springmvc3.1.1+hibernate4

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上篇介绍了基本的配置，这篇着重介绍与hibernate4整合。

1.web.xml文件中加入spring-hibernate的配置。新的web.xml文件内容如下：

<?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">
<display-name></display-name> <context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml,classpath:spring-hibernate.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<servlet>
<description>spring mvc servlet</description>
<servlet-name>springMvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<description>spring mvc 配置文件</description>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>springMvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>10</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>/views/index.jsp</welcome-file>
</welcome-file-list>
</web-app>

2.编写spring-hibernate.xml文件，内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> 
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close"> <property name="driverClass" value="${database.driver}" />
<property name="jdbcUrl" value="${database.url}" />
<property name="user" value="${database.user}" />
<property name="password" value="${database.password}" />
<property name="maxPoolSize" value="60" />
<property name="minPoolSize" value="1" />
<property name="initialPoolSize" value="10" />
<property name="acquireRetryAttempts" value="30" />
<property name="acquireRetryDelay" value="100" />
<property name="breakAfterAcquireFailure" value="false" />
</bean> <bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
<prop key="javax.persistence.validation.mode">none</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.rainbow.model</value>
</list>
</property> </bean> 


<tx:annotation-driven transaction-manager="txManager"
proxy-target-class="true" /> <bean id="txManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean> 


</beans>

目前采用注解的方式进行配置的管理，另外，数据库连接池管理我们采用c3p0，测试数据库选用的mysql，这样我们需要引入新的jar包，

目前hibernate4 需要的包有

另外，我们如果需要调试日志的话，log4j.jar,slf4j-api-1.5.8.jar,slf4j-log4j12-1.5.8.jar, c3p0需要c3p0-0.9.1.jar，mysql需要mysql-connector-java-5.1.15.jar。这些包，另外autowired注册bean的时候需要cglib-nodep-2.1_3.jar

（既然介绍到这里，假如我们需要配置aop切片的话，需要aspectjrt-1.6.8.jar和aspectjweaver-1.6.8.jar)

（文件上传通常会用到commons-fileupload-1.2.2.jar）

3.编写相应的java文件。

具体方法请查看代码，几点说明注释，数据持久层需要@Repository，这边有个问题需要注意一下：

1、以前集成hibernate3和spring的时候，spring的ORM包里提供了HibernateSupport和HibernateTemplate这两个辅助类，我用的是HibernateTemplate。不过在Hibernate4里，spring不再提供这种辅助类，用的是hibernate4的原生API

2、集成hibernate4之后，最小事务级别必须是Required，如果是以下的级别，或者没有开启事务的话，无法得到当前的Session