org.springframework.beans.factory.NoUniqueBeanDefinitionException：没有“org.apache.ibatis.session.SqlSessionFactory”类型的合格bean答案

【问题标题】：org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.apache.ibatis.session.SqlSessionFactory'org.springframework.beans.factory.NoUniqueBeanDefinitionException：没有“org.apache.ibatis.session.SqlSessionFactory”类型的合格bean
【发布时间】：2019-04-27 04:32:39
【问题描述】：

我知道互联网上有很多相同问题的示例。但我想寻求的是架构层面的帮助。

我有一个简单的 spring 项目，其中我有一个配置类。我正在尝试配置两个数据源 （distDataSource，shipmentDataSource）。对于下面提到的两个数据源（MyBatisDISTDataSource、MyBatisShipmentDataSource），我有两个单独的类。

这两个数据源分别工作正常，但是当我尝试一起执行时，控制台上出现异常。

控制台异常日志

线程“main”中的异常 org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为“distDAOImpl”的 bean 时出错：不满足的依赖关系通过字段“distMapper”表示；嵌套异常是 org.springframework.beans.factory.UnsatisfiedDependencyException：创建文件中定义的名称为“distMapper”的 bean 时出错 [D:\eclipse\ShippingModule\shipment-module-v2\CustEquip-CourierShipmentService-PickupSvc\target\classes\com\shipment\mapper\DistMapper.class]：通过bean属性表示的不满足依赖关系 'sqlSessionFactory';嵌套异常是 org.springframework.beans.factory.NoUniqueBeanDefinitionException: 否 'org.apache.ibatis.session.SqlSessionFactory' 类型的限定 bean 可用：预期单个匹配 bean，但找到 2： distSqlSessionFactory,shipmentSqlSessionFactory 在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) 在 org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 在 org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 在 org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) 在 org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) 在 org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) 在 org.springframework.context.annotation.AnnotationConfigApplicationContext.(AnnotationConfigApplicationContext.java:84) 在 com.telus.shipment.app.starter.SchedulePickup.main(SchedulePickup.java:11) 造成的： org.springframework.beans.factory.UnsatisfiedDependencyException：创建文件中定义的名称为“distMapper”的 bean 时出错 [D:\eclipse\ShippingModule\shipment-module-v2\CustEquip-CourierShipmentService-PickupSvc\target\classes\com\shipment\mapper\DistMapper.class]：通过bean属性表示的不满足依赖关系 'sqlSessionFactory';嵌套异常是 org.springframework.beans.factory.NoUniqueBeanDefinitionException: 否 'org.apache.ibatis.session.SqlSessionFactory' 类型的限定 bean 可用：预期单个匹配 bean，但找到 2： distSqlSessionFactory,shipmentSqlSessionFactory 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1357) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1249) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) 在 org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) 在 org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) 在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) 在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) 在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ... 14 更多原因： org.springframework.beans.factory.NoUniqueBeanDefinitionException: 否 'org.apache.ibatis.session.SqlSessionFactory' 类型的限定 bean 可用：预期单个匹配 bean，但找到 2： distSqlSessionFactory,shipmentSqlSessionFactory 在 org.springframework.beans.factory.config.DependencyDescriptor.resolveNotUnique(DependencyDescriptor.java:173) 在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) 在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1342) ... 25 更多

配置类

@Component
@Configuration
@Profile("local")
public class EnvironmentConfigLocal implements EnvironmentConfig {

    @Autowired @Qualifier("DISTDataSource") private MyBatisDISTDataSource distDataSource;
    @Autowired @Qualifier("ShipmentDataSource") private MyBatisShipmentDataSource shipmentDataSource;

    @PostConstruct
    public void postConstruct() {
        System.out.println("Selected Profile : Local");
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer dataProperties(final Environment environment) {
        final PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
        final YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
        final SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher();
        matcher.addActiveProfiles(environment.getActiveProfiles());
        yaml.setDocumentMatchers(matcher);
        yaml.setResources(new ClassPathResource("application.yaml"));
        propertySourcesPlaceholderConfigurer.setProperties(yaml.getObject());
        return propertySourcesPlaceholderConfigurer;
    }

