Spring Boot JPA 多数据源错误
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【中文标题】Spring Boot JPA 多数据源错误【英文标题】：Spring Boot JPA multiple datasource error 【发布时间】：2017-06-12 09:56:19 【问题描述】：我想将我的 spring boot 应用程序连接到 2 个数据库。所以根据教程，我创建了 2 个配置类。
配置类 1
@Configuration
@EnableTransactionManagement
@PropertySource( "classpath:database-configs.properties" )
@EnableJpaRepositories(
basePackages = "com.dialog.pod.ideabiz_admin.data_access_objects",
entityManagerFactoryRef = "adminEntityManagerFactory",
transactionManagerRef = "adminTransactionManager")
public class IdeabizAdminConfig
@Autowired
private Environment env;
@Bean
PlatformTransactionManager adminTransactionManager()
return new JpaTransactionManager(adminEntityManagerFactory().getObject());
@Bean
LocalContainerEntityManagerFactoryBean adminEntityManagerFactory()
HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
// jpaVendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
factoryBean.setDataSource(adminDataSource());
factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
factoryBean.setPackagesToScan("com.dialog.pod.ideabiz_admin.models");
factoryBean.setJpaPropertyMap(jpaProperties());
factoryBean.setPersistenceUnitName("adminDataSource");
return factoryBean;
@Bean
DataSource adminDataSource()
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("admin.jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("admin.jdbc.url"));
dataSource.setUsername(env.getProperty("admin.jdbc.username"));
dataSource.setPassword(env.getProperty("admin.jdbc.password"));
return dataSource;
private Map<String, Object> jpaProperties()
Map<String, Object> props = new HashMap<>();
props.put("hibernate.implicit_naming_strategy","org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl");
props.put("hibernate.physical_naming_strategy","com.dialog.pod.PhysicalNamingStrategyImpl");
return props;
配置类 2
@Configuration
@EnableTransactionManagement
@PropertySource( "classpath:database-configs.properties" )
@EnableJpaRepositories(
basePackages = "com.dialog.pod.ideabiz_log_summary.data_access_objects",
entityManagerFactoryRef = "sumLogEntityManagerFactory",
transactionManagerRef = "sumLogTransactionManager")
public class IdeabizLogSummaryConfig
@Autowired
private Environment env;
@Bean
PlatformTransactionManager sumLogTransactionManager()
return new JpaTransactionManager(sumLogEntityManagerFactory().getObject());
@Bean
LocalContainerEntityManagerFactoryBean sumLogEntityManagerFactory()
HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
// jpaVendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
factoryBean.setDataSource(adminDataSource());
factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
factoryBean.setPackagesToScan("com.dialog.pod.ideabiz_log_summary.models");
factoryBean.setJpaPropertyMap(jpaProperties());
factoryBean.setPersistenceUnitName("sumLogDataSource");
return factoryBean;
@Bean
DataSource adminDataSource()
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("sumlog.jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("sumlog.jdbc.url"));
dataSource.setUsername(env.getProperty("sumlog.jdbc.username"));
dataSource.setPassword(env.getProperty("sumlog.jdbc.password"));
return dataSource;
private Map<String, Object> jpaProperties()
Map<String, Object> props = new HashMap<>();
props.put("hibernate.implicit_naming_strategy","org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl");
props.put("hibernate.physical_naming_strategy","com.dialog.pod.PhysicalNamingStrategyImpl");
return props;
应用类
@SpringBootApplication
@EnableAutoConfiguration (exclude = DataSourceAutoConfiguration.class )
@Configuration
@ComponentScan
public class PodApiApplication
public static void main(String[] args)
SpringApplication.run(PodApiApplication.class, args);
@Bean
public WebMvcConfigurer corsConfigurer()
return new WebMvcConfigurerAdapter()
@Override
public void addCorsMappings(CorsRegistry registry)
registry.addMapping("/").allowedOrigins("*");
;
当我尝试运行应用程序时出现以下错误。
***************************
APPLICATION FAILED TO START
***************************
Description:
Method requestMappingHandlerMapping in org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration required a single bean, but 2 were found:
- adminEntityManagerFactory: defined by method 'adminEntityManagerFactory' in class path resource [com/dialog/pod/ideabiz_admin/IdeabizAdminConfig.class]
- sumLogEntityManagerFactory: defined by method 'sumLogEntityManagerFactory' in class path resource [com/dialog/pod/ideabiz_log_summary/IdeabizLogSummaryConfig.class]
Action:
Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed
Process finished with exit code 1
我将@Primary 放在第一个配置类中（根据另一个教程）。当我在第一个配置类中执行该数据源时。问题是当我这样做时，第一个数据源也适用于所有 jparepositories。
我是 Spring Boot 的新手。我已经尝试解决这个问题超过 5 个小时 :( 。提前感谢您提供的任何帮助。
完整日志
2017-01-27 00:52:39.713 INFO 6704 --- [ main] com.dialog.pod.PodApiApplication : Starting PodApiApplication on DESKTOP-4B89ITN with PID 6704 (started by y2ksh in H:\Spring MVC Workspace\platform-overview-dashboard\PODApi)
