java.lang.ClassNotFoundException：无法加载请求的类：org.hibernate.dialect.Oracle12cDialect

Question

我在编译我的应用程序时遇到问题，原因是：

java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: 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]
    Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
    Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Unable to resolve name [org.hibernate.dialect.Oracle12cDialect     ] as strategy [org.hibernate.dialect.Dialect]
    Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [org.hibernate.dialect.Oracle12cDialect     ]
    Caused by: java.lang.ClassNotFoundException: Could not load requested class : org.hibernate.dialect.Oracle12cDialect

但是，jar 在 pom.xml 中：

<dependency>
    <groupId>oracle</groupId>
    <!-- <artifactId>ojdbc7</artifactId> -->
    <!-- <version>12.1.0.1</version> -->
    <artifactId>ojdbc8</artifactId>
    <version>12.2.0.1</version>
</dependency>

Answer 1

您可以在hibernate-core-5.0.11 中找到 hibernate.dialect.Oracle12cDialect。

而不是 OJDBC，升级你的休眠核心依赖，

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>5.0.11.Final</version>
</dependency>

或任何高于 5.0.11 的版本