[置顶] spring切点切面aop——xml非注解
aop代理就是到了某个方法（被称为“切点”），在执行这个方法之前干什么、之后干什么、异常了有什么等（这些在“切面”中定义） <!-- 增加aop头，共五个 --> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd "> <!-- 在spring-context.jar的meta-inf//spring-context.jar中确定xsd是哪个版本 --> <!-- <context:annotation-config></context:annotation-config> --> <!-- 告诉spring扫描哪个包，我让他扫描proxy.spring.agent所有的类-->
<context:component-scan base-package="proxy.spring.agent.*"></context:component-scan> <!-- 定义两个bean类 --> <bean id="myAgent" class="proxy.spring.agent.AgentProxy"></bean> <bean id="singer" class="proxy.spring.agent.MySinger"></bean> <!-- 这才是正题，spring aop切点切面就要有切点和切面，下面就是切点pointcut 和切面aspect--> <aop:config> <!-- 定义一个切点 --> <!-- execution 表达式第一个表示任意返回类型（public、..）,第二个表示proxy.spring.agent.MySinger下的任意方法，*(..)表示任意方法任意参数也就是这个类下的所有方法都会被代理--> <aop:pointcut expression="execution(* proxy.spring.agent.MySinger.*(..))" id="point1"/> <!-- 定义一个切面 --> <aop:aspect id="aspect1" ref="myAgent"> <!-- 这是定义切点之前、之后、抛异常该干什么 --> <aop:before method="before" pointcut-ref="point1"/> <aop:after method="after" pointcut-ref="point1" /> <aop:after-returning method="afterReturn" pointcut-ref="point1"/> <aop:after-throwing method="afterThrow" pointcut-ref="point1"/> <aop:around method="around" pointcut-ref="point1"/> </aop:aspect> </aop:config> </beans>
-----------------------------------------源码例子（歌手做例子）----------------------------------
-----------------------------------------xml----------------------（歌手和经纪人之间的约定）--------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
">
<!-- 在spring-context.jar的meta-inf//spring-context.jar中确定xsd是哪个版本 -->
<!-- <context:annotation-config></context:annotation-config> -->
<context:component-scan base-package="proxy.spring.agent.*"></context:component-scan>
<bean id="myAgent" class="proxy.spring.agent.AgentProxy"></bean>
<bean id="singer" class="proxy.spring.agent.MySinger"></bean>
<aop:config>
<aop:pointcut expression="execution(* proxy.spring.agent.MySinger.*(..))" id="point1"/>
<aop:aspect id="aspect1" ref="myAgent">
<aop:before method="before" pointcut-ref="point1"/>
<aop:after method="after" pointcut-ref="point1" />
<aop:after-returning method="afterReturn" pointcut-ref="point1"/>
<aop:after-throwing method="afterThrow" pointcut-ref="point1"/>
<aop:around method="around" pointcut-ref="point1"/>
</aop:aspect>
</aop:config>
</beans>
---------------------------------------------------代理类proxy.spring.agent.AgentProxy-----------------（歌手的经纪人，管着歌手的吃饭拉。。）------------------------------
package proxy.spring.agent;
import javax.sound.midi.SysexMessage;
import org.aspectj.lang.ProceedingJoinPoint;
public class AgentProxy {
public void before(){
System.out.println("before()........");
}
public void after(){
System.out.println("after()......");
}
public void afterThrow(){
System.out.println("after()......");
}
public void around(ProceedingJoinPoint p){
//得到参数
Object[] o= p.getArgs();
for (int i = 0; i < o.length; i++) {
Object object = o[i];
System.out.println(object);
}
try {
//必须加，不加就不执行原函数
p.proceed();
} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("around()....");
}
public void afterReturn(){
System.out.println("afterReturn()......");
}
}
----------------------------------------------被代理类proxy.spring.agent.MySinger-----------------（著名的歌手）--------------------
package proxy.spring.agent;
public class MySinger {
public void sing(){
System.out.println("我唱歌");
}
public String ss(String name){
System.out.println("MySinger"+"...."+name);
return name;
}
}
--------------------------------测试--------main------------------
package proxy.spring.agent;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
public static void main(String[] args) {
ApplicationContext app =
new ClassPathXmlApplicationContext("proxy/spring/agent/application.xml");
MySinger singer =(MySinger)app.getBean("singer");
singer.sing();
System.out.println("main"+"...."+ singer.ss("周杰伦"));
}
}
--------------------结果-------------------
before()........
我唱歌
after()......
afterReturn()......
around()....
before()........
周杰伦
MySinger....周杰伦
after()......
afterReturn()......
around()....
main....null
-----------------------------------------------------------下篇文章用注解