2017-01-27 00:52:39.718 INFO 6704 --- [ main] com.dialog.pod.PodApiApplication : No active profile set, falling back to default profiles: default
2017-01-27 00:52:39.938 INFO 6704 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6e171cd7: startup date [Fri Jan 27 00:52:39 IST 2017]; root of context hierarchy
2017-01-27 00:52:41.712 INFO 6704 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'adminDataSource' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=ideabizAdminConfig; factoryMethodName=adminDataSource; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [com/dialog/pod/ideabiz_admin/IdeabizAdminConfig.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=ideabizLogSummaryConfig; factoryMethodName=adminDataSource; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [com/dialog/pod/ideabiz_log_summary/IdeabizLogSummaryConfig.class]]
2017-01-27 00:52:42.804 INFO 6704 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [class org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$3cc0fc3] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2017-01-27 00:52:43.594 INFO 6704 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8081 (http)
2017-01-27 00:52:43.609 INFO 6704 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2017-01-27 00:52:43.609 INFO 6704 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.6
2017-01-27 00:52:43.810 INFO 6704 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-01-27 00:52:43.810 INFO 6704 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 3891 ms
2017-01-27 00:52:44.247 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-01-27 00:52:44.253 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'metricFilter' to: [/*]
2017-01-27 00:52:44.254 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-01-27 00:52:44.254 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-01-27 00:52:44.254 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-01-27 00:52:44.254 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-01-27 00:52:44.255 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'webRequestLoggingFilter' to: [/*]
2017-01-27 00:52:44.255 INFO 6704 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'applicationContextIdFilter' to: [/*]
2017-01-27 00:52:44.367 INFO 6704 --- [ main] o.s.j.d.DriverManagerDataSource : Loaded JDBC driver: com.mysql.jdbc.Driver
2017-01-27 00:52:44.403 INFO 6704 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'adminDataSource'
2017-01-27 00:52:44.435 INFO 6704 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: adminDataSource
...]
2017-01-27 00:52:44.634 INFO 6704 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core 5.0.11.Final
2017-01-27 00:52:44.636 INFO 6704 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2017-01-27 00:52:44.641 INFO 6704 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2017-01-27 00:52:44.725 INFO 6704 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations 5.0.1.Final
2017-01-27 00:52:45.302 INFO 6704 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2017-01-27 00:52:46.178 INFO 6704 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'adminDataSource'
2017-01-27 00:52:46.189 INFO 6704 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'sumLogDataSource'
2017-01-27 00:52:46.190 INFO 6704 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: sumLogDataSource
...]
2017-01-27 00:52:46.228 INFO 6704 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2017-01-27 00:52:46.291 INFO 6704 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'sumLogDataSource'
2017-01-27 00:52:46.695 INFO 6704 --- [ main] o.h.h.i.QueryTranslatorFactoryInitiator : HHH000397: Using ASTQueryTranslatorFactory
2017-01-27 00:52:46.947 INFO 6704 --- [ main] o.h.h.i.QueryTranslatorFactoryInitiator : HHH000397: Using ASTQueryTranslatorFactory
2017-01-27 00:52:47.496 INFO 6704 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6e171cd7: startup date [Fri Jan 27 00:52:39 IST 2017]; root of context hierarchy
2017-01-27 00:52:47.560 WARN 6704 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping]: Factory method 'requestMappingHandlerMapping' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'openEntityManagerInViewInterceptor' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/JpaBaseConfiguration$JpaWebConfiguration$JpaWebMvcConfiguration.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'javax.persistence.EntityManagerFactory' available: expected single matching bean but found 2: adminEntityManagerFactory,sumLogEntityManagerFactory
2017-01-27 00:52:47.562 INFO 6704 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'sumLogDataSource'
2017-01-27 00:52:47.563 INFO 6704 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'adminDataSource'
2017-01-27 00:52:47.566 INFO 6704 --- [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
2017-01-27 00:52:47.586 INFO 6704 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-01-27 00:52:47.592 ERROR 6704 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Method requestMappingHandlerMapping in org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration required a single bean, but 2 were found:
