java深入探究12-框架整合

1.Spring与Hibernate整合

  需要配置的就是hibernate和bean.xml

  1)关键点:sessionFactory创建交给SpringIOC;session的事务处理交给Spring的事务处理

  2)jar包:  

    连接池/数据库驱动包

    Hibernate相关jar

    Spring 核心包(5)

    Spring aop (4)

    spring-orm-3.2.5.RELEASE.jarspringhibernate的支持】

spring-tx-3.2.5.RELEASE.jar【事务相关】

  3)整合步骤:A:创建sessionFactory 的bean节点;B:对逻辑层的业务方法添加事务

    A:sessionFactory整合在Spring bean中的三种方式:

    1.全部hibernate.cfg.xml引入bean.xml中

    2.部分引入:dataSource连接池写在Spring中

    3.全部在bean.xml中写

    B:对逻辑层添加事务用aop事务方式

  4)例子:  

1.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="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########### -->
    <!-- 方式一:直接加载hibernate.cfg.xml文件的方式整合   这种方式 -->
    <!-- <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
    </bean> -->
    
    <!-- 方式二:连接池交给Spring来生成【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 方式三:所有配置全部写到Spring配置中 -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- 连接池配置 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- hibernate常用配置会 -->
        <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 -->
        <!-- hibernate映射配置 
        <property name="mappingLocations">
            <list>
                <value>classpath:entity/*.hbm.xml</value>
            </list>
        </property>
        -->
        <property name="mappingDirectoryLocations">
            <list>
                <value>classpath: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(* service.*.*(..))" id="pt"/>
         <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
</beans>     
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2.SSH:三大框架整合在一起

  1)引入SSH Jar

      Struts 核心jar

      Hibernate 核心jar

      Spring

        Core  核心功能

        Web  web模块支持

        Aop   aop支持

        Orm   hibernate支持

        Jdbc/tx  jdbc支持包、事务相关包

  2)配置

    Web.xml

 

      初始化struts功能、spring容器

 

      Struts.xml   配置请求路径与映射action的关系

 

    Spring.xml  IOC容器配置

 

    bean-base.xml     【公用信息】

 

    bean-service.xml

 

    bean-dao.xml

 

    bean-action.xml

  3)例子:

web.xml配置

  1.配置spring的OpenSessionInView模式 ;2.struts2配置 3.Spring配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    
    
    <!-- 配置spring的OpenSessionInView模式 【目的:JSp页面访问懒加载数据】 -->
    <!-- 注意:访问struts时候需要带上*.action后缀 -->
    <filter>
        <filter-name>OpenSessionInView</filter-name>
        <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>OpenSessionInView</filter-name>
        <url-pattern>*.action</url-pattern>
    </filter-mapping>
    <!-- struts2配置 -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- Spring配置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:bean*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
  <display-name></display-name>    
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>
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  2.配置src下的各层bean.xml

1.bean-base.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">

    
    <!-- 所有配置的公共部门 -->
    
    <!-- 1) 连接池实例 -->
    <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="6"></property>
    </bean>

    <!-- 2) SessionFactory实例创建 -->
    <!-- 所有的配置都由spring维护(项目中不需要hibernate.cfg.xml啦) -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- a. 连接池 -->
        <property name="dataSource" ref="dataSource"></property>
        
        <!-- b. hibernate常用配置: 方言、显示sql、自动建表等 -->
        <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>
        
        <!-- c. 映射配置 -->
        <property name="mappingLocations">
            <list>
                <value>classpath:entity/*.hbm.xml</value>
            </list>
        </property>
    </bean>
    
    <!-- 3) 事务配置 -->
    <!-- # 事务管理器 -->
    <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <!-- # 事务增强 -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    <!-- # AOP配置 -->
    <aop:config>
        <aop:pointcut expression="execution(* service.*.*(..))" id="pt"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
    
</beans>     
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 2.bean.dao.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">

    
    <bean id="employeeDao" class="cn.itcast.dao.EmployeeDao">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    
</beans>     
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  3.bean-service.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">

    
    <bean id="employeeService" class="cn.itcast.service.EmployeeService">
        <property name="employeeDao" ref="employeeDao"></property>
    </bean>
    
</beans>     
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 4.bean-action.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">

    <bean id="employeeAction" class="cn.itcast.action.EmployeeAction" scope="prototype">
        <property name="employeeService" ref="employeeService"></property>
    </bean>
    
</beans>     
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  3.配置structs

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <package name="emp" extends="struts-default">

        <!-- action实例交给spring容器创建 -->
        <action name="show" class="employeeAction" method="execute">
            <result name="success">/index.jsp</result>
        </action>

    </package>

</struts>
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 4.ssh在用的时候要注意的

  1)三者结合在一起时,对数据层进行操作本来是有hibernate的session对象来做的,现在可由spring来获得hibernate的得到hibernateTemple对象来代替springDao中的jdbcTemple和hibernate中的session和dbutil等工具

   使用它时需要实现HibernateDaoSupport接口;使用此接口的类也需要在bean中添加sessionFactory对象

spring 中获得由spring所配置的hibernate的操作对象,然后利用此对象进行,保存,修改和删除等操作,此方法是在配置了spring以后,hibernate由spring接管,不直接使用hibernate的session了 
HibernateTemplate提供非常多的常用方法来完成基本的操作,比如通常的增加、删除、修改、查询等操作,Spring 2.0更增加对命名SQL查询的支持,也增加对分页的支持。大部分情况下,使用Hibernate的常规用法,就可完成大多数DAO对象的CRUD操作。下面是HibernateTemplate的常用方法简介:
q      void delete(Object entity):删除指定持久化实例
q      deleteAll(Collection entities):删除集合内全部持久化类实例
q      find(String queryString):根据HQL查询字符串来返回实例集合
q      findByNamedQuery(String queryName):根据命名查询返回实例集合
q      get(Class entityClass, Serializable id):根据主键加载特定持久化类的实例
q      save(Object entity):保存新的实例
q      saveOrUpdate(Object entity):根据实例状态,选择保存或者更新
q      update(Object entity):更新实例的状态,要求entity是持久状态
q      setMaxResults(int maxResults):设置分页的大小
getHibernateTemplate已经封装好了一些基本的方法,可以直接去用,也就是template嘛, 
而getSession只是获取一个数据工厂的session,然后大部分方法都需要自己写,加hql语句,然后用query方法执行 

谈不上什么优点缺点,类似添加删除更新这样的可以直接用getHibernateTemplate而大部分带条件查询的就需要用getSession自己写了
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& 
主流技术到底就是主流技术,效率就不一般。
Hibernate封装了对数据库的例行操作,比单纯的jdbc的DAO,开发效率要高很多了。而Springframework对Hibernate的操作又进行了进一步的包装,又将开发效率提升不少。下面的例子是Spring自己给的petclinic的样本程序。
原来b/s架构的大量数据库操作可以这么轻松搞定
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posted @ 2017-06-01 20:47  王吉平  阅读(202)  评论(0编辑  收藏  举报