1.可以使用@Order注解指定切面的优先级，值越小优先级越高

 

示例：

VlidationAspect.java：

1 package com.hk.spring.aop.notice; 2  3 import java.util.Arrays; 4  5 import org.aopalliance.intercept.Joinpoint; 6 import org.aspectj.lang.JoinPoint; 7 import org.aspectj.lang.annotation.Aspect; 8 import org.aspectj.lang.annotation.Before; 9 import org.springframework.core.annotation.Order;10 import org.springframework.stereotype.Component;11 12 @Order(1)13 @Aspect14 @Component15 public class VlidationAspect {16     17     @Before("execution(public int com.hk.spring.aop.notice.ArithmeticCalculator.*(..))")18     public void validateArgs(JoinPoint joinPoint){19         System.out.println("-->validate:" + Arrays.asList(joinPoint.getArgs()));20     }21 22 }

 

1 package com.hk.spring.aop.notice; 2  3 import java.util.Arrays; 4  5 import org.aopalliance.intercept.Joinpoint; 6 import org.aspectj.lang.JoinPoint; 7 import org.aspectj.lang.ProceedingJoinPoint; 8 import org.aspectj.lang.annotation.AfterReturning; 9 import org.aspectj.lang.annotation.AfterThrowing;10 import org.aspectj.lang.annotation.Around;11 import org.aspectj.lang.annotation.Aspect;12 import org.aspectj.lang.annotation.Before;13 import org.springframework.core.annotation.Order;14 import org.springframework.stereotype.Component;15 16 @Order(2)17 @Aspect18 @Component19 public class LoggingAspect {20     /*21      * 在方法正常执行后执行的通知叫返回通知22      * 返回通知是可以访问到方法的返回值的23      */24 //    @AfterReturning(value="execution(public int com.hk.spring.aop.notice.ArithmeticCalculator.*(..))",25 //                    returning="result")26 //    public void afterReturning(JoinPoint joinPoint,Object result){27 //        String methodName = joinPoint.getSignature().getName();28 //        System.out.println("The method " + methodName + " ends with " + result);29 //    }30     31     /*32      * 在目标方法出现异常时，会执行代码。33      * 可以访问到异常对象；且可以指定在出现特定异常时在执行通知34      */35 //    @AfterThrowing(value="execution(public int com.hk.spring.aop.notice.ArithmeticCalculator.*(..))",36 //                   throwing="ex")37 //    public void afterThrowing(JoinPoint joinPoint,Exception ex){38 //        String methodName = joinPoint.getSignature().getName();39 //        System.out.println("The method " + methodName + " coours exception : " + ex);40 //    }41     42     /*43      * 环绕通知需要携带ProceedingJoinPoint 类型的参数44      * 环绕通知类似于动态代理的全过程：ProceedingJoinPoint这个类型的参数可以决定是否执行目标方法45      * 且环绕通知必须有返回值，返回值即为目标方法的返回值46      */47     @Around("execution(public int com.hk.spring.aop.notice.ArithmeticCalculator.*(..))")48     public Object aroundMethod(ProceedingJoinPoint pjd){49         50         Object result = null;51         String methodName = pjd.getSignature().getName();52         53         //执行目标方法54         try {55             //前置通知56             System.out.println("The method " + methodName + "begins with " + Arrays.asList(pjd.getArgs()));57             result = pjd.proceed();58             //后置通知59             System.out.println("The method " + methodName + "ends with " + result);60         } catch (Throwable e) {61             //异常通知62             System.out.println("The method occurs exception:" + e);63         }64         //后置通知65         System.out.println("The method " + methodName + " ends");66         return result;67     }68 }

 

Main.java：

1 package com.hk.spring.aop.notice; 2  3 import org.springframework.context.ApplicationContext; 4 import org.springframework.context.support.ClassPathXmlApplicationContext; 5  6 public class Main { 7  8     public static void main(String[] args) { 9         ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");10         ArithmeticCalculator arithmeticCalculator = (ArithmeticCalculator) ctx.getBean("ArithmeticCalculator");11         12         System.out.println(arithmeticCalculator.getClass().getName());13         14         int result = arithmeticCalculator.add(1, 2);15         System.out.println("result: " + result);16         17         result = arithmeticCalculator.div(1000, 10);18         System.out.println("result " + result);19 20     }21 22 }

 

运行结果：

 

由结果可以看出，验证切面优先于日志切面。