我是否需要Persistence.xml中的<class>元素?我有一个非常简单的sistance.xml文件:<?xml version="1.0" encoding="UTF-8"?><persistence version="1.0"
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">
<persistence-unit name="eventractor" transaction-type="RESOURCE_LOCAL">
<class>pl.michalmech.eventractor.domain.User</class>
<class>pl.michalmech.eventractor.domain.Address</class>
<class>pl.michalmech.eventractor.domain.City</class>
<class>pl.michalmech.eventractor.domain.Country</class>
<properties>
<property name="hibernate.hbm2ddl.auto" value="validate" />
<property name="hibernate.show_sql" value="true" />
</properties>
</persistence-unit></persistence>而且起作用了。但当我移除<class>元素应用程序看不到实体(所有类都用@Entity).有没有自动扫描机制@Entity上课?
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