事实证明这很简单：直接在persistence.xml文件中列出这些类。armandino和MikelRascher都使我得到了这个答案，尽管这是间接的，但对他们来说却是支柱。
这是我现在正在使用的persistence.xml：
<?xml version="1.0" encoding="UTF-8"?><persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> <persistence-unit name="crm"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <class>com.example.Language</class> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/> <property name="hibernate.connection.url" value="jdbc:mysql://localhost/crm"/> <property name="hibernate.connection.username" value="myuser"/> <property name="hibernate.connection.password" value="mypass"/> <property name="hibernate.c3p0.min_size" value="5"/> <property name="hibernate.c3p0.max_size" value="20"/> <property name="hibernate.c3p0.idleTestPeriod" value="30"/> <property name="hibernate.c3p0.timeout" value="0"/> <property name="hibernate.c3p0.max_statements" value="0"/> <!--property name="hibernate.show_sql" value="true"/>--> <property name="hibernate.format_sql" value="true"/> <property name="hibernate.query.jpaql_strict_compliance" value="false"/> <property name="hibernate.validator.apply_to_ddl" value="false"/> <property name="hibernate.validator.autoregister_listeners" value="false"/> <property name="hibernate.archive.autodetection" value="class, hbm"/> <property name="hibernate.hbm2ddl.auto" value="create"/> </properties> </persistence-unit></persistence>