    @Bean
    public DataSourceTransactionManager distTransactionManager() throws SQLException {
        return new DataSourceTransactionManager(distDataSource);
    }

    @Bean
    public DataSourceTransactionManager shipmentTransactionManager() throws SQLException {
        return new DataSourceTransactionManager(shipmentDataSource);
    }

    @Bean
    @Override
    public SqlSessionFactory distSqlSessionFactory() throws Exception {
        SqlSessionFactoryBean distSessionFactory = new SqlSessionFactoryBean();
        distSessionFactory.setDataSource(distDataSource);
        return distSessionFactory.getObject();
    }

    @Bean
    @Override
    public SqlSessionFactory shipmentSqlSessionFactory() throws Exception {
        SqlSessionFactoryBean shipmentSessionFactory = new SqlSessionFactoryBean();
        shipmentSessionFactory.setDataSource(shipmentDataSource);
        return shipmentSessionFactory.getObject();
    }
}

MyBatisDISTDataSource

@Component
@Qualifier("DISTDataSource")
public class MyBatisDISTDataSource extends PooledDataSource {

    @Value("${dist.db.poolMaximumActiveConnections}") int poolMaximumActiveConnections;
    @Value("${dist.db.poolMaximumIdleConnections}") int poolMaximumIdleConnections;

    public MyBatisDISTDataSource(
            @Value("${dist.db.driver-class}") String driver, 
            @Value("${dist.db.url}") String url,
            @Value("${dist.db.user}") String username, 
            @Value("${dist.db.password}") String password) {
        super(driver, url, username, password);
        System.out.println("DIST DB Attr: \n\t" 
                        +driver+"\n\t"
                        +url+"\n\t"
                        +username+"\n\t"
                        +password+"\n\t");
    }

    @PostConstruct
    private void setDataSourceProperties() {
        this.setPoolMaximumActiveConnections(poolMaximumActiveConnections);
        this.setPoolMaximumIdleConnections(poolMaximumIdleConnections);
    }
}

MyBatisShipmentDataSource

@Component
@Qualifier("ShipmentDataSource")
public class MyBatisShipmentDataSource extends PooledDataSource {

    @Value("${shipment.db.poolMaximumActiveConnections}") int poolMaximumActiveConnections;
    @Value("${shipment.db.poolMaximumIdleConnections}") int poolMaximumIdleConnections;

    public MyBatisShipmentDataSource(
            @Value("${shipment.db.driver-class}") String driver, 
            @Value("${shipment.db.url}") String url,
            @Value("${shipment.db.user}") String username, 
            @Value("${shipment.db.password}") String password) {
        super(driver, url, username, password);
        System.out.println("Shipment DB Attr: \n\t" 
                        +driver+"\n\t"
                        +url+"\n\t"
                        +username+"\n\t"
                        +password+"\n\t");
    }

    @PostConstruct
    private void setDataSourceProperties() {
        this.setPoolMaximumActiveConnections(poolMaximumActiveConnections);
        this.setPoolMaximumIdleConnections(poolMaximumIdleConnections);
    }
}

DistMapper

@Mapper
@Component
public interface DistMapper {
    @Select({"select * "
            + "from CONTACT_ADDRESS CA, ADDRESS A"
            + "where CONTACTING_ID = '10001134' "
            + "and PROVINCE_CD ='ON' "
            + "and STREET_NUMBER = '15'"})
    @Results({@Result(column = "CONTACTING_ID", property = "contactingId", jdbcType = JdbcType.DECIMAL)})
    public List<OutletAddress> findAddressByOutletId();

