这是我的applicationContext

<?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:tx="http://www.springframework.org/schema/tx" 
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx.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-4.3.xsd">
<context:component-scan base-package="com.crc.." />
<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${driver}"/>
    <property name="jdbcUrl" value="${url}"/>
    <property name="user" value="${username}"/>
    <property name="password" value="${password}"/>
<property name="initialPoolSize" value="100"/>
  <property name="maxIdleTime" value="500"/> 
<property name="maxPoolSize" value="20"/>
<property name="minPoolSize" value="10"/>
</bean>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
     <property name="location" value="classpath:com.properties"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:MyBatis.cfg.xml" />
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:advice id="advice" transaction-manager="transactionManager" >
<tx:attributes>
<tx:method name="insert" propagation="REQUIRED"/>
<tx:method name="update" propagation="REQUIRED"/>
<tx:method name="delete" propagation="REQUIRED"/>
<tx:method name="find" propagation="REQUIRED"/>
<tx:method name="queryForNum" propagation="REQUIRED"/>
<tx:method name="count" propagation="REQUIRED"/>
<tx:method name="queryForPage" propagation="REQUIRED"/>
<tx:method name="*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:advisor advice-ref="advice" pointcut="execution(* com.crc.serviceImp.*.*(..))"/>
</aop:config>
</beans>
这是我的serviceImp
@Service
public class MembersServiceImp implements MembersService {
@Autowired
private MembersDao memberDao;
@Override
public void insert(Members members) {
// TODO Auto-generated method stub
memberDao.insert(members);
}
这里的@Autowired是什么作用呢？和applicationContext里的配置是怎么联系的？