public interface UserService { String getUsername(); } public class UserServiceImpl implements UserService { @Override public String getUsername() { return "John Doe"; } } @Aspect public class LoggingAspect { @Before("execution(* com.example.UserService.getUsername())") public void logBefore(JoinPoint joinPoint) { System.out.println("Before method: " + joinPoint.getSignature().getName()); } } @Configuration public class AopConfig { @Bean public UserService userService() { return MatrixAopProxyFactory.createProxy(new UserServiceImpl()); } @Bean public LoggingAspect loggingAspect() { return new LoggingAspect(); } }


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