一对多 ，怎么也找不到了。hibernate 怎么用速度

顶

顶

顶

传统的hibernate 可以使用
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="com.tz.pojo.Usermessage" table="usermessage" catalog="test">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="increment" />
</id>
<many-to-one name="userlogin" class="com.tz.pojo.Userlogin" fetch="select">
<column name="userid" not-null="true" />
</many-to-one>
<property name="course" type="java.lang.String">
<column name="course" length="20" not-null="true" />
</property>
<property name="grade" type="java.lang.Integer">
<column name="grade" not-null="true" />
</property>
</class>
</hibernate-mapping>
这种

aaaaaaaa

只用注解