首先，在數(shù)據(jù)庫(kù)中建立表：
CREATE TABLE `container` (
? `containerId` varchar(50) NOT NULL,
? `container_type` varchar(50) NOT NULL,
? `size` double default NULL,
? `name` varchar(50) default NULL,
? `description` varchar(50) default NULL,
? `height` double default NULL,
? `length` double default NULL,
? `width` double default NULL,
? `diameter` double default NULL,
? PRIMARY KEY? (`containerId`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;
?
其中Container是一個(gè)抽象類(lèi)，其下有兩個(gè)子類(lèi)Box和Bottle
?
package
?abstracttest;
public
?
abstract
?
class
?Container?
{
??
private
?String?containerId;
??
private
?
double
?size;
??
private
?String?name;
??
private
?String?description;
public
?String?getContainerId()?
{
????
return
?containerId;
}
public
?
void
?setContainerId(String?containerId)?
{
????
this
.containerId?
=
?containerId;
}
public
?String?getDescription()?
{
????
return
?description;
}
public
?
void
?setDescription(String?description)?
{
????
this
.description?
=
?description;
}
public
?String?getName()?
{
????
return
?name;
}
public
?
void
?setName(String?name)?
{
????
this
.name?
=
?name;
}
public
?
double
?getSize()?
{
????
return
?size;
}
public
?
void
?setSize(
double
?size)?
{
????
this
.size?
=
?size;
}
}
?
package
?abstracttest;
public
?
class
?Bottle?
extends
?Container?
{
??
private
?
double
?diameter;
??
private
?
double
?height;
public
?
double
?getDiameter()?
{
????
return
?diameter;
}
public
?
void
?setDiameter(
double
?diameter)?
{
????
this
.diameter?
=
?diameter;
}
public
?
double
?getHeight()?
{
????
return
?height;
}
public
?
void
?setHeight(
double
?height)?
{
????
this
.height?
=
?height;
}
}
?
package
?abstracttest;
public
?
class
?Box?
extends
?Container?
{
????
private
?
double
?height;
????
private
?
double
?length;
????
private
?
double
?width;
????
public
?
double
?getHeight()?
{
????????
return
?height;
????}
????
public
?
void
?setHeight(
double
?height)?
{
????????
this
.height?
=
?height;
????}
????
public
?
double
?getLength()?
{
????????
return
?length;
????}
????
public
?
void
?setLength(
double
?length)?
{
????????
this
.length?
=
?length;
????}
????
public
?
double
?getWidth()?
{
????????
return
?width;
????}
????
public
?
void
?setWidth(
double
?width)?
{
????????
this
.width?
=
?width;
????}
}
?
在HBM文件中，定義，抽象類(lèi)的配置
?
<?
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
="abstracttest"
>
????
<
class?
name
="Container"
?abstract
="true"
?table
="container"
>
???????
<
id?
name
="containerId"
>
?????????
<
generator?
class
="uuid.hex"
></
generator
>
???????
</
id
>
???????
<
discriminator?
column
="container_type"
></
discriminator
>
???????
<
property?
name
="size"
?column
="size"
></
property
>
???????
<
property?
name
="name"
?column
="name"
></
property
>
???????
<
property?
name
="description"
?column
="description"
></
property
>
???????
<
subclass?
name
="Box"
?discriminator-value
="BOX"
>
?????????
<
property?
name
="height"
?column
="height"
></
property
>
?????????
<
property?
name
="width"
?column
="width"
></
property
>
?????????
<
property?
name
="length"
?column
="length"
></
property
>
???????
</
subclass
>
???????
<
subclass?
name
="Bottle"
?discriminator-value
="BOTTLE"
>
?????????
<
property?
name
="diameter"
?column
="diameter"
></
property
>
?????????
<
property?
name
="height"
?column
="height"
></
property
>
???????
</
subclass
>
????
</
class
>
</
hibernate-mapping
>
?
最后是測(cè)試代碼
package
?abstracttest;
import
?org.hibernate.Session;
import
?org.hibernate.SessionFactory;
import
?org.hibernate.Transaction;
import
?org.hibernate.cfg.Configuration;
public
?
class
?Test?
{
????
/**
?????*?
@param
?args
?????
*/
????
public
?
static
?
void
?main(String[]?args)?
{
????????Configuration?cfg
=
new
?Configuration();
????????cfg.configure();
????????SessionFactory?sf
=
cfg.buildSessionFactory();
????????Session?session
=
sf.openSession();
????????Transaction?t
=
session.beginTransaction();
????????Box?box1
=
new
?Box();
????????box1.setName(
"
木箱子
"
);
????????box1.setHeight(
50
);
????????box1.setLength(
50
);
????????box1.setWidth(
50
);
????????box1.setDescription(
"
包裝電視機(jī)
"
);
????????box1.setSize(
12500
);
????????
????????Bottle?bottle1
=
new
?Bottle();
????????bottle1.setName(
"
玻璃瓶子
"
);
????????bottle1.setDescription(
"
喝牛奶用
"
);
????????bottle1.setSize(
139.12
);
????????bottle1.setDiameter(
6
);
????????bottle1.setHeight(
12
);
????????
????????sessio
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