Hibernate 学习笔记(二)-- 实体映射

准备:建表

用MySQL在名为STMS数据库中建表persons



src/org.lxh.hibernate.Contact.java

1



package
org.lxh.hibernate;

2



3





/** */
/**

4



*
@author
∪∩BUG E-mail: tidelgl@163.com

5



*
@version
Aug 30, 2008 8:02:48 PM

6



*/

7





public

class
Contact



{

8



9



private
String address;

10



private
String zipcode;

11



private
String tel;

12



13





public
String getAddress()



{

14



return
address;

15



}

16



17





public

void
setAddress(String address)



{

18



this
.address
=
address;

19



}

20



21





public
String getZipcode()



{

22



return
zipcode;

23



}

24



25





public

void
setZipcode(String zipcode)



{

26



this
.zipcode
=
zipcode;

27



}

28



29





public
String getTel()



{

30



return
tel;

31



}

32



33





public

void
setTel(String tel)



{

34



this
.tel
=
tel;

35



}

36



37



}

38



src/org.lxh.hibernate.Name.java

1



package
org.lxh.hibernate;

2



3





/** */
/**

4



*
@author
∪∩BUG E-mail: tidelgl@163.com

5



*
@version
Aug 30, 2008 7:59:53 PM

6



*/

7





public

class
Name



{

8



9



private
String firstname;

10



private
String lastname;

11



12





public
String getFirstname()



{

13



return
firstname;

14



}

15



16





public

void
setFirstname(String firstname)



{

17



this
.firstname
=
firstname;

18



}

19



20





public
String getLastname()



{

21



return
lastname;

22



}

23



24





public

void
setLastname(String lastname)



{

25



this
.lastname
=
lastname;

26



}

27



28



}

29



src/org.lxh.hibernate.Persons.java

1



package
org.lxh.hibernate;

2





/** */
/**

3



*
@author
∪∩BUG E-mail: tidelgl@163.com

4



*
@version
Aug 30, 2008 8:04:57 PM

5



* @本类包含Nane类和Contact类

6



*/

7





public

class
Persons



{

8



private

int
id;

9



private
Name name;

10



private
Contact contact;

11



12





public

int
getId()



{

13



return
id;

14



}

15



16





public

void
setId(
int
id)



{

17



this
.id
=
id;

18



}

19



20





public
Name getName()



{

21



return
name;

22



}

23



24





public

void
setName(Name name)



{

25



this
.name
=
name;

26



}

27



28





public
Contact getContact()



{

29



return
contact;

30



}

31



32





public

void
setContact(Contact contact)



{

33



this
.contact
=
contact;

34



}

35



36



}

37



src/org.lxh.hibernate.PersonsOperate.java

1



package
org.lxh.hibernate;

2



3



import
java.util.List;

4



5



import
org.hibernate.Query;

6



import
org.hibernate.Session;

7



import
org.hibernate.SessionFactory;

8



import
org.hibernate.cfg.Configuration;

9



10





/** */
/**

11



*
@author
∪∩BUG E-mail: tidelgl@163.com

12



*
@version
Aug 30, 2008 8:55:43 PM @ 具
体操作Hibernate的类

13



*/

14





public

class
PersonsOperate



{

15



//
在
Hibernate中所有的操作都是通过Session来完成

16



private
Session session;

17



18



//
Session 是
一个接口,必须实例化

19



//
在构造方法中实例实
化Session对象

20





public
PersonsOperate()



{

21



//
找到
Hibernae配置文件

22



Configuration config
=

new
Configuration().configure();

23



24



//
从全局文件
中取出SessionFactory

25



SessionFactory factory
=
config.buildSessionFactory();

26



27



//
从
sessionFactory中取出一个session

28



this
.session
=
factory.openSession();

29



}

30



31



//
所有的操作都是通过
Session进行

32



//
(1)增加操作

33





public

void
insert(Persons p)



{

34



//
将数据存放
到数据库中

35



this
.session.save(p);

36



37



//
事务提交

38



this
.session.beginTransaction().commit();

39



}

40



41



//
通过HQL查询全部
数据

42





public
List queryAll()



{

43



String hql
=

"
FROM Persons as p
"
;

44



Query q
=

this
.session.createQuery(hql);

45



List l
=
q.list();

46



return
l;

