Hibernate关联学习之---多对多关联

create   table  stu(id  varchar ( 32 )  primary   key ,name  varchar ( 32 ),cardid  varchar ( 32 ),age  int );
create   table  course(id  varchar ( 32 )  primary   key ,name  varchar ( 32 ));
create   table  stu_course(stu_id  varchar ( 32 ),course_id  varchar ( 32 ));



insert   into  stu  values (" 1 ","tom"," 200701 ", 11 );
insert   into  stu  values (" 2 ","tomclus"," 200702 ", 11 );
insert   into  stu  values (" 3 ","spark"," 200703 ", 11 );
insert   into  stu  values (" 4 ","jerry"," 200704 ", 11 );

insert   into  course  values (" 1 ","history");
insert   into  course  values (" 2 ","computer");
insert   into  course  values (" 3 ","music");
insert   into  course  values (" 4 ","encomic");
insert   into  course  values (" 5 ","politics");

insert   into  stu_course  values (" 2 "," 1 ");
insert   into  stu_course  values (" 2 "," 2 ");
insert   into  stu_course  values (" 2 "," 3 ");
insert   into  stu_course  values (" 1 "," 3 ");
insert   into  stu_course  values (" 1 "," 4 ");
insert   into  stu_course  values (" 3 "," 2 ");
insert   into  stu_course  values (" 3 "," 3 ");

package  Relation.ManytoMany;

import  java.util.Set;


public   class  Stu  ... {
   private  String id;
   private  String cardid;
   private  String name;
   private   int  age;
   private  Set course;
public  Set getCourse()  ... {
     return  course;
}
public   void  setCourse(Set course)  ... {
     this .course  =  course;
}
public  String getId()  ... {
     return  id;
}
public   void  setId(String id)  ... {
     this .id  =  id;
}
public  String getCardid()  ... {
     return  cardid;
}
public   void  setCardid(String cardid)  ... {
     this .cardid  =  cardid;
}
public  String getName()  ... {
     return  name;
}
public   void  setName(String name)  ... {
     this .name  =  name;
}
public   int  getAge()  ... {
     return  age;
}
public   void  setAge( int  age)  ... {
     this .age  =  age;
}


}



package  Relation.ManytoMany;


import  java.util.HashSet;
import  java.util.Set;

public   class  Course  ... {
    private  String id;
    private  Set students;
    private  String name;
public  String getId()  ... {
     return  id;
}
public   void  setId(String id)  ... {
     this .id  =  id;
}

public  Set getStudents()  ... {
     return  students;
}
public   void  setStudents(Set students)  ... {
     this .students  =  students;
}
public  String getName()  ... {
     return  name;
}
public   void  setName(String name)  ... {
     this .name  =  name;
}



}

<? xml version='1.0' encoding='UTF-8' ?>
<! DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >

<!--  Generated by MyEclipse Hibernate Tools.                    -->
< hibernate-configuration >

< session-factory >
     < property  name ="connection.username" > root </ property >
     < property  name ="connection.url" >
        jdbc:mysql://localhost:3306/schoolproject?characterEncoding=gb2312 &amp; useUnicode=true
     </ property >
     < property  name ="dialect" >
        org.hibernate.dialect.MySQLDialect
     </ property >
     < property  name ="myeclipse.connection.profile" > mysql </ property >
     < property  name ="connection.password" > 1234 </ property >
     < property  name ="connection.driver_class" >
        com.mysql.jdbc.Driver
     </ property >
     < property  name ="hibernate.dialect" >
        org.hibernate.dialect.MySQLDialect
     </ property >
     < property  name ="hibernate.show_sql" > true </ property >
     < property  name ="current_session_context_class" > thread </ property >
     < property  name ="jdbc.batch_size" > 15 </ property >
     < mapping  resource ="Relation/ManytoMany/Course.hbm.xml"   />
     < mapping  resource ="Relation/ManytoMany/Stu.hbm.xml"   />



</ session-factory >

</ hibernate-configuration >

<? 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 - Hibernate Tools
-->
< hibernate-mapping >
< class  name ="Relation.ManytoMany.Stu"  table ="stu" >
   < id  name ="id"  unsaved-value ="null" >
     < generator  class ="uuid.hex" ></ generator >
   </ id >
   < property  name ="cardid"  type ="string" />
   < property  name ="name"  type ="string" />
   < property  name ="age"  type ="int" />
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