初用hibernate遇到的CGLIB Enhancement failed有关问题

原作者：http://www.verydemo.com/demo_c146_i15353.html

初用hibernate 遇到的CGLIB Enhancement failed 问题
<?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="Device" table="device" schema="dbo" catalog="nmsDB">
        <id name="id" type="long">
            <column name="device_id" precision="18" scale="0" />
            <generator class="native" />
        </id>
        <property name="mac" type="string">
            <column name="mac" length="255" unique="true"/>
        </property>
        <property name="ip" type="string">
            <column name="ip" length="50" unique="true"/>
        </property>
 &nbs…………………………………………………………………………