步骤一:在web.xml中配置spring
    <context-param>    
        <param-name>contextConfigLocation</param-name>    
        <param-value>classpath*:spring/applicationContext*.xml</param-value>    
    </context-param>

    <!--Spring的ApplicationContext 载入 -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
 
步骤二:配置applicationContext.xml
 
<!--设置配置文件-->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">            
       <property name="locations">            
            <list>            
                 <value>classpath*:/application.properties</value>
                 <value>classpath*:/db.properties</value>  
            </list>            
       </property>            
</bean>        
 
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">    
        <property name="maxActive" value="20" />    
        <property name="maxIdle" value="20" />    
        <property name="maxWait" value="3000" />    
        <property name="testWhileIdle" value="true" />    
        <property name="timeBetweenEvictionRunsMillis" value="3600000" />    
        <property name="validationQuery" value="select 1" />    
        <property name="removeAbandoned" value="true" />    
        <property name="removeAbandonedTimeout" value="1" />    
  <property name="driverClassName" value="${jdbc.driverClassName}" />    
  <property name="url" value="${jdbc.url}" />    
  <property name="username" value="${jdbc.username}" />    
  <property name="password" value="${jdbc.password}" />    
    </bean>    
 
  <bean id="sqlSessionFactory" class="org.springframework.orm.ibatis3.SqlSessionFactoryBean">
    <property name="configLocation" value="classpath:ibatis-config.xml" />
    <property name="dataSource" ref="dataSource" />
  </bean>
  <bean id="sqlSessionTemplate" class="org.springframework.orm.ibatis3.SqlSessionTemplate">
    <property name="sqlSessionFactory" ref="sqlSessionFactory" />
  </bean>
  <!--事务配置-->
  <tx:annotation-driven transaction-manager="transactionManager" />
  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" autowire="byName" />
注:db.properties内容如下
jdbcNum=2
jdbc.driverClass=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://192.168.1.1:3306/bookdb?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false
jdbc.username=sophie
jdbc.passworld=123456