spring(4)(spring和hibernate的整合)


疑問:整合默認是采用綁定線程的方式創建session 並且可以不用配置(只能通過getcurrentsession)

關於hibernate的session管理,如果是struts可以使用攔截器對session創建關閉提供一種模式(action的訪問前和結束后(這樣為了方便獲得懶加載數據))

 

簡介:hibernate3.6+spring3.2.5

Spring與Hibernate整合

Spring與Hibernate整合關鍵點:

1) Hibernate的SessionFactory對象交給Spring創建;
2) hibernate事務交給spring的聲明式事務管理。

整合步驟:

1)引入jar包

Hibernate相關jar
Spring 核心包(5個)
Spring aop 包(4個)
orm包(包括:連接池/數據庫驅動包/spring-orm-3.2.5.RELEASE.jar【spring對hibernate的支持】/spring-tx-3.2.5.RELEASE.jar【事務相關】)

2)配置(可以將hibernate內容配置到beanxml中整合成一個文件)

hibernate.cfg.xml
bean.xml

實例:(在整合中可以一個個框架測試再整合)

dao:

DeptDao.java(默認session是綁定生命周期是綁定線程的,可以不用配置,可以通過getCurrentSession()獲得session

// 數據訪問層
public class DeptDao {
    // Spring與Hibernate整合: IOC容器注入
    private SessionFactory sessionFactory;
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    // 保存一個記錄
    // Spring與Hibernate整合:事務管理交給Spring
    public void save(Dept dept) {
        sessionFactory.getCurrentSession().save(dept);
    }

DeptDao_bak.java(測試hibernate,此例子省略了hibernate的配置)

// 數據訪問層
public class DeptDao_bak {
    private static SessionFactory sessionFactory;
    static {
        sessionFactory = new Configuration().configure().buildSessionFactory();
    }
    // 保存一個記錄
    public void save(Dept dept) {
        // 創建配置管理類對象、創建SessionFactory、創建Session,  執行操作, 關閉
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        // 保存
        session.save(dept);
        session.getTransaction().commit();
        session.close();
    }

entity:

Dept.java

public class Dept {
    private int id;
    private String name;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
View Code
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="cn.itcast.entity">

    <class name="Dept" table="t_dept">
        <id name="id" column="deptId">
            <generator class="native"></generator>
        </id>
        <property name="name" column="deptName"></property>
    </class>
</hibernate-mapping>
View Code

service:

DeptService.java

// 業務邏輯層
public class DeptService {
    private DeptDao deptDao;
    public void setDeptDao(DeptDao deptDao) {
        this.deptDao = deptDao;
    }
    
    public void save(Dept dept){
        deptDao.save(dept);
    }}

bean.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
          http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx
          http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- dao 實例 -->
    <bean id="deptDao" class="cn.itcast.dao.DeptDao">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    
    <!-- service 實例 -->
    <bean id="deptService" class="cn.itcast.service.DeptService">
        <property name="deptDao" ref="deptDao"></property>
    </bean>
    
    <!-- 數據源配置 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="10"></property>
        <property name="maxStatements" value="100"></property>
        <property name="acquireIncrement" value="2"></property>
    </bean>
    
    <!-- ###########Spring與Hibernate整合  start########### -->
    
    <!-- 方式(1)直接加載hibernate.cfg.xml文件的方式整合
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
    </bean>    -->
    
    <!-- 方式(2)連接池交給spring管理  【一部分配置寫到hibernate中,一份分在spring中完成】 
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
        <property name="dataSource" ref="dataSource"></property>
    </bean> -->
    
    <!-- 【推薦】方式(3)所有的配置全部都在Spring配置文件中完成 -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- 注入連接池對象 -->
        <property name="dataSource" ref="dataSource"></property>
        
        <!-- hibernate常用配置 -->
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
        
        <!-- hibernate映射配置 
        <property name="mappingLocations">
            <list>
                <value>classpath:cn/itcast/entity/*.hbm.xml</value>
            </list>
        </property>
        -->
        <property name="mappingDirectoryLocations">
            <list>
                <value>classpath:cn/itcast/entity/</value>
            </list>
        </property>
    </bean>    
    
    <!-- ###########Spring與Hibernate整合  end########### -->
    
    <!-- 事務配置 -->
    <!-- a. 配置事務管理器類 -->
    <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <!-- b. 配置事務增強(攔截到方法后如果管理事務?) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    <!-- c. Aop配置 -->
    <aop:config>
         <aop:pointcut expression="execution(* cn.itcast.service.*.*(..))" id="pt"/>
         <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
    
</beans>     

測試類:

    // 容器
    private ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");

    @Test
    public void testApp() throws Exception {
        DeptService deptServie = (DeptService) ac.getBean("deptService");
        System.out.println(deptServie.getClass());
        
        deptServie.save(new Dept());
    }

 


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