Spring_7AOP之Advice应用
Posted charles999
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Spring学习（21）--- AOP之Advice应用（上） 出处：http://www.cnblogs.com/JsonShare
| 前置通知（Before advice） | 在某个连接点（join point）之前执行的通知，但不能阻止连接点前的执行（除非它抛出异常） |
| 返回后通知（After returning advice） | 在某个连接点（join point）正常完成后执行的通知 |
| 抛出异常后通知（After throwing advice） | 在方法抛出异常退出时执行的通知 |
| 后通知（After(finally) advice） | 当某个连接点退出的时候执行的通知（无论是正常返回还是异常退出） |
| 环绕通知（Around advice） | 包围一个连接点（join point）的通知 |
导入需要的包：aspectjweaver.jar、aopalliance-1.0.jar
（一）Before Advice
例子：
新建两个类：
package com.aop.schema;
/**
*
* 切面类
*
*/
public class MyAspect {
public void before(){
System.out.println("MyAspect.before");
}
}
package com.aop.schema;
/**
*
* 业务类
*
*/
public class ApsectBiz {
public void biz(){
System.out.println("ApsectBiz.biz");
}
}
XML配置：
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
<bean id="myAspect" class="com.aop.schema.MyAspect"></bean>
<bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean>
<aop:config>
<aop:aspect id="myAspectAOP" ref="myAspect">
<aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" />
<aop:before method="before" pointcut-ref="myPointcut"/>
</aop:aspect>
</aop:config>
</beans>
单元测试：
package com.aop.schema;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class UnitTest {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring-aop.xml");
ApsectBiz biz = (ApsectBiz)context.getBean("apsectBiz");
biz.biz();
}
}
结果：
七月 09, 2015 10:30:24 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@31b3c607: startup date [Thu Jul 09 22:30:24 CST 2015]; root of context hierarchy 七月 09, 2015 10:30:24 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring-aop.xml] MyAspect.before ApsectBiz.biz
PS：ApsectBiz.biz是业务方法，在它之前，执行了前置通知MyAspect.before，符合想要的结果
（二）After returning advice
例子：
修改一下切面类MyAspect（添加afterreturning方法）：
package com.aop.schema;
/**
*
* 切面类
*
*/
public class MyAspect {
public void before(){
System.out.println("MyAspect.before");
}
public void afterreturning(){
System.out.println("MyAspect.afterreturning");
}
}
XML配置修改为：
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
<bean id="myAspect" class="com.aop.schema.MyAspect"></bean>
<bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean>
<aop:config>
<aop:aspect id="myAspectAOP" ref="myAspect">
<aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" />
<aop:before method="before" pointcut-ref="myPointcut"/>
<aop:after-returning method="afterreturning" pointcut-ref="myPointcut"/>
</aop:aspect>
</aop:config>
</beans>
单元测试同上：
结果：
七月 09, 2015 10:38:41 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@31b3c607: startup date [Thu Jul 09 22:38:41 CST 2015]; root of context hierarchy 七月 09, 2015 10:38:41 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring-aop.xml] MyAspect.before ApsectBiz.biz MyAspect.afterreturning
（三）After throwing advice
说明：使用throwing属性来指定可被传递的异常的参数名称
例子：
修改一下切面类MyAspect（添加afterthrowing方法）：
package com.aop.schema;
/**
*
* 切面类
*
*/
public class MyAspect {
public void before(){
System.out.println("MyAspect.before");
}
public void afterreturning(){
System.out.println("MyAspect.afterreturning");
}
public void afterthrowing(){
System.out.println("MyAspect.afterthrowing");
}
}
修改业务类ApsectBiz（抛出一个异常）：
package com.aop.schema;
/**
*
* 业务类
*
*/
public class ApsectBiz {
public void biz(){
System.out.println("ApsectBiz.biz");
throw new RuntimeException(); //故意抛出异常
}
}
XML配置：
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
<bean id="myAspect" class="com.aop.schema.MyAspect"></bean>
<bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean>
<aop:config>
<aop:aspect id="myAspectAOP" ref="myAspect">
<aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" />
<aop:before method="before" pointcut-ref="myPointcut"/>
<aop:after-returning method="afterreturning" pointcut-ref="myPointcut"/>
<aop:after-throwing method="afterthrowing" pointcut-ref="myPointcut"/>
</aop:aspect>
</aop:config>
</beans>
单元测试同上：
测试结果：