}

ShipmentMapper

@Mapper
@Component
public interface ShipmentMapper {

    @Select({"select C.CONTACT_ID " 
            + "from SHIPMENT_EVENT_TRACKING SE, SHIPMENT S, CONTACT_ADDR CA, CONTACT C " 
            + "where SE.EVENT_CD = 'PICKUP' " 
            + "and SE.SHIPMENT_ID = s.shipment_id " 
            + "and S.SENDER_ADDR_ID = CA.CONTACT_ADDR_ID " 
            + "and CA.CONTACT_ID = c.contact_id " 
            + "and C.GROUP_CD = 'OT' " 
            + "and SE.EVENT_OCCURRED_IND = 'N' " 
            + "and S.CREATION_TS >= (select CURRENT_TIMESTAMP - interval '30' day from dual)" 
            + "and S.SCHEDULE_PICKUP_IND = 'Y'"})
    @Results({
        @Result(column = "CONTACT_ID", property = "contactId", jdbcType = JdbcType.DECIMAL)})
    public CopyOnWriteArrayList<EligibleShipment> findShipmentsByOutlet();
}

【问题讨论】：

问题出在 DistMapper 中。但是你还没有发布它的代码。
@JBNizet DistMapper，添加了 ShipmentMapper 和包裹结构。
某事，但我不知道是什么，我猜是从 Mapper 注释的映射器接口创建 bean，并且这个东西需要一个 SqlSessionFactory 类型的单个 bean。也许它可以以某种方式自定义，但我不知道您使用的是哪个库。

标签： java spring mybatis sessionfactory spring-mybatis

【解决方案1】：

使用spring-mybatis，您可以一一使用register 映射器，或者使用映射器scanning。

如果您手动注册映射器，请确保将正确的SqlSessionFactory 传递给每个映射器。如果你今年春天不这样做，将尝试自动装配 SqlSessionFactory，因为你有两个，你会得到没有找到单个 bean 的错误。

如果您正在使用扫描映射器，请为其指定参数，以便适当的映射器使用正确的SqlSessionFactory。一种方法是将应该使用不同DataSources 的映射器放置到不同的包中。在这种情况下，您需要像这样创建两个 MapperScannerConfigurer bean（假设映射器位于 com.mycompany.myapp.distMappersPackage 和 com.mycompany.myapp.shipmentMappersPackage 中）：

@Bean
public MapperScannerConfigurer distMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setBasePackage("com.mycompany.myapp.distMappersPackage");
    configurer.setSqlSessionFactoryBeanName("distSqlSessionFactory");
    return configurer;
}

@Bean
public MapperScannerConfigurer shipmentMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setBasePackage("com.mycompany.myapp.shipmentMappersPackage");
    configurer.setSqlSessionFactoryBeanName("shipmentSqlSessionFactory");
    return configurer;
}

或者，您可以创建两个不同的注释并在映射器上使用它们，如下所示：

@DistMapperMarker
public interface DistMapper {
   ...
}

@ShipmentMapperMarker
public interface ShipmentMapper {
   ...
}

在这种情况下，映射器可以在一个包中，但您在 MapperScannerConfigurer 上指定 annotationClass：

@Bean
public MapperScannerConfigurer distMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setAnnotationClass(DistMapperMarker.class);
    configurer.setSqlSessionFactoryBeanName("distSqlSessionFactory");
    return configurer;
}

@Bean
public MapperScannerConfigurer shipmentMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setAnnotationClass(ShipmentMapperMarker.class);
    configurer.setSqlSessionFactoryBeanName("shipmentSqlSessionFactory");
    return configurer;
}

对于 java 基础 spring 配置，您也可以尝试使用 MapperScan 并将参数指定为它的属性。这将要求您将弹簧配置分成至少两个类。我没有使用过这种方法，所以我不确定它是否可以正常工作。

【讨论】：

【解决方案2】：

@Primary 在其中一个 SqlSessionFactory bean 上解决了我的问题。

    @Bean
    @Primary
    @Override
    public SqlSessionFactory sqlSessionFactory2() throws Exception {
        SqlSessionFactoryBean sessionFactory2 = new SqlSessionFactoryBean();
        sessionFactory2.setDataSource(dataSource2);
        return sessionFactory2.getObject();
    }

【讨论】：