Question

我正在尝试运行Spring in Action本书中的示例Spring AOP演示程序，以学习AOP概念。我在程序下运行时得到IllegalArgumentException。有人可以帮我了解这里有什么问题吗。

Performance.java

const GraphkManagementClient = require('azure-graph');
const client = new GraphkManagementClient(credentials, subscriptionId);
return client.users.get(principalID);

DancePerformance.java

compileSdkVersion 28
targetSdkVersion   28
buildToolsVersion  28.0.3
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support:appcompat-v7:28.0.0'

CircusPerformance.java

package com.aop.annotations.example2;

public interface Performance {

    public void perform() throws Exception;
}

Audience.java

package com.aop.annotations.example2;

public class DancePerformance implements Performance{

    @Override
    public void perform() throws Exception{
        System.out.println("DancePerformance started...");      
    }
}

TestAOPMain.java

package com.aop.annotations.example2;

public class CircusPerformance implements Performance {

    @Override
    public void perform() throws Exception {
        System.out.println("Circus Performance started... ");
        throw new Exception("CircusException occurred");
    }
}

appContext2.xml

package com.aop.annotations.example2;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class Audience {

    @Pointcut("execution(* com.aop.annotations.example2.Performance.perform(..))")
    public void performance() {
    }

    @Before("performance")
    public void silenceCellPhones() {
        System.out.println("Silence cell phones");
    }

    @Before("performance")
    public void takeSeats() {
        System.out.println("Taking seats");
    }

    @AfterReturning("performance")
    public void applause() {
        System.out.println("CLAP CLAP CLAP!!!");
    }

    @AfterThrowing("performance")
    public void demandRefund() {
        System.out.println("Demanding a refund");
    }
}

例外：

package com.aop.annotations.example2;

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

public class TestAOPMain {

    public static void main(String args[]) {
        try {
            ApplicationContext context = new ClassPathXmlApplicationContext("appContext2.xml");
            Performance dancePerformance = context.getBean("dance", DancePerformance.class);
            dancePerformance.perform();

            Performance circusPerformance = (CircusPerformance) context.getBean("circus");
            circusPerformance.perform();

        } catch (Exception e) {
            System.out.println(e.getMessage());
        }

    }

}

Answer 1

在性能@Before内添加（），@ AfterReturning和@AfterThrowing批注解决了该问题。

@Before("performance()")

@Before("performance()")

@AfterReturning("performance()")

@AfterThrowing("performance()")

Spring AOP：获取异常java.lang.IllegalArgumentException：切入点格式不正确：在字符位置0处期望'（'

1 个答案: