AOP事物连接，记忆连接数据库，连接池

 xmlns:aop="http://www.springframework.org/schema/aop"
 xmlns:cOntext="http://www.springframework.org/schema/context"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xmlns="http://www.springframework.org/schema/beans"
 xsi:schemaLocation="http://www.springframework.org/schema/aop
 http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-4.2.xsd
 http://www.springframework.org/schema/tx
 http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
 http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-4.2.xsd ">