Hibernate集合映射之Map-----element映射基本类

create   table  teamMap (id  varchar ( 32 ),teamname  varchar ( 32 ));
create   table  studentMap (name  varchar ( 32 ),description  varchar ( 32 ), team_id  varchar ( 32 ));

package  Collection.Map.Simple;

import  java.util.HashMap;
import  java.util.Map;

public   class  Team  ... {
    private  String id;
    private  String teamname;
    private  Map students = new  HashMap();
public  String getId()  ... {
     return  id;
}
public   void  setId(String id)  ... {
     this .id  =  id;
}
public  String getTeamname()  ... {
     return  teamname;
}
public   void  setTeamname(String teamname)  ... {
     this .teamname  =  teamname;
}
public  Map getStudents()  ... {
     return  students;
}
public   void  setStudents(Map students)  ... {
     this .students  =  students;
}
}

<? 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 ="Collection.Map.Simple.Team"  table ="teamMap"   >
     < id  name ="id"  unsaved-value ="null" >
       < generator  class ="uuid.hex" ></ generator >
     </ id >
     < property  name ="teamname"  type ="string"  column ="teamname" ></ property >
     < map  name ="students"  table ="studentMap" >
       < key  column ="team_id" ></ key >
       <!--  index代表key,element代表value,一个map标签只能有一个element  -->
       < index  column ="name"  type ="string" ></ index >
       < element  type ="string"  column ="description" ></ element >
     </ map >
</ class >

</ hibernate-mapping >

<? 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 ="Collection/Map/Simple/Team.hbm.xml"   />




</ session-factory >

</ hibernate-configuration >

package  Collection.Map.Simple;


import  java.io.File;
import  java.util.Map;

import  org.hibernate.Session;
import  org.hibernate.SessionFactory;
import  org.hibernate.Transaction;
import  org.hibernate.cfg.Configuration;

public   class  Test  ... {


     public   static   void  main(String[] args)  ... {

        String filePath = System.getProperty( " user.dir " ) + File.separator + " src/Collection/Map/Simple " + File.separator + " hibernate.cfg.xml " ;
        File file = new  File(filePath);
        System.out.println(filePath);
        SessionFactory sessionFactory = new  Configuration().configure(file).buildSessionFactory();
        Session session = sessionFactory.openSession();
        Transaction t = session.beginTransaction();
        
        Team team = new  Team();
        team.setTeamname( " team1 " );
        Map stuMap = team.getStudents();
        stuMap.put( " stu1 " ,  " stu1 description " );
        stuMap.put( " stu2 " ,  " stu2 description " );
        
        session.save(team);
        
        t.commit();
        
    }

}