spring - 为 @Autowired 字段强制使用 cglib 代理

Question

我有混合堆栈：EJB 和 Spring。对于将 Spring 自动装配到 EJB，我使用 SpringBeanAutowiringInterceptor（不确定这是否会影响我遇到的问题）。

尝试通过以下方式自动装配 bean：

@Scope(proxyMode=ScopedProxyMode.TARGET_CLASS, value="singleton")
@Repository
public class ClassA imlpements IfA {
    ...
}


@Scope(value="singleton")
@Repository
public class ClassB {
    @Autowired
    private ClassA classA;

    ...
}

我得到错误：

Could not autowire field: private ClassA ClassB.classA; nested exception is java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257. Please see server.log for more details.

据我了解，问题在于使用了 JDK 代理（因为 ClassA 实现了接口 IfA），而我需要 cglib 代理。

但我不明白。根据文档，注释：@Scope(proxyMode=ScopedProxyMode.TARGET_CLASS, 应该在这里完成工作。

好吧，我不能选择使用接口（作为字段类型）。

知道如何在此处强制 cglib 代理吗？

编辑：

不确定是否相关，但我正在运行 glassfish 3.1.x。

还有stacktrace（部分，因为我不能在这里公开所有的类名：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classB': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private ClassA ClassB.classA; nested exception is java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257.
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1116)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:912)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:855)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:770)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
    ... 89 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private ClassA ClassB.classA; nested exception is java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257. Please see server.log for more details.
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
    ... 100 more
Caused by: java.lang.IllegalArgumentException: Can not set ClassA field ClassB.classA to com.sun.proxy.$Proxy257
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168)
    at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81)
    at java.lang.reflect.Field.set(Field.java:741)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:510)
    ... 102 more

Answer 1

您不应该对单例使用 aop 范围代理。

在你的 spring 配置文件或类中使用 <aop:aspectj-autoproxy proxy-target-class="true" /> 或 @EnableAspectJAutoProxy(proxyTargetClass=true) 来强制 cglib 代理。