Aop的第一种配置方法：aop:advisor
1）第一种配置方法：aop:advisor:
advice-ref说明切别人的程序是什么,advice的英文翻译是“通知”，意思是主业务程序执行到某个方法之前之后发出的通知。pointcut-ref说明被切的业务主程序是什么。
例 2.1.1
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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"
>
<context:component-scan
base-package="com" />
<context:component-scan
base-package="service" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="loginService" class="service.LoginServiceImpl" >
</bean>
<bean id="myTransactionManager" class="aop.AOPMyTransactionManagerMark_To_Win" />
<!-- 配置切面 这种写法也正确"execution(* service.*.*(..))"-->
<aop:config>
<aop:pointcut id="myPointcut" expression="execution(* service.LoginServiceImpl.*(..))" />
<aop:advisor advice-ref="myTransactionManager" pointcut-ref="myPointcut"/>
</aop:config>
</beans>
<%@ page contentType="text/html; charset=GBK" %>
<html>
<head>
<title>Spring 3.0</title>
</head>
<body>
<a href="helloa.do">点击跳转，你好，马克-to-win</a>
</body>
</html>
package com;
import javax.annotation.Resource;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.support.RequestContextUtils;
import service.interfac.ILoginService;
@Controlle
public class HelloWorldController {
private ILoginService loginServic;
@RequestMapping("/helloa")
public ModelAndView helloWorld(HttpServletRequest request, HttpServletResponse response,
HttpSession sesssion) {
ServletContext sc=RequestContextUtils.getWebApplicationContext(request).getServletContext();
WebApplicationContext wac=WebApplicationContextUtils.getRequiredWebApplicationContext(sc);
ILoginService loginServic=(ILoginService)wac.getBean("loginService");
loginServic.login();
System.out.println("after loginServic.login()");
/*ModelAndView就是在view和model中传数据*/
return new ModelAndView("/helloq", "message", "你好");
}
}
package service;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Service;
import com.NiutDAO;
import service.interfac.ILoginService;
public class LoginServiceImpl implements ILoginService {
public void login() {
System.out.println("LoginServiceImpl");
}
}
package aop;
import java.lang.reflect.Method;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
public class AOPMyTransactionManagerMark_To_Win implements MethodInterceptor {
public Object invoke(MethodInvocation arg0) throws Throwable {
System.out.println("模拟start transaction");
arg0.proceed();
System.out.println("模拟commit transaction");
return null;
}
}
helloq.jsp
<%@ page contentType="text/html; charset=GBK" %>
<html>
<body>
${message}
</body>
</html>
输出结果：
模拟start transaction
LoginServiceImpl
模拟commit transaction
after loginServic.login()
补充语法：execution(modifiers-pattern? ret-type-pattern declaring-type-pattern? name-pattern(param-pattern)throws-pattern?)
returning type pattern,name pattern, and parameters pattern是必须的.
ret-type-pattern:可以为*表示任何返回值,全路径的类名等.
name-pattern:指定方法名,*代表所有,set*,代表以set开头的所有方法.
parameters pattern:指定方法参数(声明的类型),(..)代表所有参数,(*)代表一个参数,(*,String)代表第一个参数为任何值,第二个为String类型.
例如：
<aop:pointcut id="myPointcut" expression="execution(* service.LoginServiceImpl.*(..))" />
更多请见下节：https://blog.csdn.net/qq_44591615/article/details/109206288
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本文系转载，前往查看
如有侵权，请联系 cloudcommunity@tencent.com 删除。
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