Spring4学习笔记-AOP（基于配置文件的方式）

引入的jar包与基于注解的方式引入的jar包相同



ArithmeticCalculator接口

package com.spring.aop.impl.xml;

public interface ArithmeticCalculator {
public int add(int i, int j);

public int sub(int i, int j);

public int mul(int i, int j);

public int div(int i, int j);
}

接口实现类 ArithmeticCalculatorImpl.java

package com.spring.aop.impl.xml;

public class ArithmeticCalculatorImpl implements ArithmeticCalculator{

@Override
public int add(int i, int j) {
int result = i + j;
return result;
}

@Override
public int sub(int i, int j) {
int result = i - j;
return result;
}

@Override
public int mul(int i, int j) {
int result = i * j;
return result;
}

@Override
public int div(int i, int j) {
int result = i / j;
return result;
}

}

切面类 LoggingAspect.java

package com.spring.aop.impl.xml;

import java.util.Arrays;
import java.util.List;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;

public class LoggingAspect {

public void beforeMethod(JoinPoint joinpoint) {
String methodName = joinpoint.getSignature().getName();
List<Object>args = Arrays.asList(joinpoint.getArgs());
System.out.println("前置通知：The method "+ methodName +" begins with " + args);
}

public void afterMethod(JoinPoint joinpoint) {
String methodName = joinpoint.getSignature().getName();
//List<Object>args = Arrays.asList(joinpoint.getArgs());  后置通知方法中可以获取到参数
System.out.println("后置通知：The method "+ methodName +" ends ");
}

public void afterReturnning(JoinPoint joinpoint, Object result) {
String methodName = joinpoint.getSignature().getName();
System.out.println("返回通知：The method "+ methodName +" ends with " + result);
}

public void afterThrowing(JoinPoint joinpoint, Exception e) {
String methodName = joinpoint.getSignature().getName();
System.out.println("异常通知：The method "+ methodName +" occurs exception " + e);
}

public Object aroundMethod(ProceedingJoinPoint point) {
Object result = null;
String methodName = point.getSignature().getName();
try {
//前置通知
System.out.println("The method "+ methodName +" begins with " + Arrays.asList(point.getArgs()));
//执行目标方法
result = point.proceed();
//翻译通知
System.out.println("The method "+ methodName +" ends with " + result);
} catch (Throwable e) {
//异常通知
System.out.println("The method "+ methodName +" occurs exception " + e);
throw new RuntimeException(e);
}
//后置通知
System.out.println("The method "+ methodName +" ends");
return result;
}
}

切面类 ValidationAspect.java

package com.spring.aop.impl.xml;

import java.util.Arrays;

import org.aspectj.lang.JoinPoint;

public class ValidationAspect {

public void validateArgs(JoinPoint joinPoint) {
System.out.println("validate:" + Arrays.asList(joinPoint.getArgs()));
}
}

applicationContext-xml.xml

<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd"> 
<!-- 配置bean -->
<bean id="arithmeticCalculator" class="com.spring.aop.impl.xml.ArithmeticCalculatorImpl"></bean>
<!-- 配置切面的bean -->
<bean id="loggingAspect" class="com.spring.aop.impl.xml.LoggingAspect"></bean>

<bean id="validationAspect" class="com.spring.aop.impl.xml.ValidationAspect"></bean>

<!-- 配置AOP -->
<aop:config>
<!-- 配置切点表达式 -->
<aop:pointcut expression="execution(* com.spring.aop.impl.xml.ArithmeticCalculator.*(..))" id="pointcut"/>
<!-- 配置切面及通知，使用order指定优先级 -->
<aop:aspect ref="loggingAspect" order="1">
<!-- 环绕通知 -->
<!--
<aop:around method="aroundMethod" pointcut-ref="pointcut"/>
-->
<!-- 前置通知 -->
<aop:before method="beforeMethod" pointcut-ref="pointcut"/>
<!-- 后置通知 -->
<aop:after method="afterMethod" pointcut-ref="pointcut"/>
<!-- 异常通知 -->
<aop:after-throwing method="afterThrowing"  pointcut-ref="pointcut" throwing="e"/>
<!-- 返回通知 -->
<aop:after-returning method="afterReturnning" pointcut-ref="pointcut" returning="result"/>

</aop:aspect>
<aop:aspect ref="validationAspect" order="2">
<!-- 前置通知 -->
<aop:before method="validateArgs" pointcut-ref="pointcut"/>
</aop:aspect>
</aop:config>
</beans>

Main.java

package com.spring.aop.impl.xml;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {
public static void main(String[] args) {
//创建spring IOC容器
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext-xml.xml");
//从IOC容器中获取bean实例
ArithmeticCalculator arithmeticCalculator = applicationContext.getBean(ArithmeticCalculator.class);
int result = arithmeticCalculator.add(4, 6);
System.out.println(result);
result = arithmeticCalculator.sub(4, 6);
System.out.println(result);
System.out.println(result);
result = arithmeticCalculator.mul(4, 6);
System.out.println(result);
System.out.println(result);
result = arithmeticCalculator.div(4, 0);
System.out.println(result);
}
}

源码 http://yunpan.cn/cgsrQHmUvrIQt 提取码 6564
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