springboot jpa 配置多数据源报错解决 Consider defining a bean named ‘entityManagerFactory‘

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springboot jpa 配置多数据源报错解决 Consider defining a bean named ‘entityManagerFactory‘

版本

springboot 2.6.x

现象

jpa配置多数据源后启动报错

Consider defining a bean named ‘entityManagerFactory’

解决

方法1：将其中一个datasource添加@Primary注解 方法2：自行定义entityManagerFactory

private static JpaVendorAdapter jpaVendorAdapter(JpaProperties properties) { AbstractJpaVendorAdapter adapter = new HibernateJpaVendorAdapter(); adapter.setShowSql(properties.isShowSql()); if (properties.getDatabase() != null) { adapter.setDatabase(properties.getDatabase()); } if (properties.getDatabasePlatform() != null) { adapter.setDatabasePlatform(properties.getDatabasePlatform()); } adapter.setGenerateDdl(properties.isGenerateDdl()); return adapter; } @Bean public EntityManagerFactoryBuilder entityManagerFactoryBuilder( ObjectProvider<PersistenceUnitManager> persistenceUnitManager, ObjectProvider<EntityManagerFactoryBuilderCustomizer> customizers ) { EntityManagerFactoryBuilder builder = new EntityManagerFactoryBuilder( jpaVendorAdapter(jpaProperties()), this.jpaProperties().getProperties(), (PersistenceUnitManager) persistenceUnitManager.getIfAvailable() ); customizers.orderedStream().forEach((customizer) -> { customizer.customize(builder); }); return builder; } 源码分析

springboot jpa自动配置需要存在单一候选DataSource时才会生效 org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration

@Configuration(proxyBeanMethods = false) @EnableConfigurationProperties(HibernateProperties.class) @ConditionalOnSingleCandidate(DataSource.class) class HibernateJpaConfiguration extends JpaBaseConfiguration {...}

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