Hibernate Map映射的index-many-to-many案例

使用Map映射，index部分可以使用组件，也可以使用持久话类，本例使用<index-many-to-many>来实现使用持久话类为map映射定义index

数据库结构：




CREATE TABLE `team4` (


`id` varchar(50) NOT NULL,


`name` varchar(50) default NULL,


PRIMARY KEY (`id`)


) ENGINE=InnoDB DEFAULT CHARSET=gb2312;




CREATE TABLE `member4` (


`id` varchar(50) NOT NULL,


`name` varchar(50) default NULL,


`age` varchar(50) default NULL,


`team` varchar(50) default NULL,


PRIMARY KEY (`id`)


) ENGINE=InnoDB DEFAULT CHARSET=gb2312;




CREATE TABLE `position` (


`id` varchar(50) NOT NULL,


`role` varchar(50) NOT NULL,


`scene` varchar(50) NOT NULL,


`bestchoice` varchar(50) NOT NULL) ENGINE=InnoDB DEFAULT CHARSET=gb2312;


持久话类：


package mapindexmanytomany;




import java.util.HashMap;


import java.util.Map;






public class Team ...{


private String id;


private String name;


private Map members=new HashMap();




public String getId() ...{


return id;


}




public void setId(String id) ...{


this.id = id;


}








public Map getMembers() ...{


return members;


}




public void setMembers(Map members) ...{


this.members = members;


}




public String getName() ...{


return name;


}




public void setName(String name) ...{


this.name = name;


}


}






package mapindexmanytomany;




import java.util.HashMap;


import java.util.Map;


import java.util.Set;






public class Member ...{


private String id;


private String name;


private Position postition;


private Team team;


private String age;




public String getAge() ...{


return age;


}




public void setAge(String age) ...{


this.age = age;


}






public String getName() ...{


return name;


}




public void setName(String name) ...{


this.name = name;


}








public Position getPostition() ...{


return postition;


}




public void setPostition(Position postition) ...{


this.postition = postition;


}




public String getId() ...{


return id;


}




public void setId(String id) ...{


this.id = id;


}




public Team getTeam() ...{


return team;


}




public void setTeam(Team team) ...{


this.team = team;


}










}






package mapindexmanytomany;






public class Position ...{


private String id;


private String role;


private String scene;


private Member bestChoice;




public Member getBestChoice() ...{


return bestChoice;


}




public void setBestChoice(Member bestChoice) ...{


this.bestChoice = bestChoice;


}




public String getRole() ...{


return role;


}




public void setRole(String role) ...{


this.role = role;


}




public String getScene() ...{


return scene;


}




public void setScene(String scene) ...{


this.scene = scene;


}




public String getId() ...{


return id;


}




public void setId(String id) ...{


this.id = id;


}


}



映射文件：
其中 <index-many-to-many class="Position" column="id"></index-many-to-many>定义了，数据表Position的主键id值使用Member表的主键数值




<?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 package="mapindexmanytomany">


<class name="Team" table="team4">


<id name="id" column="id">


<generator class="uuid.hex"></generator>


</id>


<property name="name" column="name"/>


<map name="members" inverse="false" cascade="all">


<key column="team"></key>


<index-many-to-many class="Position" column="id"></index-many-to-many>


<one-to-many class="Member"/>


</map>


</class>


</hibernate-mapping>






<?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 package="mapindexmanytomany">








<class name="Member" table="member4">


<id name="id" column="id">


<generator class="uuid.hex"></generator>


</id>


<property name="name" column="name"/>


<property name="age" column="age"/>


<many-to-one name="team" ></many-to-one>


</class>


</hibernate-mapping>




<?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 package="mapindexmanytomany">








<class name="Position" table="position">


<id name="id" column="id">


<generator class="uuid.hex"></generator>


</id>


<property name="role" column="role"/>


<property name="scene" column="scene"/>


<many-to-one name="bestChoice" column="bestchoice" cascade="save-update"></many-to-one>


</class>


</hibernate-mapping>

测试代码：






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


Configuration cfg=new Configuration();


cfg.configure();


SessionFactory sf=cfg.buildSessionFactory();


Session session=sf.openSession();


Transaction t=session.beginTransaction();




Team team1=new Team();


team1.setName("足球队-01");








Member m1=new Member();


m1.setName("张三");


m1.setAge("11");







Member m2=new Member();


m2.setName("张四");


m2.setAge("22");





Position p1=new Position();


p1.setRole("守门员");


p1.setScene("上半场");


p1.setBestChoice(m1);





Position p2=new Position();


p2.setRole("中后卫");


p2.setScene("下半场");


p2.setBestChoice(m2);





team1.getMembers().put(p1, m1);


team1.getMembers().put(p2, m2);









session.save(p1);


session.save(p2);


session.save(team1);




t.commit();


System.out.println("success");




}

运行结果：
Hibernate: insert into member4 (name, age, team, id) values (?, ?, ?, ?)
Hibernate: insert into position (role, scene, bestchoice, id) values (?, ?, ?, ?)
Hibernate: insert into member4 (name, age, team, id) values (?, ?, ?, ?)
Hibernate: insert into position (role, scene, bestchoice, id) values (?, ?, ?, ?)
Hibernate: insert into team4 (name, id) values (?, ?)
Hibernate: update member4 set team=?, id=? where id=?
Hibernate: update member4 set team=?, id=? where id=?