonService commonService) {
        this.commonService = commonService;
    }

    private CommonService commonService;

    private void test() {
        commonService.test();
    }
}

Description:

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

┌─────┐
|  commonService defined in file [/Users/xuleyan/code/final-gateway/finals-web/target/classes/com/xuleyan/finals/web/Service/CommonService.class]
↑     ↓
|  userAService defined in file [/Users/xuleyan/code/final-gateway/finals-web/target/classes/com/xuleyan/finals/web/Service/UserAService.class]
└─────┘


如果给CommonService和UserService标记上@Scope("prototype"),会出现以下问题：【表明多例也是无法解决循环依赖的】
Description:

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

   testXController
┌─────┐
|  userAService
↑     ↓
|  commonService
└─────┘