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我正在尝试将新 bean 引入现有项目

当前的bean是

package w.x.y.z.pkgA
@Component
public class BeanA implements InterfaceA {

}

我正在尝试将新 Bean 添加到w.x.y.z.pkgB

package w.x.y.z.pkgB
public class BeanB implements InterfaceB {

    @Autowired
    private BeanA beanA

    @PostConstruct
    public void postConstructMethod() {
        //Call some method in BeanA
    }
}

从BeanB我想访问BeanA数据和在BeanB后期构造中我想BeanB注册BeanA. 所以我想调用BeanA方法

所有这些包都打包为jar，spring context xml是

<context:annotation-config />
<context:component-scan base-package="w.x.y.z.pkgA,w.x.y.z.pkgB" />
<bean id="beanb" clas="w.x.y.z.pkgB.BeanB"></bean>

但是在部署过程中，我在创建状态下得到了关于 bean 的异常

Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'context': Requested bean is currently in creation: Is there an unresolvable circular reference?
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.beforeSingletonCreation(DefaultSingletonBeanRegistry.java:347)
at w.x.y.z.BeanA<init>(BeanA.java:25)
at w.x.y.z.BeanB.<init>(BeanB.java:35)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)

我还尝试删除 @Autowired 并BeanA使用getBeanFactory().getBean(BeanA.class). 但我得到同样的错误。

如果我从 xml 文件中删除 bean 条目，它们会被正确部署，但 post 构造永远不会被调用，因为它不再是 bean。

BeanA完全不依赖BeanB。没有参考？

当两个豆子在同一个罐子里时，有没有办法得到这个@Autowired并工作？@PostConstruct

4

1 回答 1

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您将 bean 声明为<bean id="beanb" clas="w.x.y.z.BeanB">来自 wxyz 包。

尝试

package w.x.y.z
@Component
public class BeanA implements InterfaceA {

}



package w.x.y.z
public class BeanB implements InterfaceB {

    private BeanA beanA

    @PostConstruct
    public void postConstructMethod() {
        //Call some method in BeanA
    }

    // Getters and Setters
}

和

<context:annotation-config />
<context:component-scan base-package="w.x.y.z" />
<bean id="beanb" clas="w.x.y.z.BeanB">
    <property name="beanA" value="beanA"/> <!-- Spring will create beanA as it is annotated with @Component -->
</bean>
于 2016-10-25T09:31:36.643 回答