Spring4学习笔记-AOP(基于配置文件的方式)
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1 2 3 4 5 6 7 8 9 10 11 | 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); } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | 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; } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | 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; } } |
1 2 3 4 5 6 7 8 9 10 11 12 | 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())); } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | <? 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 > |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | 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); } } |
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