Spring 是如何解決循環(huán)依賴的，它支持哪種循環(huán)依賴？

@Component
public class CycleRefA {

    /**
     * A中有B
     */
    @Autowired
    private CycleRefB cycleRefB;

    public void hello(){
        System.out.println("A:hello:"+cycleRefB);
    }
}

@Component
public class CycleRefB {

    /**
     * B中有A
     */
    @Autowired
    private CycleRefA cycleRefA;

    public void hello(){
        System.out.println("B:hello:"+cycleRefA);
    }
}

@Test
public void test1(){
    ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
    CycleRefA cycleRefA = applicationContext.getBean(CycleRefA.class);
    cycleRefA.hello();
    CycleRefB cycleRefB = applicationContext.getBean(CycleRefB.class);
    cycleRefB.hello();
}

@Aspect
public class MyAspect1 {

    /**
     * 增強(qiáng)CycleRefC.hello，主要是為了讓aop幫忙生成CycleRefC的代理
     */
    @Before("execution(* com.example.spring.beans.CycleRefC.hello(..))")
    public void beforeCHello() {
        System.out.println("CycleRefC要開始sayHello了");
    }

    /**
     * 增強(qiáng)CycleRefD.hello，主要是為了讓aop幫忙生成CycleRefD的代理
     */
    @Before("execution(* com.example.spring.beans.CycleRefD.hello(..))")
    public void beforeDHello() {
        System.out.println("CycleRefD要開始sayHello了");
    }
}

@Component
public class CycleRefC {

    @Autowired
    private CycleRefD cycleRefD;

    public void hello() {
        System.out.println("C:hello:" + cycleRefD);
    }
}

@Component
public class CycleRefD {

    @Autowired
    private CycleRefC cycleRefC;

    public void hello() {
        System.out.println("D:hello:" + cycleRefC);
    }
}

@Test
public void test2() {
    ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
    CycleRefC cycleRefA = applicationContext.getBean(CycleRefC.class);
    cycleRefA.hello();
    CycleRefD cycleRefD = applicationContext.getBean(CycleRefD.class);
    cycleRefD.hello();
}

@Component("cycleRefE")
public class CycleRefE {

    @Autowired
    private CycleRefF cycleRefF;

    public void hello() {
        System.out.println("E:hello:" + cycleRefF);
    }
}
@Component("cycleRefF")
public class CycleRefF {

    @Autowired
    private CycleRefE cycleRefE;

    public void hello() {
        System.out.println("F:hello:" + cycleRefE);
    }
}

org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'cycleRefE': Bean with name 'cycleRefE' has been injected into other beans [cycleRefF] 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 'getBeanNamesForType' with the 'allowEagerInit' flag turned off, for example.

  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:631)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524)
  at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
  at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
  at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
  at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944)
  at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
  at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
  at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
  at com.example.spring.SpringTests5.test3(SpringTests5.java:35)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
  at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
  at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
  at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
  at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
  at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
  at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
  at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
  at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
  at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
  at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)