- adminEntityManagerFactory: defined by method 'adminEntityManagerFactory' in class path resource [com/dialog/pod/ideabiz_admin/IdeabizAdminConfig.class]
- sumLogEntityManagerFactory: defined by method 'sumLogEntityManagerFactory' in class path resource [com/dialog/pod/ideabiz_log_summary/IdeabizLogSummaryConfig.class]
Action:
Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed
Process finished with exit code 1
【问题讨论】：
你能用包含@Primary 注释的代码版本更新你的问题吗？ （您将需要使用它。） @gyoder 你的意思是春季启动版本吗？ 1.4 不，具有@Primary 属性的配置类会导致将相同的数据源应用于所有存储库 @gyoder 配置类 1 【参考方案1】：将其中一个 bean 标记为主要
@Primary
@Bean
public EntityManagerFactory entityManagerFactory()
【讨论】：
【参考方案2】：您的 Spring Boot 应用程序通过 @WebMvcAutoConfiguration 隐式激活 Spring Web Mvc，这由在您的类路径中包含 Servlet.class 等触发。这个 @WebMvcAutoConfiguration 需要一个 EntityManagerFactory 类型的 bean。但是，您已经注册了两个这样的 bean adminEntityManagerFactory 和 sumLogEntityManagerFactory。因此，您必须在相应的 @Bean 方法之上通过 @Primary 告诉 Spring Web Mvc 哪个是您的首选。或者，如果您不需要 Web Mvc 自动配置，请通过 @EnableAutoConfiguration(exclude=WebMvcAutoConfiguration) 将其关闭并手动配置 Web Mvc。
【讨论】：
你的解释很好，如果格式好的话会更好。【参考方案3】：找到了解决办法。您需要为配置类中的每个 bean 命名。
新配置 1 类
@Configuration
@EnableTransactionManagement
@PropertySource( "classpath:database-configs.properties" )
@EnableJpaRepositories(
basePackages = "com.dialog.pod.ideabiz_admin.data_access_objects",
entityManagerFactoryRef = "adminEntityManagerFactory",
transactionManagerRef = "adminTransactionManager")
public class IdeabizAdminConfig
@Autowired
private Environment env;
@Bean(name = "adminTransactionManager")
PlatformTransactionManager adminTransactionManager()
return new JpaTransactionManager(adminEntityManagerFactory().getObject());
@Bean(name = "adminEntityManagerFactory")
LocalContainerEntityManagerFactoryBean adminEntityManagerFactory()
HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
// jpaVendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
factoryBean.setDataSource(adminDataSource());
factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
factoryBean.setPackagesToScan("com.dialog.pod.ideabiz_admin.models");
factoryBean.setJpaPropertyMap(jpaProperties());
factoryBean.setPersistenceUnitName("adminDataSource");
return factoryBean;
@Bean(name = "adminDataSource")
DataSource adminDataSource()
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("admin.jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("admin.jdbc.url"));
dataSource.setUsername(env.getProperty("admin.jdbc.username"));
dataSource.setPassword(env.getProperty("admin.jdbc.password"));
return dataSource;
private Map<String, Object> jpaProperties()
Map<String, Object> props = new HashMap<>();
props.put("hibernate.implicit_naming_strategy","org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl");
props.put("hibernate.physical_naming_strategy","com.dialog.pod.PhysicalNamingStrategyImpl");
return props;
新配置 2 类
@Configuration
@EnableTransactionManagement
@PropertySource( "classpath:database-configs.properties" )
@EnableJpaRepositories(
basePackages = "com.dialog.pod.ideabiz_log_summary.data_access_objects",
entityManagerFactoryRef = "sumLogEntityManagerFactory",
transactionManagerRef = "sumLogTransactionManager")
public class IdeabizLogSummaryConfig
@Autowired
private Environment env;
@Primary
@Bean(name = "sumLogTransactionManager")
PlatformTransactionManager sumLogTransactionManager()
return new JpaTransactionManager(sumLogEntityManagerFactory().getObject());
@Primary
@Bean(name = "sumLogEntityManagerFactory")
LocalContainerEntityManagerFactoryBean sumLogEntityManagerFactory()
HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
// jpaVendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
factoryBean.setDataSource(summaryLogDataSource());
factoryBean.setJpaVendorAdapter(jpaVendorAdapter);
factoryBean.setPackagesToScan("com.dialog.pod.ideabiz_log_summary.models");
factoryBean.setJpaPropertyMap(jpaProperties());
factoryBean.setPersistenceUnitName("sumLogDataSource");
return factoryBean;
@Primary
@Bean(name = "summaryLogDataSource")
DataSource summaryLogDataSource()
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("sumlog.jdbc.driverClassName"));
dataSource.setUrl(env.getProperty("sumlog.jdbc.url"));
dataSource.setUsername(env.getProperty("sumlog.jdbc.username"));
dataSource.setPassword(env.getProperty("sumlog.jdbc.password"));
return dataSource;
private Map<String, Object> jpaProperties()
Map<String, Object> props = new HashMap<>();
props.put("hibernate.implicit_naming_strategy","org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl");
props.put("hibernate.physical_naming_strategy","com.dialog.pod.PhysicalNamingStrategyImpl");
return props;
----------------------------------------------- -------------------------------------------------- -------------------------------------------
事实证明，我对两个数据源 bean 使用了相同的方法名称。这就是为什么所有 jparepos 只使用一个数据源的原因。感谢 @Javatar81 解释 bean 命名的工作原理
【讨论】：
名称不应该有所不同，因为 bean 的默认名称由方法名称给出。这次您正确使用了@Primary，这就是它起作用的原因。您能否检查一下它是否在没有定义名称属性的情况下仍然有效？以上是关于Spring Boot JPA 多数据源错误的主要内容，如果未能解决你的问题，请参考以下文章
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