1. spring boot 集成JPA 报错：
java.lang.NoClassDefFoundError: javax/persistence/EntityManagerFactory
解决方法需要添加：（考虑可能JPA 里的包没有下载或者添加成功）
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
</dependency>
<dependency>
<groupId>jakarta.transaction</groupId>
<artifactId>jakarta.transaction-api</artifactId>
</dependency>
<dependency>
<groupId>jakarta.persistence</groupId>
<artifactId>jakarta.persistence-api</artifactId>
</dependency>
