SpringBoot AOP @Around

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
</dependencies>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.nhooo</groupId>
<artifactId>aop-around-advice-example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>aop-around-advice-example</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

package com.nhooo.service;
import org.springframework.stereotype.Service;
@Service
public class BankService 
{
public void displayBalance(String accNum) 
{
System.out.println("Inside displayBalance() method");
if(accNum.equals("12345")) 
{
System.out.println("Total balance: 10,000");
}
else 
{
System.out.println("Sorry! wrong account number.");
}
}
}

package com.nhooo.aspect;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
//在應(yīng)用程序中啟用spring AOP功能
@Aspect
@Component
public class BankAspect
{
    //顯示所有可用的方法，即將為所有方法調(diào)用通知
    @Pointcut(value= "execution(* com.nhooo.service.BankService.*(..))")
    private void logDisplayingBalance() 
    { 
    }
    //聲明在方法與切入點表達式匹配之前和之后應(yīng)用的 around 通知
    @Around(value= "logDisplayingBalance()")
    public void aroundAdvice(ProceedingJoinPoint jp) throws Throwable 
    {
        System.out.println("方法調(diào)用前的aroundAdvice()方法" + jp.getSignature().getName() + " method");
        try 
        {
            jp.proceed();
        } 
        finally 
        {
        }
        System.out.println("方法調(diào)用后的aroundAdvice()方法" + jp.getSignature().getName() + " method");
    }
}

package com.nhooo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import com.nhooo.service.BankService;
@SpringBootApplication
//@EnableAspectJAutoProxy 注解支持處理標記為@Aspect annotation的組件。它類似于xml配置中的標記。
@EnableAspectJAutoProxy
public class AopAroundAdviceExampleApplication 
{
    public static void main(String[] args) 
    {
    ConfigurableApplicationContext context = SpringApplication.run(AopAroundAdviceExampleApplication.class, args);
    //從應(yīng)用程序上下文獲取employee對象。
    BankService bank = context.getBean(BankService.class);
    //顯示帳戶余額
    String accnumber = "12345";
    bank.displayBalance(accnumber);
    //關(guān)閉context對象
    context.close();
    }
}