目录springboot启动失败的问题启动springboot报错如下将Hibernate SQL方言整理如下表springboot出现’hibernate.dialect’not set在application.properties内写下这两条
springboot启动失败的问题
springboot版本是1.3.0.M1，连接的mysql版本为8，用spring-boot-starter-data-jpa操做数据库
启动springboot报错如下
2018-02-21 11:25:47.637 WARN 12992 — [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization – cancelling refresh attempt
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘entityManagerFactory’ defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when ‘hibernate.dialect’ not setat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1011)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:802)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:521)at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:678)at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:339)at org.springframework.boot.SpringApplication.run(SpringApplication.java:274)at org.springframework.boot.SpringApplication.run(SpringApplication.java:931)at org.springframework.boot.SpringApplication.run(SpringApplication.java:920)at com.business.backend.BizApplication.main(BizApplication.java:122)Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when ‘hibernate.dialect’ not setat org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:104)at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:71)at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:205)at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60)at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343)at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)… 16 common frames omitted
2018-02-21 11:25:47.647 INFO 12992 — [ main] o.apache.catalina.core.StandardService : Stopping service Tomcat
这一句比较关键：
Access to DialectResolutionInfo cannot be null when ‘hibernate.dialect’ not set
原来是Hibernate SQL方言没有设置导致的，在properties文件中增加下面这行：
spring.jpa.database-platform=org.hibernate.dialect.MySQLDialect
再启动springboot，这次启动成功了；
将Hibernate SQL方言整理如下表
springboot出现’hibernate.dialect’not set
在application.properties内写下这两条
双保险！
spring.jpa.database-platform=org.hibernate.dialect.MySQL5Dialectspring.jpa.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
每天告诉自己我很棒!
