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。
配置类别 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;
}
}
配置类别 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("*");
}
};
}
}
当我尝试运行该应用程序时，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 放入第一个配置类（根据另一个教程）。当我在第一个配置类中执行该数据源时，该数据源有效。问题是当我执行此操作时，第一个数据源也应用于所有 jparepositories。
我是 Spring Boot 新手。我已经尝试解决这个问题超过 5 个小时了:(。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
将其中一颗豆标记为主要豆
@Primary
@Bean
public EntityManagerFactory entityManagerFactory() {
}
您的 Spring Boot 应用程序通过
WebMvcAutoConfigurationServlet.classWebMvcAutoConfigurationEntityManagerFactoryadminEntityManagerFactorysumLogEntityManagerFactory@Primary@Bean@EnableAutoConfiguration(exclude={WebMvcAutoConfiguration})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 命名是如何工作的