Question

我使用的是spring批量版本3.0.2.RELEASE和spring framework版本3.2.12.RELEASE。我正在尝试将一个作业范围的bean注入另一个作业范围的bean。

我的配置如下所示

<bean id="beanA" class="com.trial.BeanA" scope="job" >
    <property name="beanB" ref="beanB" />
</bean>

<bean id="beanB" class="com.trial.BeanB" scope="job"/>

它会抛出一个带有细节的异常：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.beanA' defined in class path resource [trial-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'com.trial.BeanB' for property 'beanB'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.trial.BeanB] for property 'beanB': no matching editors or conversion strategy found
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:529)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
    at org.springframework.beans.factory.support.AbstractBeanFactory$2.getObject(AbstractBeanFactory.java:331)
    at org.springframework.batch.core.scope.JobScope.get(JobScope.java:103)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:327)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191)
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:34)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:184)
    at com.sun.proxy.$Proxy13.getValue(Unknown Source)
    at org.springframework.batch.core.listener.CompositeJobExecutionListener.beforeJob(CompositeJobExecutionListener.java:73)
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:301)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:49)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'com.trial.BeanB' for property 'beanB'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.trial.BeanB] for property 'beanB': no matching editors or conversion strategy found
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:464)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:495)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:489)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1465)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1424)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1160)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    ... 18 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [com.sun.proxy.$Proxy1 implementing com.trial.BeanB,org.springframework.beans.factory.InitializingBean,org.springframework.aop.scope.ScopedObject,java.io.Serializable,org.springframework.aop.framework.AopInfrastructureBean,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [com.trial.BeanB] for property 'beanB': no matching editors or conversion strategy found
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:267)
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:449)
    ... 24 more

即使我尝试将“作业”范围的bean注入“步骤”范围的bean，它也会失败并引发类似的异常。

我该如何解决这个问题？

Answer 1

您正在使用需要接口的Java代理，但您的BeanB未实现BeanA编码的接口。您需要切换到动态子类或让BeanB实现一个接口并让BeanA期望该接口。

Spring Batch - “作业”范围的bean不能注入“作业”或“步骤”范围的bean

1 个答案: