我正在使用Spring引导框架制作Maven应用程序。我还使用Hibernate ORM技术通过Postgres将对象持久化到数据库中。我遇到的一个问题是Unknown entity: ca.mcgill.ecse321.model.Vehicle
错误,因为Hibernate无法“看到”该类。下面的代码片段显示了我的类层次结构和pom.xml文件。有没有办法让Hibernate查找模型类?
我没有使用hibernate.cfg.xml文件。
Pom.xml
<groupId>com.example</groupId>
<artifactId>RideSharing-backend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>RideSharing</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.3.6.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
答案 0 :(得分:1)
有几件事:
您可以将pom的Hibernate依赖项作为JPA删除,因为默认情况下是Hibernate依赖项。因此,请删除以下内容:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.3.6.Final</version>
</dependency>
如果您在ca.mcgill.ecse321
的根包中包含主类,则@SpringBootApplication
将自动配置您的实体。
如果您的主类不在根包中,则在主类中,然后通过注释扫描实体以放入您的包名:
@EntityScan("ca.mcgill.ecse321.model")
@SpringBootApplication
public class MyApplication {
}