SpringMVC之application-context.xml，了解数据库相关配置

上一篇SpringMVC之web.xml让我们了解到配置一个web项目的时候，如何做基础的DispatcherServlet相关配置，作为SpringMVC上手的第一步，而application-context.xml则让我们了解到如何将数据库信息加载到项目中，包含关键的数据库连接信息、sqlSessionFactory、事务等关键因素。

①、xml内容

<?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:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="  
    http://www.springframework.org/schema/beans   
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
    http://www.springframework.org/schema/tx   
    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

    <bean class="com.honzh.common.config.EncryptPropertyPlaceholderConfigurer">
         <property name="locations">
            <value>file:C:/properties/ymeng.properties</value>
        </property>
    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <!-- Connection Info -->
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}?useUnicode=true&amp;characterEncoding=utf8&amp;" />
        <property name="username" value="${username}" />
        <property name="password" value="${password}" />

        <!-- Connection Pooling Info -->
        <property name="maxActive" value="${maxActive}" />
        <property name="maxIdle" value="${maxIdle}" />
        <property name="defaultAutoCommit" value="false" />
        <property name="timeBetweenEvictionRunsMillis" value="3600000"/>
        <property name="minEvictableIdleTimeMillis" value="3600000"/>

        <property name="testOnBorrow" value="true" />
        <property name="validationQuery">
            <value>select 1 from DUAL</value>
        </property>
    </bean>

    <!-- 创建SqlSessionFactory，同时指定数据源 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
    </bean>

        <!-- Mapper接口所在包名，Spring会自动查找其下的Mapper -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.honzh.biz.database.mapper" />
        <property name="sqlSessionFactory" ref="sqlSessionFactory" />
    </bean>

    <!-- transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 可通过注解控制事务 -->
    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="springContextHolder" class="com.honzh.common.spring.SpringContextHolder" />
</beans>