hibernate对应关系配置

一对多配置：
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<hibernate-mapping>       
    
     <class name="com.shareinfo.model.Peruserinfo"       
          table="Peruserinfo">       
     <!--hibernate为我们生成主键id-->       
     <id name="userid" type="long">       
       <generator class="sequence">       
        <param name="sequence">peruserinfo_userid</param>       
      </generator>       
     </id>       
     <property name="username"/>       
     <property name="password"/>     
     <set name="books" lazy="true" inverse="true" cascade="all" >       
        <key column="peruserid"/>   //这个是Book表的外键（book外的一个字段）     
        <one-to-many class="com.shareinfo.model.Bookinfo"/>       
     </set>         
</class>       
    
</hibernate-mapping>   


多对多配置：
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<set     
            name="courses"    
            table="Student_Course_Link"   //中间表     
            lazy="false"    
            inverse="false"    
            cascade="all"    
            sort="unsorted"    
        >     
              <key     
                  column="StudentId"  // Student_Course_Link的StudentId     
              />     
              <many-to-many     
                  class="com.hellking.study.hibernate.Course"    
                  column="CourseId"       
// Student_Course_Link中的CourseId（意思就是用这个CourseId关联Course的主键）     
                  outer-join="auto"    
              />  



多对一的配置：（学生映射表可以这样配置）
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<many-to-one     
            name="classes"    
            class="com.hellking.study.hibernate.Classes"    
            cascade="none"    
            outer-join="auto"    
            update="true"    
            insert="true"    
            column="ClassesId" //当前表的ClassesId        />   


一对一的配置：

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<one-to-one     
            name="address"    
            class="com.hellking.study.hibernate.Address"    
            cascade="none"    
            outer-join="auto"    
           constrained="false"    
        />