SSH与SSM学习之Spring16——Spring中AOP之使用配置文件配置
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2022-05-24 23:47:16
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SSH与SSM学习之Spring16——Spring中AOP之使用配置文件配置
一、说明
Spring中使用AOP主要就是配置目标类,通知类,和织入。代理类如何创建之类的不用我们关心,因为Spring已经弄好了。
下面我们来看一下我们搞一把。
二、导包
除了之前使用的包外,下载还需要导入一下包。
- 导入 Spring 的aop包
spring-aop-4.3.9.RELEASE.jar
spring-aspects-4.3.9.RELEASE.jar
- 导入 Spring 需要的第三方 aop 包
com.springsource.org.aopalliance-1.0.0.jar
com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar
三、创建目标类
这个目标类我们创建了一个接口和一个实现类。
3.1 UserService 接口
package com.qwm.spring2.service;
/**
* @author:qiwenming
* @date:2017/10/25 0025 23:08
* @description:
*/
public interface UserService {
void saveUser();
void deleteUser();
void updateUser();
void findUser();
}
3.2 UserServiceImpl 目标类
package com.qwm.spring2.service;
/**
* @author:qiwenming
* @date:2017/10/25 0025 23:07
* @description:
*/
public class UserServiceImpl implements UserService {
@Override
public void saveUser() {
System.out.println("--保存用户--");
}
@Override
public void deleteUser() {
System.out.println("--删除用户--");
//为了测试异常通知,弄出一异常
int i = 1 / 0;
}
@Override
public void updateUser() {
System.out.println("--更新用户--");
}
@Override
public void findUser() {
System.out.println("--查找用户--");
}
}
四、MyAdvice 通知类
package com.qwm.spring2.f_aopxml;
import org.aspectj.lang.ProceedingJoinPoint;
/**
* @author:qiwenming
* @date:2017/10/25 0025 23:10
* @description:
* 通知类
*/
public class MyAdvice {
//前置通知
//指定该方法是前置通知,并制定切入点
public void before(){
System.out.println("这是前置通知!!");
}
//后置通知
public void afterReturning(){
System.out.println("这是后置通知(如果出现异常不会调用)!!");
}
//环绕通知
public Object around(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("这是环绕通知之前的部分!!");
Object proceed = pjp.proceed();//调用目标方法
System.out.println("这是环绕通知之后的部分!!");
return proceed;
}
//异常通知
public void afterException(){
System.out.println("出事啦!出现异常了!!");
}
//后置通知
public void after(){
System.out.println("这是后置通知(出现异常也会调用)!!");
}
}
五、applicationContext.xml 配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd ">
<!--1.配置目标对象-->
<bean name="userService" class="com.qwm.spring2.service.UserServiceImpl"/>
<!--2.配置通知-->
<bean name="myAdvice" class="com.qwm.spring2.f_aopxml.MyAdvice"/>
<!--3.织入-->
<aop:config>
<!--切入点-->
<!--切入点配置说明
切入点配置需要使用 execution()
下面这个是配置 UserServiceImpl的saveUser方法
public void com.qwm.spring2.service.UserServiceImpl.saveUser()
public可以省略
void com.qwm.spring2.service.UserServiceImpl.saveUser()
可以使用 * 表示指定返回值
* com.qwm.spring2.service.UserServiceImpl.saveUser()
可以使用 * 表示配置所有方法
* com.qwm.spring2.service.UserServiceImpl.*()
可以使用 * 表示匹配指定的类 (只会匹配 service包下的类)
* com.qwm.spring2.service.*ServiceImpl.*()
可以使用 .. 表示匹配子包已经子子包(会匹配 service包下以及所有子包的类)
* com.qwm.spring2.service..*ServiceImpl.*()
-->
<aop:pointcut id="pc" expression="execution(* com.qwm.spring2.service.*ServiceImpl.*())"/>
<!--织入通知-->
<aop:aspect ref="myAdvice">
<!--前置通知-->
<aop:before method="before" pointcut-ref="pc"/>
<!--后置通知-->
<aop:after-returning method="afterReturning" pointcut-ref="pc"/>
<!--环绕通知-->
<aop:around method="around" pointcut-ref="pc"/>
<!--异常拦截通知-->
<aop:after-throwing method="afterException" pointcut-ref="pc"/>
<!--后置通知-->
<aop:after method="after" pointcut-ref="pc"/>
</aop:aspect>
</aop:config>
</beans>
六、AopXmlTest 测试
package com.qwm.spring2.f_aopxml;
import com.qwm.spring2.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import javax.annotation.Resource;
/**
* @author:qiwenming
* @date:2017/10/25 0025 23:38
* @description:
* Aop xml 配置测试
*/
//帮我们创建容器
@RunWith(SpringJUnit4ClassRunner.class)
//指定创建容器时使用哪个配置文件
@ContextConfiguration("classpath:com/qwm/spring2/f_aopxml/applicationContext.xml")
public class AopXmlTest {
@Resource(name = "userService")
public UserService us;
@Test
public void test1(){
us.saveUser();
}
@Test
public void test2(){
us.deleteUser();
}
}
测试test1的结果是
这是前置通知!!
这是环绕通知之前的部分!!
--保存用户--
这是后置通知(出现异常也会调用)!!
这是环绕通知之后的部分!!
这是后置通知(如果出现异常不会调用)!!
测试test2的结果是
这是前置通知!!
这是环绕通知之前的部分!!
--删除用户--
这是后置通知(出现异常也会调用)!!
出事啦!出现异常了!!
java.lang.ArithmeticException: / by zero
at com.qwm.spring2.service.UserServiceImpl.deleteUser(UserServiceImpl.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:47)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:62)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
at com.qwm.spring2.f_aopxml.MyAdvice.around(MyAdvice.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629)
at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618)
at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
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.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy13.deleteUser(Unknown Source)
at com.qwm.spring2.f_aopxml.AopXmlTest.test2(AopXmlTest.java:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
七、源码下载
https://github.com/wimingxxx/spring01/tree/master/src/com/qwm/spring2/f_aopxml
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