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hibernate多对多映射配置中的问题

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悬赏园豆:30 [已关闭问题] 关闭于 2017-04-02 12:58

 以下是两个hibernate映射文件:

Activity:

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<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE hibernate-mapping PUBLIC   
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping package="com.ywt.domain">  
    <class name="Activity" table="activity" lazy="true">  
        <!-- id元素定义持久化类的标识属性 -->  
        <id name="id">
            <!-- 指定主键生成策略 -->  
            <generator class="native" />  
        </id>  
        <!-- property元素定义常规属性 -->  
        <property name="name" not-null="true"/>  
        <property name="time" not-null="true"/>  
        <property name="imageurl" not-null="true"/>  
        <property name="hostone" not-null="true"/>  
        <property name="hosttwo" not-null="true"/>  
        <property name="introduce" not-null="true"/>  
        <property name="problem" />  
        <property name="award" />  
        <property name="schedule" />  
        <property name="number" />  
        <property name="status" not-null="true"/>  
        <set name="studentSet" table="activity_student" inverse="true">
            <key>
                <column name="A_ID"></column>
            </key>
            <many-to-many class="Student" column="S_ID" ></many-to-many>
        </set 
    </class>  
</hibernate-mapping>

Student:

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<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE hibernate-mapping PUBLIC   
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping package="com.ywt.domain">  
    <class name="Student" table="student" lazy="true">  
        <!-- id元素定义持久化类的标识属性 -->  
        <id name="id">
            <!-- 指定主键生成策略 -->  
            <generator class="native" />  
        </id>  
        <!-- property元素定义常规属性 -->  
        <property name="username" not-null="true"/>  
        <property name="password" not-null="true"/>  
        <property name="name" not-null="true"/>  
        <property name="sex" not-null="true"/>  
        <property name="major" not-null="true"/>  
        <property name="academy" not-null="true"/>  
        <property name="tel" />  
        <property name="coin"/>  
        <property name="activities" />  
        <property name="honor" /> 
        <set name="activitySet" table="activity_student">
            <key>
                <column name="S_ID"></column>
            </key>
            <many-to-many class="Activity" column="A_ID"></many-to-many>
        </set>  
    </class>  
</hibernate-mapping>

所出现的问题是:只要Activity映射文件中一加set集合就报如下错误(Student映射文件中加set不报错,已确认各属性书写没错误):

严重: Servlet.service() for servlet [mvc] in context with path [/dxshdw] threw exception [Handler processing failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.ywt.util.HibernateUtil] with root cause

java.lang.NoClassDefFoundError: Could not initialize class com.ywt.util.HibernateUtil

其中HibernateUtil是获取session工厂的类

lzj123的主页 lzj123 | 初学一级 | 园豆:158
提问于:2017-04-01 20:31
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lzj123 | 园豆:158 (初学一级) | 2017-04-02 12:58
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