pom.xml:
<dependencies>
...
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.0.3.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
实体:
@Entity
@Table(name = "person")
public class Person {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int personId;
@Column(name = "first_name")
private String firstName;
}
application.properties
spring.datasource.url=jdbc:mysql://localhost:3306/socialmedia?
allowPublicKeyRetrieval=true&useSSL=false
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.driver.class=com.mysql.cj.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.properties.hibernate.default_schema = socialmedia
spring.jpa.hibernate.ddl-auto = create-drop
spring.jpa.show-sql = true
Hibernate不会自动创建表,我设置了属性和实体类,并且在运行代码后,依存关系仍然为空。没有显示错误消息。
答案 0 :(得分:0)
您的策略是:
def foo2[A, B](as: Seq[A])(f: A => B): Seq[(A, B)] = {
as map as.toSet.par.map((a: A) => a -> (a, f(a))).seq.toMap
}
这意味着Hibernate创建表,并在程序运行后删除表。这就是为什么您看不到任何表格的原因。
您必须使用create(仅创建表)或update(还更改表):
spring.jpa.hibernate.ddl-auto = create-drop
然后,我在pom.xml中看不到JPA入门项目,但是您具有不必要的Hibernate依赖关系。您的pom.xml应该如下所示:
spring.jpa.hibernate.ddl-auto = update
spring-boot-starter-data-jpa将自动配置Hibernate。