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>