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Spring整合Hibernate：1、annotation方式管理SessionFactory

2016-02-19 00:00 639 查看
1、在applicationContext.xml文件中初始化SessionFactory（annotation方式）

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<

bean



class

=

"org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"

>



<

property

name

=

"locations"

value

=

"classpath:jdbc.properties"

/>


</

bean

>


<

bean

id

=

"dataSource"

destroy-method

=

"close"



class

=

"org.apache.commons.dbcp.BasicDataSource"

>



<

property

name

=

"driverClassName"

value

=

"${jdbc.driverClassName}"

/>



<

property

name

=

"url"

value

=

"${jdbc.url}"

/>



<

property

name

=

"username"

value

=

"${jdbc.username}"

/>



<

property

name

=

"password"

value

=

"${jdbc.password}"

/>


</

bean

>


<!-- annotation方式管理hibernate的sessionFactory -->


<

bean

id

=

"mySessionFactory"



class

=

"org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"

>



<

property

name

=

"dataSource"

ref

=

"dataSource"

/>



<

property

name

=

"annotatedClasses"

>



<

list

>



<

value

>com.fz.annotation.model.User</

value

>



</

list

>



</

property

>



<

property

name

=

"hibernateProperties"

>



<

props

>



<

prop

key

=

"hibernate.dialect"

>org.hibernate.dialect.MySQLDialect</

prop

>



<

prop

key

=

"hibernate.show_sql"

>true</

prop

>



<

prop

key

=

"hibernate.format_sql"

>true</

prop

>



</

props

>



</

property

>


</

bean

>


一个数据库连接，只需要一个SessionFactory即可。通过sessionFactory来获取session，所以让Spring来管理hibernate的SessionFactory比较合适

因为，Spring管理的bean默认就是单例模式。

在使用了annotation方式之后就不需要配置User.hbm.xml文件了，例如，在<property>标签的list中定义的是对象，而不是User.hbm.xml

1.1 使用PackagesToScan来扫描包

查看annotatedClasses这个属性,每一个实体类都要写在这里，比较麻烦。

<

property

name

=

"annotatedClasses"

>



<

list

>



<

value

>com.fz.annotation.model.User</

value

>



</

list

>


</
property
>


所以，可以使用AnnotationSessionFactoryBean的一个packagesToScan属性即可







修改后的配置如下：以后的实体都放到相应的包里面即可

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<

property

name

=

"packagesToScan"

>



<

list

>



<

value

>com.fz.annotation.model</

value

>



</

list

>


</

property

>


2、导入hibernate3的jar包



3、编写User实体类

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package

com.fz.annotation.model;


import

javax.persistence.Entity;


import

javax.persistence.GeneratedValue;


import

javax.persistence.Id;


@Entity


public

class

User {



private

int

id;



private

String username;



@Id



@GeneratedValue



public

int

getId() {



return

id;



}



public

void

setId(

int

id) {



this

.id = id;



}



public

String getUsername() {



return

username;



}



public

void

setUsername(String username) {



this

.username = username;



}




}


该实体类属性需要和数据库中字段名对应，不能多

4、使用sessionFactory

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package

com.fz.annotation.dao.impl;


import

javax.annotation.Resource;


import

org.hibernate.Session;


import

org.hibernate.SessionFactory;


import

org.springframework.stereotype.Repository;


import

com.fz.annotation.dao.UserDao;


import

com.fz.annotation.model.User;


@Repository

(

"userDao"

)


public

class

UserDaoImpl

implements

UserDao{



private

SessionFactory sessionFactory;



public

void

userAdd(User user) {



Session session = sessionFactory.openSession();



session.beginTransaction();



session.save(user);



session.getTransaction().commit();



session.close();



}



public

SessionFactory getSessionFactory() {



return

sessionFactory;



}



@Resource



public

void

setSessionFactory(SessionFactory sessionFactory) {



this

.sessionFactory = sessionFactory;



}


}


来自为知笔记(Wiz)
                                            

                                        

                        
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