注解方式增强（实现登录日志录入数据库）（前置增强+后置增强）

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LoginAspectJ中的代码

import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import com.baobaotao.domain.User;import com.baobaotao.service.UserService;@Aspectpublic class LoginAspectJ {@Autowiredprivate UserService userService;@Before("execution(* com.baobaotao.web.UserController.loginCheck(..))")public void beforeloginCheck(){System.out.println("before"+"How are u !");}@AfterReturning("execution(* com.baobaotao.web.UserController.loginCheck(..))")public void afterloginCheck(){System.out.println("after"+"How are u !");HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()) .getRequest();HttpSession  session = request.getSession();User user = (User) session.getAttribute("user");if(user!=null){userService.loginSuccess(user);}}}

baobaotao-servlet.xml 配置部分

<?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:p="http://www.springframework.org/schema/p"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-3.0.xsd       http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-3.0.xsd       http://www.springframework.org/schema/aop       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">              <!-- 扫描web包，应用Spring的注解 --><context:component-scan base-package="com.baobaotao.web"/><context:component-scan base-package="com.baobaotao.dao"/>    <context:component-scan base-package="com.baobaotao.service"/>    <context:component-scan base-package="com.baobaotao.aspectj"/><aop:aspectj-autoproxy/><bean id="userservice" class="com.baobaotao.service.UserService"/><bean class="com.baobaotao.aspectj.LoginAspectJ"/><!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"p:viewClass="org.springframework.web.servlet.view.JstlView" p:prefix="/WEB-INF/jsp/"p:suffix=".jsp" /></beans>

新增的aop部分，和xsi:schemaLocation 路径里的 aop 和 aop-3.0.xsd

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