Java框架：AOP--Schema

http://blog.youkuaiyun.com/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;

@Component
public class XiaoBaiImpl implements IPerson {

	@Override
	public void addPerson() {
		System.out.println("add小白！");
	}

	@Override
	public void updatePerson() {
		System.out.println("update小白！");
	}

	@Override
	public 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;

@Component
public 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;

@Component
public 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;

@Component
public class MethodInterceptorAdvice implements MethodInterceptor{

	@Override
	public 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:fyl
MethodInterceptor开启...
添加Num
MethodInterceptor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...null
Exception in thread "main" com.aop.schema.CustomException
	at 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)