基于Eclipse Maven的Spring4/Spring-MVC/Hibernate4整合之二： Spring/proxool数据源/Hibernate的配置

      我们用的数据库为postgresql 9.4， 连接池用的是proxool。

      先全局看看文件分布位置：



      先配置web.xml,在里面定义Spring的编码CharacterEncodingFilter，设置为utf8，proxool初始化类，和spring 的初始化类DispatcherServlet， spring容器初始化、web mvc这些的入口都靠它完成，在这个类里面指定容器的指定配置参数为classpath下的applicationContext.xml。

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>gpchat</display-name>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--管理proxool配置文件-->
<servlet>
<servlet-name>proxoolServletConfigurator</servlet-name>
<servlet-class>org.logicalcobwebs.proxool.configuration.ServletConfigurator
</servlet-class>
<init-param>
<param-name>xmlFile</param-name>
<param-value>WEB-INF/proxool.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!--
<servlet>
<servlet-name>context</servlet-name>
<servlet-class>
org.springframework.web.context.ContextLoaderServlet
</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
-->
<servlet>
<servlet-name>gpchat</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>gpchat</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

因为spring作为容器，管理的类别很多，为了方便管理，我将它们分开存放（看图中黄色部分），然后在applicationContext.xml里面一一引用。

打开applicationContext.xml，里面最先导入数据库配置文件spring-db.xml，再导入hibernate配置，然后自动扫描controller和dao的包并根据包里面类的依赖关键字进行加载；这里还配置了一个contextHolder的类，可以用它直接获得容器里面的类实例（ContextHolder.getBean("beanid"))；最后加载spring-config/下面所有的xml配置文件

<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> 
<!--
<context:component-scan base-package="com.freestyle.test"/>
-->
<import resource="classpath*:/spring-db-config/spring-db.xml"/>
<import resource="classpath*:/hibernate-config/spring-hibernate.xml"/>
<context:component-scan base-package="com.freestyle.spring;com.freestyle.test.controller;com.freestyle.test.hibernate.dao;com.freestyle.test.hibernate.controller"/>

<mvc:annotation-driven></mvc:annotation-driven>
<!-- 解决@ResponseBody 的实现类其默认的编码是 iso-8859-1的问题 -->
<mvc:annotation-driven>
<mvc:message-converters>
<!-- default StringHttpMessageConverter, solve encoding problem -->
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<constructor-arg value="UTF-8" />
<property name="writeAcceptCharset" value="false" />
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/views" />
<property name="suffix" value=".jsp" />
</bean>
<!-- 通过配置contextHolder来获得ApplicationContext -->
<bean id="contextHolder" class="com.freestyle.spring.ContextHolder">
</bean>

<import resource="classpath*:/spring-config/*.xml"/>

<!-- ss
<bean name="/hello" class="com.freestyle.test.controller.HelloController"/>
-->
</beans>

下面是spring-db.xml数据源的配置，里面除了配置dataSource,还有一个jdbcTemplate：

<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
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-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd"> <!-- 配置数据源 -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>org.logicalcobwebs.proxool.ProxoolDriver</value>
</property>
<property name="url">
<value>proxool.bmsdbv2</value>
</property>
</bean>
<!-- 配置Jdbc Template -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<constructor-arg ref="dataSource">
</constructor-arg>
</bean>

</beans>

 

下面是hibernate插件的配置文件，spring-hibernate.xml，里面配置了sessionfactory和transactionmanager,个人比较抗拒为每个pojo配置一个xml（简直多此一举），所以用在pojo里面注解的方式作为hibernate的entity，所以指定了packagesToScan属性，传入entity所在的包，hibernate会在适当的时候使用这些entities：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
<span style="white-space:pre">	</span>xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
<span style="white-space:pre">	</span>xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
<span style="white-space:pre">	</span>xmlns:tx="http://www.springframework.org/schema/tx"
<span style="white-space:pre">	</span>xsi:schemaLocation="http://www.springframework.org/schema/beans 
<span style="white-space:pre">		</span>http://www.springframework.org/schema/beans/spring-beans.xsd 
        http://www.springframework.org/schema/context          http://www.springframework.org/schema/context/spring-context-4.1.xsd          http://www.springframework.org/schema/mvc         
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-4.1.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">    
<!-- 配置hibernate的session factory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" destroy-method="destroy">
<property name="dataSource" ref="dataSource"></property>
<property name="packagesToScan"> <!-- hibernate sessionFactory管理的类存放位置，自动装载 -->
<list>
<value>com.freestyle.test.hibernate.entities</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<!-- 设置自动创建|更新|验证数据库表结构 -->
<prop key="hibernate.hbm2ddl.auto">update</prop>
<!-- 是否在控制台显示sql -->
<prop key="hibernate.show_sql">true</prop>
<!-- 是否格式化sql，优化显示 -->
<prop key="hibernate.format_sql">true</prop>
<!-- 是否开启二级缓存 -->
<prop key="hibernate.cache.use_second_level_cache">false</prop>
<!-- 是否开启查询缓存 -->
<prop key="hibernate.cache.use_query_cache">false</prop>
<!-- 数据库批量查询最大数 -->
<prop key="hibernate.jdbc.fetch_size">100</prop>
<!-- 数据库批量更新、添加、删除操作最大数 -->
<prop key="hibernate.jdbc.batch_size">50</prop>
<!-- 是否自动提交事务 -->
<prop key="hibernate.connection.autocommit">false</prop>
<!-- 指定hibernate在何时释放JDBC连接 -->
<prop key="hibernate.connection.release_mode">auto</prop>
</props>
</property>
</bean>
<!-- 定义Hibernate事务管理 -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>