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Hiberante的對象繼承關系之--TPC每一個具體類一

系統 2438 0

數據庫結構:

?

create ? table ?stuTPC?(id? varchar ( 32 ),name? varchar ( 32 ),cardnum? varchar ( 32 ));
create ? table ?teacherTPC(id? varchar ( 32 ),?name? varchar ( 32 ),salary? double );

Hibernate.cfg.xml

?

<? 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 ="Mapping/TPC/Student.hbm.xml" ? />
????
< mapping? resource ="Mapping/TPC/Teacher.hbm.xml" ? />




</ session-factory >

</ hibernate-configuration >

?Pojo

?

package ?Mapping.TPC;

public ? class ?Person? ... {
??
private ?String?id;
??
private ?String?name;
public ?String?getId()? ... {
????
return ?id;
}

public ? void ?setId(String?id)? ... {
????
this .id? = ?id;
}

public ?String?getName()? ... {
????
return ?name;
}

public ? void ?setName(String?name)? ... {
????
this .name? = ?name;
}

}



package ?Mapping.TPC;

public ? class ?Student? extends ?Person? ... {
??
private ?String?cardnum;

public ?String?getCardnum()? ... {
????
return ?cardnum;
}


public ? void ?setCardnum(String?cardnum)? ... {
????
this .cardnum? = ?cardnum;
}

}



package ?Mapping.TPC;

public ? class ?Teacher? extends ?Person? ... {
???
private ?Double?salary;

public ?Double?getSalary()? ... {
????
return ?salary;
}


public ? void ?setSalary(Double?salary)? ... {
????
this .salary? = ?salary;
}

}

?

Student.hbm.xml

?

<? 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 ="Mapping.TPC.Student" ?table ="stuTPC" ?select-before-update ="true" >
????
< id? name ="id" ?unsaved-value ="null" >
??????
< generator? class ="uuid.hex" ></ generator >
????
</ id >
????
< property? name ="name" ?type ="string" ?column ="name" ></ property >
????
< property? name ="cardnum" ?type ="string" ?column ="cardnum" ></ property >
</ class >

</ hibernate-mapping >

?

Teacher.hbm.xml

?

<? 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 ="Mapping.TPC.Teacher" ?table ="teacherTPC" ?select-before-update ="true" >
????
< id? name ="id" ?unsaved-value ="null" >
??????
< generator? class ="uuid.hex" ></ generator >
????
</ id >
????
< property? name ="name" ?type ="string" ?column ="name" ></ property >
????
< property? name ="salary" ?type ="double" ?column ="salary" ></ property >
</ class >
</ hibernate-mapping >

?

測試代碼:

?

package ?Mapping.TPC;


import ?java.io.File;
import ?java.util.Iterator;

import ?org.hibernate.Query;
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/Mapping/TPC " + 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();
????????Student?stu
= new ?Student();
????????stu.setCardnum(
" 11111 " );
????????stu.setName(
" tom1stu " );
????????
????????Teacher?teacher
= new ?Teacher();
????????teacher.setSalary(
new ?Double( 12345 ));
????????teacher.setName(
" tom1teacher " );
????????session.save(stu);
????????session.save(teacher);
????????
// 用父類查詢,因為沒有Person的mapping文件,所以要用全路徑包名寫HQL
????????Query?query = session.createQuery( " from?Mapping.TPC.Person " );
????????Iterator?iter
= query.list().iterator();
????????
while (iter.hasNext()) ... {
????????????Person?person
= (Person)iter.next();
????????????System.out.println(person.getName());
????????}

????????t.commit();
????????
????}


}

?

結果:

Hibernate: insert into stuTPC (name, cardnum, id) values (?, ?, ?)
Hibernate: insert into teacherTPC (name, salary, id) values (?, ?, ?)
Hibernate: select teacher0_.id as id1_, teacher0_.name as name1_, teacher0_.salary as salary1_ from teacherTPC teacher0_
Hibernate: select student0_.id as id0_, student0_.name as name0_, student0_.cardnum as cardnum0_ from stuTPC student0_
tom1teacher
tom1stu

Hiberante的對象繼承關系之--TPC每一個具體類一張數據表


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