Spring与Hibernate整合

Posted 2020-08-23

Spring与Hibernate整合

Spring与Hibernate整合关键点：

         1） Hibernate的SessionFactory对象交给Spring创建；   SessionFactory即是hibernate.cfg.xml配置文件

         2） hibernate事务交给spring的声明式事务管理。

 

SSH整合：

         Spring与Struts；

         Spring与hibernate整合；

 

 

SH整合步骤：

         1）引入jar包

                   连接池/数据库驱动包   spring对c3p0连接池的支持比hibernate对C3p0支持的还要好

                   Hibernate相关jar

                   Spring 核心包(5个)

                   Spring aop 包(4个)

                   spring-orm-3.2.5.RELEASE.jar        【spring对hibernate的支持】

　　　　　　  spring-tx-3.2.5.RELEASE.jar           【事务相关】

         2）配置

                   hibernate.cfg.xml   Spring与Hibernate整合的时候，建议该配置文件内容也整合到bean.xml中

                   bean.xml

         3）搭建环境、单独测试（单独测试Hibernate，Spring的环境是否正确）

                 

步骤实现

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;
    }
}

 

Dept.hbm.xml

<?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>

 

// 数据访问层，单独测试Hibernate的环境是否正确  未与Spring整合的数据访问层
public class DeptDao_bak {
    
    private static SessionFactory sessionFactory;
    static {
        sessionFactory = new Configuration().configure().buildSessionFactory();
    }

    // 保存一个记录
    public void save(Dept dept) {
        // 创建配置管理类对象、创建SessionFactory、创建Session,  执行操作， 关闭
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        // 保存
        session.save(dept);

        session.getTransaction().commit();
        session.close();
    }
}

 

// 数据访问层 与Spring整合
public class DeptDao {
    // Spring与Hibernate整合： IOC容器注入
    private SessionFactory sessionFactory;
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    // 保存一个记录
    // Spring与Hibernate整合：事务管理交给Spring
    public void save(Dept dept) {
        sessionFactory.getCurrentSession().save(dept);
    }
}

 

// 业务逻辑层
public class DeptService {
   
    private DeptDao deptDao;
    public void setDeptDao(DeptDao deptDao) {
        this.deptDao = deptDao;
    }
    
    public void save(Dept dept){
        deptDao.save(dept);
    }
}

 

测试类：

public class App {
    
    // 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());
    }
}

 

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 实例 -->
    <bean id="deptDao" class="cn.itcast.dao.DeptDao">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    
    <!-- service 实例 -->
    <bean id="deptService" class="cn.itcast.service.DeptService">
        <property name="deptDao" ref="deptDao"></property>
    </bean>
    
    <!-- 数据源配置 -->
    <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与Hibernate整合  start########### -->
    
    <!-- 方式（1）直接加载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> 指类路径下的配置文件hibernate.cfg.xml
    </bean>    -->
    
    <!-- 方式（2）连接池交给spring管理  【一部分配置写到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> -->
    
    <!-- 【推荐】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">
        <!-- 注入连接池对象 -->
        <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与Hibernate整合  end########### -->
    
    <!-- 事务配置 -->
    <!-- a. 配置事务管理器类 -->
    <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <!-- b. 配置事务增强(拦截到方法后如果管理事务?) -->
    <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>     

 

 

细节：