休眠和Guice,无需持久性。xml

理论上你可以实现你自己的 javax.persistence.spi.PersistenceUnitInfo 变成一个 MyPunit 然后做一些类似的事情

import java.util.ServiceLoader;
import javax.persistence.spi.PersistenceProvider;

...

PersistenceProvider pp = ServiceLoader.load(PersistenceProvider.class).iterator().next();
MyPunit conf = new MyPunit();
Map properties = new HashMap();
EntityManagerFactory emf = pp.createContainerEntityManagerFactory(conf, properties);

然而,应该没有必要这样做。你应该创建自己的持久性。应用程序的xml。你为什么要避免它?

这是最小的持久性。所需的xml,无需列出所有类(使用示例方言):

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" 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_1.xsd">
  <persistence-unit name="package.root.to.scan" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <non-jta-data-source>java:comp/env/jdbc/ourdb</non-jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQL95Dialect"/>
    </properties>
  </persistence-unit>
</persistence>