Question

我正在使用Spring MVC 3.1.0M2并试图将我的配置移动到java bean。但我遇到以下错误：

2011-09-14 18：43：42.301：警告：/：不可用org.springframework.beans.factory.BeanCreationException：创建名为'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration＃0'的bean时出错：注入自动连接依赖失败;嵌套异常是org.springframework.beans.factory.BeanCreationException：无法自动装配方法：void org.springframework.transaction.annotation.AbstractTransactionManagementConfiguration.setConfigurers（java.util.Collection）;嵌套异常是org.springframework.beans.factory.BeanCreationException：在类ru.mystamps.web.config.DbConfig中定义名为'entityManagerFactory'的bean时出错：bean的实例化失败;嵌套异常是org.springframework.beans.factory.BeanDefinitionStoreException：工厂方法[public org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean ru.mystamps.web.config.DbConfig.entityManagerFactory（）]引发异常;嵌套异常是java.lang.IllegalArgumentException：DataSource不能为null

从web.xml：

进行映射

<context-param>
    <param-name>spring.profiles.default</param-name>
    <param-value>dev</param-value>
</context-param>

<servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <init-param>
        <param-name>contextClass</param-name>
        <param-value>
            org.springframework.web.context.support.AnnotationConfigWebApplicationContext
        </param-value>
    </init-param>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            ru.mystamps.web.config.MvcConfig,
            ru.mystamps.web.config.DbConfig
        </param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

DbConfig.java：

@Configuration
@EnableTransactionManagement
@ImportResource("classpath:spring/datasource.xml")
public class DbConfig {

    @Autowired
    private DataSource dataSource;

    @Bean
    public JpaVendorAdapter jpaVendorAdapter() {
        final HibernateJpaVendorAdapter jpaVendorAdapter =
            new HibernateJpaVendorAdapter();

        jpaVendorAdapter.setDatabasePlatform(dialectClassName);
        jpaVendorAdapter.setShowSql(showSql);

        return jpaVendorAdapter;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        final LocalContainerEntityManagerFactoryBean entityManagerFactory =
            new LocalContainerEntityManagerFactoryBean();

        entityManagerFactory.setJpaVendorAdapter(jpaVendorAdapter());
        entityManagerFactory.setDataSource(dataSource);

        final Map<String, String> jpaProperties = new HashMap<String, String>();
        jpaProperties.put("hibernate.format_sql", formatSql);
        jpaProperties.put("hibernate.connection.charset", "UTF-8");
        jpaProperties.put("hibernate.hbm2ddl.auto", hbm2ddl);
        entityManagerFactory.setJpaPropertyMap(jpaProperties);

        return entityManagerFactory;
    }

    @Bean
    public PlatformTransactionManager transactionManager() {
        final JpaTransactionManager transactionManager =
            new JpaTransactionManager();

        transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());

        return transactionManager;
    }

    ...
}

spring/datasource.xml：

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.1.xsd
    http://www.springframework.org/schema/jdbc
    http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd">

    <context:property-placeholder location="classpath:spring/database.properties" />

    <beans profile="dev">
        <bean id="dataSource"
            class="org.apache.commons.dbcp.BasicDataSource"
            destroy-method="close">
            <property name="driverClassName" value="${db.driverClassName}" />
            <property name="url" value="${db.url}" />
            <property name="username" value="${db.username}" />
            <property name="password" value="${db.password}" />
        </bean>
    </beans>

    <beans profile="test">
        <jdbc:embedded-database id="dataSource" type="HSQL">
            <jdbc:script location="classpath:test-data.sql" />
        </jdbc:embedded-database>
    </beans>

</beans>

我希望在导入dataSource之后创建bean datasource.xml，但我总是遇到此错误。

TIA

Answer 1

我发现了错误原因，只有在我手动定义PersistenceAnnotationBeanPostProcessor：

时才会发生错误

   @Bean
   public PersistenceAnnotationBeanPostProcessor persistenceAnnotationBeanPostProcessor() {
           // enable injection of EntityManager to beans with @PersistenceContext annotation
           return new PersistenceAnnotationBeanPostProcessor();
   }

我很抱歉因为我没有在问题中发布完整代码（因为我认为这个bean无关紧要）。当我删除此定义时，一切都按预期工作。另外我发现在我的情况下这个bean已经注册了：

注意：默认的PersistenceAnnotationBeanPostProcessor将由。注册 “context：annotation-config”和“context：component-scan”XML标记。如果您打算删除或关闭默认注释配置指定自定义PersistenceAnnotationBeanPostProcessor bean定义。

（引自org.springframework.orm/src/main/java/org/springframework/orm/jpa/support/PersistenceAnnotationBeanPostProcessor.java的评论）

Answer 2

我知道这不能回答实际问题，但为什么不使用注释定义数据源呢？我有一个非常类似的设置使用没有XML，但没有尝试结合这两种方法。

Spring 3.1：DataSource没有自动连接到@Configuration类

2 个答案: