为什么自动装配Spring仓库不起作用？

Question

I have a controller where I autowire repository:

@Controller
@RequestMapping("/account")
@EnableJpaRepositories
public class AccountController {

    @Autowired
    private AccountRepository accountRepo;

//methods

}

My repository extends CrudRepository

@Repository
public interface AccountRepository extends CrudRepository<Account, Integer> {

    Account findOne(int primaryKey);
}

I use xml to configure my project. Here it is:

<jpa:repositories base-package="com.library.repositories"
        entity-manager-factory-ref="entityManager"></jpa:repositories>

    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManager" />
    </bean>

    <bean id="entityManager"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="com.library.entities" />
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
        </property>
        <property name="jpaProperties">
            <props>
                <!-- <prop key="hibernate.hbm2ddl.auto">create-drop</prop> -->
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
            </props>
        </property>
    </bean>

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/library" />
        <property name="username" value="root" />
        <property name="password" value="root" />
    </bean>

Why it doesn't work? The error I receive is that AccountController cannot autowire bean AccountRepository.

EDIT I've refactored my configuration to annotation based and everything works. In my XML version I probably didn't scan some classes and it resulted with error.

Answer 1

May be you need to have @EnableJpaRepositories annotation on a configuration class with @Configuration annotation instead of Controller class.

Also, make sure your Configuration classes are under a scanned package.