七月 09, 2015 10:47:46 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@31b3c607: startup date [Thu Jul 09 22:47:46 CST 2015]; root of context hierarchy 七月 09, 2015 10:47:46 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring-aop.xml] MyAspect.before ApsectBiz.biz MyAspect.afterthrowing
PS：有没有发现有什么问题？ MyAspect.afterreturning没有了，biz()中抛出异常，biz()方法没有正常返回，所以MyAspect.afterreturning没有了。
（四）After（finally） advice
修改一下切面类MyAspect（添加after方法）：
package com.aop.schema;
/**
*
* 切面类
*
*/
public class MyAspect {
public void before(){
System.out.println("MyAspect.before");
}
public void afterreturning(){
System.out.println("MyAspect.afterreturning");
}
public void afterthrowing(){
System.out.println("MyAspect.afterthrowing");
}
public void after(){
System.out.println("MyAspect.after");
}
}
XML配置：
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
<bean id="myAspect" class="com.aop.schema.MyAspect"></bean>
<bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean>
<aop:config>
<aop:aspect id="myAspectAOP" ref="myAspect">
<aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" />
<aop:before method="before" pointcut-ref="myPointcut"/>
<aop:after-returning method="afterreturning" pointcut-ref="myPointcut"/>
<aop:after-throwing method="afterthrowing" pointcut-ref="myPointcut"/>
<aop:after method="after" pointcut-ref="myPointcut"/>
</aop:aspect>
</aop:config>
</beans>
单元测试同上：
结果：
七月 09, 2015 10:56:10 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@31b3c607: startup date [Thu Jul 09 22:56:10 CST 2015]; root of context hierarchy 七月 09, 2015 10:56:10 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring-aop.xml] MyAspect.before ApsectBiz.biz MyAspect.afterthrowing MyAspect.after
（五）Around advice
注意：通知方法的第一个参数必ProceedingJoinPoint类型
例子：
修改一下切面类MyAspect（添加around方法）：
package com.aop.schema;
import org.aspectj.lang.ProceedingJoinPoint;
/**
*
* 切面类
*
*/
public class MyAspect {
public void before(){
System.out.println("MyAspect.before");
}
public void afterreturning(){
System.out.println("MyAspect.afterreturning");
}
public void afterthrowing(){
System.out.println("MyAspect.afterthrowing");
}
public void after(){
System.out.println("MyAspect.after");
}
public void around(ProceedingJoinPoint pjp) throws Throwable{
System.out.println("MyAspect.around_1");
Object obj=pjp.proceed();
System.out.println("MyAspect.around_2");
}
}
XML配置：
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
<bean id="myAspect" class="com.aop.schema.MyAspect"></bean>
<bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean>
<aop:config>
<aop:aspect id="myAspectAOP" ref="myAspect">
<aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" />
<aop:before method="before" pointcut-ref="myPointcut"/>
<aop:after-returning method="afterreturning" pointcut-ref="myPointcut"/>
<aop:after-throwing method="afterthrowing" pointcut-ref="myPointcut"/>
<aop:after method="after" pointcut-ref="myPointcut"/>
<aop:around method="around" pointcut-ref="myPointcut"/>
</aop:aspect>
</aop:config>
</beans>
单元测试同上：
结果：
七月 09, 2015 11:15:20 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@31b3c607: startup date [Thu Jul 09 23:15:20 CST 2015]; root of context hierarchy
七月 09, 2015 11:15:20 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [spring-aop.xml]
MyAspect.before
MyAspect.around_1
ApsectBiz.biz
java.lang.RuntimeException
at com.aop.schema.ApsectBiz.biz(ApsectBiz.java:11)
at com.aop.schema.ApsectBiz$$FastClassBySpringCGLIB$$ae10254d.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
at com.aop.schema.MyAspect.around(MyAspect.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:43)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:58)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)
at com.aop.schema.ApsectBiz$$EnhancerBySpringCGLIB$$1fbf7bae.biz(<generated>)
at com.aop.schema.UnitTest.test(UnitTest.java:13)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
MyAspect.after
MyAspect.afterreturning
