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2024-02-09 07:00:00

hibernate. hibernateexception:当'hibernate. info '时，访问DialectResolutionInfo不能为空。方言没有设定

我试图通过spring-jpa运行一个使用hibernate的spring-boot应用程序，但我得到这个错误:

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: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:1885)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1843)
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843)
        at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842)
        at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
        at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336)
        at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1613)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1550)
        ... 21 more

我的pom.xml文件是这样的:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.1.8.RELEASE</version>
</parent>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-web</artifactId>
       </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-taglibs</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
    </dependency>
</dependencies>

我的hibernate配置是这样的(方言配置在该类的最后一个方法中):

@Configuration
@EnableTransactionManagement
@ComponentScan({ "com.spring.app" })
public class HibernateConfig {

   @Bean
   public LocalSessionFactoryBean sessionFactory() {
      LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();

      sessionFactory.setDataSource(restDataSource());
      sessionFactory.setPackagesToScan(new String[] { "com.spring.app.model" });
      sessionFactory.setHibernateProperties(hibernateProperties());

      return sessionFactory;
   }

   @Bean
   public DataSource restDataSource() {
      BasicDataSource dataSource = new BasicDataSource();

      dataSource.setDriverClassName("org.postgresql.Driver");
      dataSource.setUrl("jdbc:postgresql://localhost:5432/teste?charSet=LATIN1");
      dataSource.setUsername("klebermo");
      dataSource.setPassword("123");

      return dataSource;
   }

   @Bean
   @Autowired
   public HibernateTransactionManager transactionManager(SessionFactory sessionFactory) {
      HibernateTransactionManager txManager = new HibernateTransactionManager();
      txManager.setSessionFactory(sessionFactory);
      return txManager;
   }

   @Bean
   public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
      return new PersistenceExceptionTranslationPostProcessor();
   }

   Properties hibernateProperties() {
      return new Properties() {
         /**
         * 
         */
        private static final long serialVersionUID = 1L;

        {
            setProperty("hibernate.hbm2ddl.auto", "create");
            setProperty("hibernate.show_sql", "false");
            setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
         }
      };
   }
}

我哪里做错了?

当前回答

在应用程序中添加spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect。属性文件

2017-05-27 10:01:43

其他回答

确保像OP一样在pom中有数据库。那是我的问题。

2017-02-17 21:10:16

在我的例子中，这个异常的根本原因来自于使用旧版本的mysql连接器，我有这个错误:

无法加载验证插件“caching_sha2_password”。mysql

将这一行添加到mysql服务器配置文件(my.cnf或my.ini)可以修复这个问题:

default_authentication_plugin = mysql_native_password

2020-06-22 14:17:12

我通过添加hibernate.cfg.xml解决了这个问题:

<property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

当然，我在一个非常旧的应用程序上升级了Spring和Hibernate，并没有将其重构为新的标准，因此对大多数人来说，这个解决方案是无关紧要的，因为它只适用于以旧方式配置的应用程序。

2022-09-03 20:20:06

I also faced a similar issue. But, it was due to the invalid password provided. Also, I would like to say your code seems to be old-style code using spring. You already mentioned that you are using spring boot, which means most of the things will be auto configured for you. hibernate dialect will be auto selected based on the DB driver available on the classpath along with valid credentials which can be used to test the connection properly. If there is any issue with the connection you will again face the same error. only 3 properties needed in application.properties

# Replace with your connection string
spring.datasource.url=jdbc:mysql://localhost:3306/pdb1

# Replace with your credentials
spring.datasource.username=root
spring.datasource.password=
2015-11-08 18:56:43

首先删除所有配置，Spring Boot将为您启动它。

确保你有申请。属性，并添加以下属性。

spring.datasource.url=jdbc:postgresql://localhost:5432/teste?charSet=LATIN1
spring.datasource.username=klebermo
spring.datasource.password=123

spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=create

如果您确实需要访问SessionFactory，并且基本上是针对同一个数据源，那么您可以执行以下操作(这里也记录了这一点，但针对的是XML，而不是JavaConfig)。

@Configuration        
public class HibernateConfig {

    @Bean
    public HibernateJpaSessionFactoryBean sessionFactory(EntityManagerFactory emf) {
         HibernateJpaSessionFactoryBean factory = new HibernateJpaSessionFactoryBean();
         factory.setEntityManagerFactory(emf);
         return factory;
    }
}

这样你就有了一个EntityManagerFactory和一个SessionFactory。

更新:从Hibernate 5开始，SessionFactory实际上扩展了EntityManagerFactory。因此，要获得一个SessionFactory，你可以简单地将EntityManagerFactory转换到它或使用unwrap方法来获得一个。

public class SomeHibernateRepository {

  @PersistenceUnit
  private EntityManagerFactory emf;

  protected SessionFactory getSessionFactory() {
    return emf.unwrap(SessionFactory.class);
  }

}

假设您有一个带有@EnableAutoConfiguration的主方法的类，您不需要@EnableTransactionManagement注释，因为它将由Spring Boot为您启用。app包中的一个基本应用程序类就足够了。

@Configuration
@EnableAutoConfiguration
@ComponentScan
public class Application {


    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }

}

这样就足以检测到所有的类(包括实体和基于Spring Data的存储库)。

更新:在SpringBoot的最新版本中，这些注释可以用一个@SpringBootApplication代替。

@SpringBootApplication
public class Application {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }
}

我还建议删除commons-dbcp依赖项，因为这将允许Spring Boot配置更快、更健壮的HikariCP实现。

2014-10-24 13:41:21

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