1.导入jar包：
2.配置文件 — applicationContext.xml：
添加schema约束，位置：spring-framework-3.2.0.RELEASE—》docs—》spring-framework-reference—》html—》xsd-config.html
再配置service
<?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.xsd">
<!-- 配置service
<bean> 配置需要创建的对象
id ：用于之后从spring容器获得实例时使用的
class ：需要创建实例的全限定类名
-->
<bean id="userServiceId" class="com.itheima.a_ioc.UserServiceImpl"></bean>
</beans>
applicationContext.xml
其次，里面可以配置加载jdbc属性文件、数据源、spring框架用于整合Hibernate的工厂bean、事务管理器、组件扫描、引入注解解析器、 事务注解 等。如：
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 加载jdbc属性文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/> <!-- 数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driverClass}"/>
<property name="jdbcUrl" value="${jdbcUrl}"/>
<property name="user" value="${user}"/>
<property name="password" value="${password}"/>
</bean>
<!-- spring框架用于整合Hibernate的工厂bean -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 注入Hibernate相关的属性 -->
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<!-- 注入Hibernate的映射文件 -->
<property name="mappingDirectoryLocations">
<list>
<value>classpath:com/itheima/bos/domain</value>
</list>
</property>
</bean> <!-- 事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean> <!-- 组件扫描 -->
<context:component-scan base-package="com.itheima.bos"/>
<!-- 引入注解解析器 -->
<context:annotation-config/>
<!-- 事务注解 -->
<tx:annotation-driven />
</beans>
applicationContext.xml