从另一个模块中使用Bean

Question

我正在创建一个批处理应用程序，以将来自Web服务的一些数据放到数据库中。 要做到这一点，我需要转换可用类的Web服务接收的DTO。这可以使用其他模块中定义的一些映射器。

当我试图@Autowierd映射器我有一个例外，我不觉得怎么传出来的。

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jobConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.execution.batch.processor.UtilisateurProcessor com.execution.batch.jobConfiguration.JobConfigurationAbstract.utilisateurProcessor; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'utilisateurProcessor': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.execution.server.common.mapper.UtilisateurMapper com.execution.batch.processor.UtilisateurProcessor.utilisateurMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.execution.server.common.mapper.UtilisateurMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
**Caused by**: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.execution.batch.processor.UtilisateurProcessor com.execution.batch.jobConfiguration.JobConfigurationAbstract.utilisateurProcessor; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'utilisateurProcessor': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.execution.server.common.mapper.UtilisateurMapper com.execution.batch.processor.UtilisateurProcessor.utilisateurMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.execution.server.common.mapper.UtilisateurMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
**Caused by**: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'utilisateurProcessor': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.execution.server.common.mapper.UtilisateurMapper com.execution.batch.processor.UtilisateurProcessor.utilisateurMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.execution.server.common.mapper.UtilisateurMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
**Caused by**: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.execution.server.common.mapper.UtilisateurMapper com.execution.batch.processor.UtilisateurProcessor.utilisateurMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.execution.server.common.mapper.UtilisateurMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
**Caused by**: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.execution.server.common.mapper.UtilisateurMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 

映射器在其模块中正常工作。我可以@Autowierdd他们并没有问题地使用它。如果我不@Autowierd映射器，我的批处理工作正常。

有人有想法吗？

谢谢！

编辑

我的配置是对我的工作配置类：

@Configuration 
@EnableBatchProcessing 
@ComponentScan(basePackages = {"com.execution.batch"}) 

我试图把：@ComponentScan(basePackages = {"com.execution.batch", "com.execution.serve"})

但如果我这样做，我有报的注射错误作业的豆：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jobConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.batch.core.configuration.annotation.StepBuilderFactory com.execution.batch.jobConfiguration.JobConfigurationAbstract.stepBuilderFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stepBuilders' defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.configuration.annotation.StepBuilderFactory]: Factory method 'stepBuilders' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jobRepository' defined in com.execution.batch.jobConfiguration.JobConfiguration: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager]: : No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} 
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.batch.core.configuration.annotation.StepBuilderFactory com.execution.batch.jobConfiguration.JobConfigurationAbstract.stepBuilderFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stepBuilders' defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.configuration.annotation.StepBuilderFactory]: Factory method 'stepBuilders' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jobRepository' defined in com.execution.batch.jobConfiguration.JobConfiguration: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager]: : No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stepBuilders' defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.core.configuration.annotation.StepBuilderFactory]: Factory method 'stepBuilders' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jobRepository' defined in com.execution.batch.jobConfiguration.JobConfiguration: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager]: : No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} 
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jobRepository' defined in com.execution.batch.jobConfiguration.JobConfiguration: Unsatisfied dependency expressed through constructor argument with index 0 of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager]: : No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} 
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.batch.support.transaction.ResourcelessTransactionManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} 

就像我说的，单独模块工作正常。

• 当我扫描服务器和批处理模块批次的扫描不起作用。
• 当我只扫描批处理模块时，服务器模块不工作，因为我认为没有扫描。

Answer 1

我想你已经忘记用你想要的类的适当的包来设置“扫描仪”。

你的bean是utilisateurProcessor，FQN是com.execution.batch.processor.UtilisateurProcessor。它是配置为@Component还是XML？

，请复制粘贴的春天”的配置，看看你是否已经添加com.execution.server.common.mapper Spring的扫描仪。

Answer 2

由于您的配置是独立工作的，所以在两个软件包中存在名称冲突的很好的变化。这可能导致配置或bean被覆盖。

E.g.

package com.x; 
@Configuration 
public class AConfiguration { 
} 

package com.y; 
@Configuration 
public class AConfiguration { 
} 

作为springcontext中的beanname，仅使用没有包的类名。所以，如果你扫描这两个软件包，实际上只处理一个配置类。对于使用@Component注解的类也是如此。

明白，那@Component和@Configuration类也实例如豆类，用简单的类名作为beanname是很重要的。

还有@Bean annoted方法是潜在的错误来源。如果在两个不同的Configuration-Beans中有相同的方法名，则只有一个将被实例化。另外，如果使用@Bean methodname与@Configuration类名称具有相同的名称，那么另一个名称将被另一个名称覆盖。