如何使用JPA自动生成非主键的UUID值

<dependency>
    <groupId>javax.persistence</groupId>
    <artifactId>javax.persistence-api</artifactId>
    <version>2.2</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>5.4.31.Final</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-jpamodelgen</artifactId>
    <version>5.4.31.Final</version>
    <scope>provided</scope>
</dependency>

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import org.hibernate.annotations.GenericGenerator;

@Entity
public class MyEntity {
    @Id
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid", strategy = "uuid2")
    private String id;

    // Other fields and methods
    // ...
}

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
    version="2.2">
    <persistence-unit name="myPersistenceUnit">
        <properties>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/mydatabase" />
            <property name="javax.persistence.jdbc.user" value="username" />
            <property name="javax.persistence.jdbc.password" value="password" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
            <!-- Other properties -->
        </properties>
    </persistence-unit>
</persistence>

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

public class Main {
    public static void main(String[] args) {
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("myPersistenceUnit");
        EntityManager em = emf.createEntityManager();
        EntityTransaction tx = em.getTransaction();

        try {
            tx.begin();

            MyEntity entity = new MyEntity();
            // Set other fields
            // ...

            em.persist(entity);

            tx.commit();
        } catch (Exception e) {
            if (tx != null && tx.isActive()) {
                tx.rollback();
            }
        } finally {
            em.close();
            emf.close();
        }
    }
}