9

当我使用经典上下文加载在 Eclipse 上运行我的应用程序时，不用担心，在与所选 Spring Profile 对应的配置类上定义的 bean 被正确实例化。

public class BasketHandlerLoader {

    public static void main(String[] args) throws Exception {
        @SuppressWarnings("resource")
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:config/spring/spring-archibald-basket-handler-context.xml");
        context.registerShutdownHook();
    }
}

但是，当我使用 Spring Boot 运行应用程序时，这些 bean 没有被实例化。

@Configuration
@ImportResource("classpath:config/spring/spring-archibald-basket-handler-context.xml")
public class BasketHandlerLoader {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(BasketHandlerLoader.class, args);
    }
}

这是“dev”Spring配置文件的java配置类：

@Configuration
@Profile("dev")
@EnableTransactionManagement
@PropertySources(value = { @PropertySource("classpath:filters/dev.properties") })
public class DevPersistenceConfig extends AbstractPersistenceConfig {

    @Inject
    private Environment env;

    @Override
    @Bean
    public DataSource dataSource() {
        return super.createDataSource(env);
    }

    @Override
    public Properties hibernateProperties() {
        return super.createHibernateProperties(env);
    }
}

这里包含未实例化的其他 bean 的AbstractPersistenceConfig类：

public abstract class AbstractPersistenceConfig {

    // Constants...

    // ************************** ABSTRACT METHODS **************************

    /**
    * Returns a property list containing the Hibernate properties.
    * 
    * @return the Hibernate properties.
    */
    public abstract Properties hibernateProperties();

    /**
    * Defines the application datasource bean corresponding with the current Spring Profile.
    * 
    * @return the application datasource bean corresponding with the current Spring Profile.
    */
    @Bean
    public abstract DataSource dataSource();

    /**
    * Defines the Hibernate session factory bean.
    * 
    * @return the {@code LocalSessionFactoryBean}.
    */
    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(new String[] { HIBERNATE_PACKAGE_TO_SCAN });
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    /**
    * Defines the bean allowing to Hibernate to support the transaction handling mechanism.
    * 
    * @return the {@code HibernateTransactionManager}.
    */
    @Bean
    public HibernateTransactionManager transactionManager() {
        HibernateTransactionManager txManager = new HibernateTransactionManager();
        txManager.setSessionFactory(sessionFactory().getObject());
        return txManager;
    }

    // ************************** PROTECTED METHODS **************************

    // ...

    // ************************** PRIVATE METHODS **************************

    // ...
}

我尝试使用以下命令运行应用程序，结果相同：

java -jar archibald-basket-handler-1.0-SNAPSHOT.jar --spring.profiles.active=dev

java -jar -Dspring.profiles.active=dev archibald-basket-handler-1.0-SNAPSHOT.jar

具体来说，bean“ sessionFactory ”没有被实例化，也不能被注入到我的GenericDaoImpl类中......

堆栈跟踪：

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'basketDaoImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory fr.ina.archibald.dao.impl.GenericDaoImpl.sessionFactory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.inject.Inject()}
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:648)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:909)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:898)
        at fr.ina.archibald.basket.loader.BasketHandlerLoader.main(BasketHandlerLoader.java:30)
        ... 6 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory fr.ina.archibald.dao.impl.GenericDaoImpl.sessionFactory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.inject.Inject()}
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
        ... 21 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.     Dependency annotations: {@javax.inject.Inject()}
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1103)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:963)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
        ... 23 more

我使用没有 Spring Boot 父 POM 的 Spring Boot 1.0.2.RELEASE。我只是在 POM 上定义了这个：

<dependencyManagement>
    <dependency>
        <!-- Import dependency management from Spring Boot -->
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>${org.springframework.boot.version}</version>
        <type>pom</type>
        <scope>import</scope>
    </dependency>
</dependencyManagement>

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <mainClass>${start-class}</mainClass>
    </configuration>
</plugin>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-integration</artifactId>
    <version>${org.springframework.boot.version}</version>
</dependency>

你有什么想法吗？

非常感谢！！

4

2 回答 2

8

@Import我认为您需要@Configuration直接上课或使用@ComponentScan注释。您使用的初始示例ClassPathXmlApplicationContext将起作用，因为 XML 处理发生得较早，并且会在处理它们之前<component-scan>找到您的类。@Configuration

第二个示例SpringApplication已经开始处理您的@Configuration类，并且 XML 是通过@ImportResource. 到这个时候，XML 不可能<component-scan>添加更多@Configuration。

排序答案：试试@ComonentScan你的BasketHandlerLoader课。

于 2014-05-31T00:07:54.623 回答
0

伟大的！！！有用！非常感谢菲尔（为解决方案和解释！）:-)

@Configuration
@ImportResource("classpath:config/spring/spring-archibald-basket-handler-context.xml")
@ComponentScan(basePackages = { "fr.ina.archibald.dao.config.persistence" }, includeFilters = @ComponentScan.Filter(value = Component.class, type = FilterType.ANNOTATION))
public class BasketHandlerLoader {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(BasketHandlerLoader.class, args);
    }
}
于 2014-05-31T00:31:09.390 回答