AOP - Advisor

1. 定義通知

   public class LoggingAdvice implements MethodInterceptor {
       @Override
       public Object invoke(MethodInvocation invocation) throws Throwable {
           System.out.println("Method " + invocation.getMethod().getName() + " is being called");
           return invocation.proceed(); // 繼續執行目標方法
       }
   }
   

2. 定義切點

   public class LoggingPointcut implements Pointcut {
       @Override
       public ClassFilter getClassFilter() {
           return ClassFilter.TRUE; // 適用於所有類
       }
   
       @Override
       public MethodMatcher getMethodMatcher() {
           return new NameMatchMethodMatcher() {
               @Override
               public boolean matches(String methodName, Class<?> targetClass) {
                   return methodName.startsWith("get"); // 適用於所有以 "get" 開頭的方法
               }
           };
       }
   }
   

3. 定義切面類

   public class LoggingAdvisor extends DefaultPointcutAdvisor {
       public LoggingAdvisor() {
           super(new LoggingPointcut(), new LoggingAdvice());
       }
   }
   

4. 註冊切面

   @Configuration
   public class AopConfig {
       @Bean
       public LoggingAdvisor loggingAdvisor() {
           return new LoggingAdvisor();
       }
   }