你把测试代码忒出来

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate22/Hibernate22 Mapping DTD 3.0//EN"

"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<!-- 

    Mapping file autogenerated by MyEclipse Persistence Tools

-->

<hibernate-mapping>

    <class name="com.etc.entity.Grade" table="grade">

        <id name="gid" type="int">

            <column name="gid" />

            <generator class="native"></generator>

        </id>

        <property name="gname" type="java.lang.String">

            <column name="gname" />

        </property>

        <property name="gdesc" type="java.lang.String">

            <column name="gdesc" />

        </property>

        <set name="students" table="student" inverse="true">

        <key column="gid"></key>

        <one-to-many class="com.etc.entity.Student"/>

        </set>

    </class>

</hibernate-mapping>

我也是还有update

你要把代码贴出来，才知道