47



}

48



}

49



src/org.lxh.hibernate.Persons.hbm.xml

1



xml version="1.0" encoding="utf-8"
?>

2



DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

3



"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"
>

4



7



<
hibernate-mapping
>

8



<
class
name
="org.lxh.hibernate.Persons"
table
="persons"

9



catalog
="stms"
>

10



<
id
name
="id"
type
="java.lang.Integer"
>

11



<
column
name
="id"

/>

12



<
generator
class
="assigned"

/>

13



id
>

14



19



<
component
name
="name"
class
="org.lxh.hibernate.Name"
>

20



<
property
name
="firstname"
type
="java.lang.String"
>

21



<
column
name
="firstname"
length
="20"
not-null
="true"

/>

22



property
>

23



<
property
name
="lastname"
type
="java.lang.String"
>

24



<
column
name
="lastname"
length
="20"
not-null
="true"

/>

25



property
>

26



component
>

27



<
component
name
="contact"
class
="org.lxh.hibernate.Contact"
>

28



29



<
property
name
="address"
type
="java.lang.String"
>

30



<
column
name
="address"
length
="20"
not-null
="true"

/>

31



property
>

32



<
property
name
="zipcode"
type
="java.lang.String"
>

33



<
column
name
="zipcode"
length
="6"
not-null
="true"

/>

34



property
>

35



<
property
name
="tel"
type
="java.lang.String"
>

36



<
column
name
="tel"
length
="20"

/>

37



property
>

38



component
>

39



class
>

40



hibernate-mapping
>

41



src/org.lxh.hibernate.TestDemo.java

1



package
org.lxh.hibernate;

2



3



import
java.util.Iterator;

4



import
java.util.List;

5



6



import
sun.security.action.GetBooleanAction;

7



8





/** */
/**

9



*
@author
∪∩BUG E-mail: tidelgl@163.com

10



*
@version
Aug 30, 2008 8:55:03 PM

11



* @测试类

12



*/

13





public

class
TestDemo



{

14



15





/** */
/**

16



*
@param
args

17



*/

18





public

static

void
main(String[] args)



{

19



20



PersonsOperate po
=

new
PersonsOperate();

21





/**/
/*

22



//测试插入数据

23



Persons p = new Persons();

24



Name n = new Name();

25



Contact c = new Contact();

26



27



n.setFirstname("My");

28



n.setLastname("SQL");

29



30



c.setAddress("mysql.com");

31



c.setTel("12345678");

32



c.setZipcode("54321");

33



34



p.setId(1);

35



p.setName(n);

36



p.setContact(c);

37



38



po.insert(p);

39



*/

40



41



//
测试
查询全部数据

42



List l
=
po.queryAll();

43



Iterator iter
=
l.iterator();

44





while
(iter.hasNext())



{

45



Persons p
=
(Persons)iter.next();

46



System.out.println(
"
ID:/t
"

+
p.getId());

47



System.out.println(
"
FIRSTNAME:/t
"

+
p.getName().getFirstname());

48



System.out.println(
"
LASTNAME:/t
"

+
p.getName().getLastname());

49



System.out.println(
"
ADDRESS:/t
"

+
p.getContact().getAddress());

50



System.out.println(
"
TEL:/t
"

+
p.getContact().getTel());

51



System.out.println(
"
ZIPCODE:/t
"

+
p.getContact().getZipcode());

52



System.out.println(
"
----------------------------------------------
"
);

53



}

54



}

55



56



}

57



src/hibernate.cfg.xml

1



xml version='1.0' encoding='UTF-8'
?>

2



DOCTYPE hibernate-configuration PUBLIC

3



"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

4



"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"
>

5



6



7



<
hibernate-configuration
>

8



9



<
session-factory
>

10



<
property
name
="connection.username"
>
root
property
>

11



<
property
name
="connection.url"
>

12



jdbc:mysql://localhost:3306/STMS

13



property
>

14



<
property
name
="dialect"
>

15



org.hibernate.dialect.MySQLDialect

16



property
>

17



<
property
name
="myeclipse.connection.profile"
>

18



MySql_localhost

19



property
>

20



<
property
name
="connection.password"
>
root
property
>

21



<
property
name
="connection.driver_class"
>

22



com.mysql.jdbc.Driver

23



property
>

24



<
property
name
="show_sql"
>
true
property
>

25



26



27



<
mapping
resource
="org/lxh/hibernate/Persons.hbm.xml"

/>

28



29



session-factory
>

30



31



hibernate-configuration
>

例子结构: