Java框架：AOP--Schema

http://blog.csdn.net/qq_34120041/article/details/53817252

常用的AOP两种方式：

1、Scheme-AOP-配置文件的切面

2、@Aspectj -基于注解

案例：配置文件的切面

1、接口IPerson和实现类XiaoBaiImpl

package com.aop.schema;public interface IPerson {public void addPerson();public void addNum(int num,String name);public void updatePerson();}

package com.aop.schema;import org.springframework.stereotype.Component;@Componentpublic class XiaoBaiImpl implements IPerson {@Overridepublic void addPerson() {System.out.println("add小白！");}@Overridepublic void updatePerson() {System.out.println("update小白！");}@Overridepublic void addNum(int num, String name) {System.out.println("添加Num");}public void del() {try {XiaoBaiImpl xiaoBaiImpl = null;xiaoBaiImpl.addNum(1, "fyl");} catch (RuntimeException e) {throw new CustomException(XiaoBaiImpl.class, "del", e.getMessage());}}}

2、前置通知、环绕通知

package com.aop.schema;import org.aspectj.lang.ProceedingJoinPoint;import org.springframework.stereotype.Component;@Componentpublic class AroundMethod {public void aroundAdvice(ProceedingJoinPoint joinPoint) throws Throwable {System.out.println("事务开启了......");joinPoint.proceed();System.out.println("事务结束了.......");}public void beforeAdvice() {System.out.println("我是前置通知！！");}}

3、自定义异常类CustomException、异常通知AroundThrowingMethod

package com.aop.schema;public class CustomException extends RuntimeException {private static final long serialVersionUID = 8308193234255898346L;private Class clz;private String method;public CustomException() {super();}public Class getClz() {return clz;}public void setClz(Class clz) {this.clz = clz;}public String getMethod() {return method;}public void setMethod(String method) {this.method = method;}public CustomException(Class clz, String method, String message) {super(message);this.clz = clz;this.method = method;}public CustomException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {super(message, cause, enableSuppression, writableStackTrace);}public CustomException(String message, Throwable cause) {super(message, cause);}public CustomException(String message) {super(message);}public CustomException(Throwable cause) {super(cause);}}

package com.aop.schema;import org.springframework.stereotype.Component;@Componentpublic class AroundThrowingMethod {public void aroundThrowAdvice(CustomException ce) throws Throwable{System.out.println("抛异常的类是："+ce.getClz().getName());System.out.println("抛异常的方法是："+ce.getMethod());System.out.println("事務回滾..."+ce.getMessage());}}

4、spring 2.5 通知类MethodInterceptorAdvice

package com.aop.schema;import java.lang.reflect.Method;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;import org.springframework.stereotype.Component;@Componentpublic class MethodInterceptorAdvice implements MethodInterceptor{@Overridepublic Object invoke(MethodInvocation invocation) throws Throwable {//执行的类System.out.println("执行的类:"+invocation.getThis().getClass().getName());//获取方法名Method method = invocation.getMethod();System.out.println("执行的方法:"+method.getName());//获取参数Object[] params = invocation.getArguments();if (params != null) {for (int i = 0; i < params.length; i++) {System.out.println("参数"+i+"值为:"+String.valueOf(params[i]));}}System.out.println("MethodInterceptor开启...");long btime = System.currentTimeMillis();//执行具体的方法Object obj = invocation.proceed();System.out.println("MethodInterceptor结束...");long etime = System.currentTimeMillis() - btime;System.out.println("=========共耗时："+etime+"ms");return obj;}}

5、bean.xml

<!-- 扫包 --><context:component-scan base-package="com.aop.schema"></context:component-scan><!-- 1:Scheme-AOP-配置文件的切面2:@Aspectj aop --><aop:config proxy-target-class="true"><aop:pointcut expression="execution(* add*(..))" id="before"/><!-- 通知类 :前置通知，后置通知，环绕通知，异常通知，引介通知(针对（对象）)--><aop:aspect ref="aroundMethod"><!-- 环绕通知-方法aroundAdvice --><aop:around method="aroundAdvice" pointcut="execution(* update*(..))"/><!-- 前置通知-方法beforeAdvice --><aop:before method="beforeAdvice" pointcut-ref="before"/></aop:aspect><aop:aspect ref="aroundThrowingMethod"><!-- 异常通知-方法beforeAdvice --><aop:after-throwing method="aroundThrowAdvice" pointcut="execution(* del*(..))" throwing="ce"/></aop:aspect></aop:config><!-- schemeaop + springaop2.5x 环绕型通知 --><aop:config proxy-target-class="true"><aop:advisor advice-ref="methodInterceptorAdvice" pointcut="execution(* com.aop.schema.XiaoBaiImpl.addN*(..))"/></aop:config>

6、测试类

package com.aop.schema;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Test {public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("classpath:com/aop/schema/bean.xml");XiaoBaiImpl xiaoBaiImpl = (XiaoBaiImpl) context.getBean("xiaoBaiImpl");xiaoBaiImpl.addPerson();System.out.println("------------------------------");xiaoBaiImpl.updatePerson();System.out.println("------------------------------");xiaoBaiImpl.addNum(12, "fyl");System.out.println("------------------------------");xiaoBaiImpl.del();}}

7、结果

一月 05, 2017 3:08:38 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@4ccabbaa: startup date [Thu Jan 05 15:08:38 CST 2017]; root of context hierarchy一月 05, 2017 3:08:38 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions信息: Loading XML bean definitions from class path resource [com/aop/schema/bean.xml]我是前置通知！！   --前置通知add小白！------------------------------事务开启了......   --环绕通知update小白！事务结束了.......------------------------------我是前置通知！！   --前置通知执行的类:com.aop.schema.XiaoBaiImpl  --MethodInterceptor执行的方法:addNum参数0值为:12参数1值为:fylMethodInterceptor开启...添加NumMethodInterceptor结束...=========共耗时：1ms------------------------------抛异常的类是：com.aop.schema.XiaoBaiImpl抛异常的方法是：del事務回滾...nullException in thread "main" com.aop.schema.CustomExceptionat com.aop.schema.XiaoBaiImpl.del(XiaoBaiImpl.java:28)at com.aop.schema.XiaoBaiImpl$$FastClassBySpringCGLIB$$cf1f1ef7.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:58)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)at com.aop.schema.XiaoBaiImpl$$EnhancerBySpringCGLIB$$2d1b53f8.del(<generated>)at com.aop.schema.Test.main(Test.java:17)