Java 如何完全禁用Spring引导数据库相关配置

我有一个Spring引导服务，它必须根据配置使用或不使用数据库。当属性为

false

时，我想禁用与数据库相关的配置

这是我的

@配置

类：

@Configuration
@EnableScheduling
@Import({WithDatabase.class, WithoutDatabase.class})
public class ServiceConfig {

    private static final String MANAGEMENT_ENABLED_PROPERTY = "database.enabled";

    @ConditionalOnProperty(name = MANAGEMENT_ENABLED_PROPERTY, havingValue = "false", matchIfMissing = true)
    @EnableAutoConfiguration(exclude = {JpaRepositoriesAutoConfiguration.class, HibernateJpaAutoConfiguration.class,
        DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class})
    static class WithoutDatabase {

    }

    @ConditionalOnProperty(name = MANAGEMENT_ENABLED_PROPERTY, havingValue = "true")
    @EnableAutoConfiguration
    @EnableJpaRepositories(basePackages = {"com.base.cm.categories.repository"})
    @EntityScan(basePackages = {"com.base.cm.categories.repository.entity"})
    @EnableJpaAuditing
    static class WithDatabase {

    }
}

这是

应用程序。yml

：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/database
    username: root
    password: root
  jpa:
    generate-ddl: false
    show-sql: true

当MySql服务器启动并运行时，此代码在

true

和

false

配置中都能正常工作。我的意思是，我可以启用或禁用数据库工作，但当我停止MySql服务器时，会出现以下异常：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:312)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)
    at com.base.cm.Application.main(Application.java:23)
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)
    at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)
    at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:179)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:119)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:904)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:935)
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58)
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378)
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1837)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774)
    ... 16 common frames omitted
Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
    at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:100)
    at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:54)
    at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137)
    at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)
    at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263)
    ... 33 common frames omitted

org.springframework.beans.factory.BeanCreationException:创建名为“entityManagerFactory”的bean时出错，该bean在类路径资源[org/springframework/boot/autoconfigure/orm/jpa/hibernatejpacConfiguration.class]中定义：调用init方法失败；嵌套异常为org.hibernate.service.spi.ServiceException:无法创建请求的服务[org.hibernate.engine.jdbc.env.spi.jdbc环境]
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1778）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:593）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:515）
位于org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0（AbstractBeanFactory.java:320）
位于org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:222）
位于org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:318）
位于org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:199）
位于org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplicationContext.java:1105）
位于org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:867）
位于org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:549）
位于org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh（ServletWebServerApplicationContext.java:141）
位于org.springframework.boot.SpringApplication.refresh（SpringApplication.java:744）
位于org.springframework.boot.SpringApplication.refreshContext（SpringApplication.java:391）
位于org.springframework.boot.SpringApplication.run（SpringApplication.java:312）
位于org.springframework.boot.SpringApplication.run（SpringApplication.java:1215）
位于org.springframework.boot.SpringApplication.run（SpringApplication.java:1204）
位于com.base.cm.Application.main（Application.java:23）
原因：org.hibernate.service.spi.ServiceException:无法创建请求的服务[org.hibernate.engine.jdbc.env.spi.jdbc环境]
位于org.hibernate.service.internal.AbstractServiceRegistryImpl.createService（AbstractServiceRegistryImpl.java:275）
位于org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService（AbstractServiceRegistryImpl.java:237）
位于org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:214）
位于org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices（DefaultIdentifierGeneratorFactory.java:152）
位于org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies（AbstractServiceRegistryImpl.java:286）
位于org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService（AbstractServiceRegistryImpl.java:243）
位于org.hibernate.service.internal.AbstractServiceRegistryImpl.getService（AbstractServiceRegistryImpl.java:214）
位于org.hibernate.boot.internal.InFlightMetadataCollectorImpl。（InFlightMetadataCollectorImpl.java:179）
位于org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete（MetadataBuildingProcess.java:119）
位于org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata（EntityManagerFactoryBuilderImpl.java:904）
位于org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build（EntityManagerFactoryBuilderImpl.java:935）
位于org.springframework.orm.jpa.vendor.springhibernatejbapersistenceprovider.createContainerEntityManager工厂（springhibernatejbapersistenceprovider.java:58）
位于org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:365）
位于org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory（AbstractEntityManagerFactoryBean.java:391）
位于org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.AfterPropertieSet（AbstractEntityManagerFactoryBean.java:378）
位于org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.AfterPropertieSet（LocalContainerEntityManagerFactoryBean.java:341）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1837）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1774）
... 省略16个公共帧
原因：org.hibernate.HibernateException:未设置“hibernate.dialogue”时，对方言解析信息的访问不能为空
位于org.hibernate.engine.jdbc.dialogue.internal.dialoguefactorympl.determineDialect（dialoguefactorympl.java:100）
位于org.hibernate.engine.jdbc.dialogue.internal.dialogueFactoryImpl.buildDialogue（dialogueFactoryImpl.java:54）
位于org.hibernate.engine.jdbc.env.internal.jdbconvironmentinitiator.initiateService（jdbconvironmentinitiator.java:137）
在org.hibernate.engine.jdbc.env.internal.jdbc环境启动器.initiateServi
<optional>true</optional>

   <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
       <version>5.2.3.Final</version>
       <optional>true</optional>
    </dependency>