PS：有异常，仔细看，原来是around(ProceedingJoinPoint pjp)的try catch捕捉到了biz（）抛出的异常，现在把异常注释掉（try catch里面怎么处理异常？这里要看具体的业务需要，这里先注释掉）
package com.aop.schema;
/**
*
* 业务类
*
*/
public class ApsectBiz {
public void biz(){
System.out.println("ApsectBiz.biz");
//throw new RuntimeException(); //故意抛出异常
}
}
测试结果：
七月 09, 2015 11:18:17 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@31b3c607: startup date [Thu Jul 09 23:18:17 CST 2015]; root of context hierarchy 七月 09, 2015 11:18:17 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring-aop.xml] MyAspect.before MyAspect.around_1 ApsectBiz.biz MyAspect.around_2 MyAspect.after MyAspect.afterreturning
Spring学习（22）--- AOP之Advice应用（下）
（六）Advice parameters（advice带参数的情况）
例子：
修改MyAspect（添加around_init方法）：
1 package com.aop.schema; 2 3 import org.aspectj.lang.ProceedingJoinPoint; 4 5 /** 6 * 7 * 切面类 8 * 9 */ 10 public class MyAspect { 11 12 public void before(){ 13 System.out.println("MyAspect.before"); 14 } 15 16 public void afterreturning(){ 17 System.out.println("MyAspect.afterreturning"); 18 } 19 20 public void afterthrowing(){ 21 System.out.println("MyAspect.afterthrowing"); 22 } 23 24 public void after(){ 25 System.out.println("MyAspect.after"); 26 } 27 28 public void around(ProceedingJoinPoint pjp) { 29 try { 30 System.out.println("MyAspect.around_1"); 31 Object obj=pjp.proceed(); 32 System.out.println("MyAspect.around_2"); 33 } catch (Throwable e) { 34 e.printStackTrace(); 35 } 36 } 37 38 public void around_init(ProceedingJoinPoint pjp,String name,int age) { 39 System.out.println(name+" "+age); 40 try { 41 System.out.println("MyAspect.around_1"); 42 Object obj=pjp.proceed(); 43 System.out.println("MyAspect.around_2"); 44 } catch (Throwable e) { 45 e.printStackTrace(); 46 } 47 } 48 }
修改ApsectBiz类（添加init方法）：
1 package com.aop.schema; 2 /** 3 * 4 * 业务类 5 * 6 */ 7 public class ApsectBiz { 8 9 public void biz(){ 10 System.out.println("ApsectBiz.biz"); 11 //throw new RuntimeException(); //故意抛出异常 12 } 13 14 public void init(String name,int age){ 15 System.out.println("ApsectBiz.init : "+ name +" " +age); 16 } 17 }
XML配置：
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:aop="http://www.springframework.org/schema/aop" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xsi:schemaLocation="http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans-4.1.xsd 8 http://www.springframework.org/schema/context 9 http://www.springframework.org/schema/context/spring-context-4.1.xsd 10 http://www.springframework.org/schema/aop 11 http://www.springframework.org/schema/aop/spring-aop-4.1.xsd"> 12 13 <bean id="myAspect" class="com.aop.schema.MyAspect"></bean> 14 15 <bean id="apsectBiz" class="com.aop.schema.ApsectBiz"></bean> 16 17 <aop:config> 18 <aop:aspect id="myAspectAOP" ref="myAspect"> 19 <!-- 先注释掉，便于观察结果 20 <aop:pointcut id="myPointcut" expression="execution(* com.aop.schema.ApsectBiz.*(..))" /> 21 <aop:before method="before" pointcut-ref="myPointcut"/> 22 <aop:after-returning method="afterreturning" pointcut-ref="myPointcut"/> 23 <aop:after-throwing method="afterthrowing" pointcut-ref="myPointcut"/> 24 <aop:after method="after" pointcut-ref="myPointcut"/> 25 <aop:around method="around" pointcut-ref="myPointcut"/> 26 --> 27 28 <aop:around method="around_init" pointcut="execution(* com.aop.schema.ApsectBiz.init(String,int)) and args(name,age)"/> 29 </aop:aspect> 30 </aop:config> 31 32 </beans>
单元测试：
package com.aop.schema;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class UnitTest {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring-aop.xml");
ApsectBiz biz = (ApsectBiz)context.getBean("apsectBiz");
biz.init("Json",25);
}
}
结果：
七月 09, 2015 11:48:42 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@118e0f0f: startup date [Thu Jul 09 23:48:42 CST 2015]; root of context hierarchy 七月 09, 2015 11:48:42 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring-aop.xml] Json 25 MyAspect.around_1 ApsectBiz.init : Json 25 MyAspect.around_2
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