Spring AOP - 每个带有注释的方法的切入点

java
public class LogAspect {
    
    public Object logExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {
        long startTime = System.currentTimeMillis();
        
        Object result = joinPoint.proceed();
        
        long endTime = System.currentTimeMillis();
        long executionTime = endTime - startTime;
        
        System.out.println("方法执行时间：" + executionTime + "毫秒");
        
        return result;
    }
}

java
public class UserService {
    
    @LogExecutionTime
    public void addUser(User user) {
        // 添加用户的逻辑
    }
    
    @LogExecutionTime
    public void deleteUser(int userId) {
        // 删除用户的逻辑
    }
    
    public void updateUser(User user) {
        // 更新用户的逻辑
    }
}
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface LogExecutionTime {
    // 定义注释的属性，可根据实际需求添加
}
public class LogAspect {
    
    public Object logExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {
        long startTime = System.currentTimeMillis();
        
        Object result = joinPoint.proceed();
        
        long endTime = System.currentTimeMillis();
        long executionTime = endTime - startTime;
        
        System.out.println("方法执行时间：" + executionTime + "毫秒");
        
        return result;
    }
}
@Configuration
@EnableAspectJAutoProxy
public class AppConfig {
    
    @Bean
    public UserService userService() {
        return new UserService();
    }
    
    @Bean
    public LogAspect logAspect() {
        return new LogAspect();
    }
    
    @Bean
    public Advisor logAdvisor() {
        AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
        pointcut.setExpression("@annotation(com.example.LogExecutionTime)");
        
        return new DefaultPointcutAdvisor(pointcut, logAspect());
    }
}
public class Main {
    
    public static void main(String[] args) {
        ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
        UserService userService = context.getBean(UserService.class);
        
        userService.addUser(new User("John"));
        userService.deleteUser(1);
        userService.updateUser(new User("Tom"));
    }
}