在配置文件applicationContext.xml设置如下：
<?xml version="1.0" encoding="UTF-8"?>
< beans xmlns="http://www.springframework.org/schema/beans"
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-2.0.xsd">
<bean >
< !-- 连接MySQL-->
< property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
< property name="url" value="jdbc:mysql://localhost:3306/mytest"></property>
< property name="username" value="root"></property>
< property name="password" value="root"></property>
<!-- 连接Oracle -->
< property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
< property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
< property name="username" value="scott"></property>
< property name="password" value="tiger"></property>
< !-- 连接SQL Server-->
< property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
< property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=test"></property>
< property name="username" value="sa"></property>
< property name="password" value="123"></property>
< property name="maxActive" value="100"></property>
< property name="maxIdle" value="30"></property>
< property name="maxWait" value="500"></property>
< property name="defaultAutoCommit" value="true"></property>
< /bean>
<bean >
< property name="dataSource" ref="dataSource"></property>
< property name="hibernateProperties">
< props>
< !-- MySQL的方言-->
< prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<!-- Oracle的方言 -->
<prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
< !-- SQL Server的方言-->
<prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>
< prop key="hibernate.show_sql">true</prop>
< /props>
< /property>
< property name="mappingResources">
< list>
< value>com/test/bean/User.hbm.xml</value>
< /list>
< /property>
< /bean>
<bean >
< property name="sessionFactory"> < ref bean="sessionFactory"/>
< /property>
< /bean>
<bean >
< property name="userDao" ref="userDao"></property>
< /bean>
<bean >
< property name="service" ref="userService"></property>
< /bean>
<bean >
< property name="service" ref="userService"></property>
< /bean>
<bean >
< property name="service" ref="userService"></property>
< /bean>
</beans>