为什么自动装配Spring仓库不起作用? [英] Why autowiring spring repositories doesn't work?

问题描述

我有一个控制器，可以在其中自动装配存储库:

I have a controller where I autowire repository:

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

    @Autowired
    private AccountRepository accountRepo;

//methods

}

我的存储库扩展了CrudRepository

My repository extends CrudRepository

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

    Account findOne(int primaryKey);
}

我使用xml来配置我的项目.在这里:

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>

为什么不起作用?我收到的错误是AccountController无法自动装配bean AccountRepository.

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

编辑 我已经将配置重构为基于注释的内容，并且一切正常.在我的XML版本中，我可能没有扫描某些类，并且导致错误.

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.

推荐答案

可能是您需要在配置类上使用 @Configuration 注释添加 @EnableJpaRepositories 注释，而不是控制器类.

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

还要确保您的配置类在扫描的软件包下.

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

这篇关于为什么自动装配Spring仓库不起作用?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！