當交易由Action進入Service之前，需要根據不同的Service實際負責業務的不同，真正執行Service的業務邏輯之前，做一些檢查工作。這樣的攔截器應該是基於配置的，與Service關聯起來的。

/**
 * @author wangxin
 * @contact [email protected]
 * @date Jul 22, 2017 
 * @Description: 所有TransactionController的抽象父類，主要作用為以一種低耦合的方式調用Service
 */
public abstract class BaseController {
    
 
private final Logger log = LoggerFactory.getLogger(getClass());
    @SuppressWarnings("rawtypes")
    public Map callService(String service,Map request) {
        Class<?> clazz;
        try {
            clazz = Class.forName("com.springbank.service.service." + service);
            Method method 
 
= clazz.getMethod("execute", Map.class);
            Service bean = (Service) ApplicationContextUtil.getApplicationContext().getBean(clazz);
            //先執行攔截器棧
            List<Interceptor> interceptorList = (List<Interceptor>) clazz.getMethod("getInterceptorList", null).invoke(bean, null
 
);
            for (Interceptor interceptor : interceptorList) {
                interceptor.process();
            }
            //反射非靜態方法，需要把第一個參數設置為對象
            return (Map)method.invoke(bean, request);
        } catch (ClassNotFoundException e) {
            ExceptionHandler.throwExcep(ExpceptionMapping.SYSTEMERR, e);
        } catch (NoSuchMethodException e) {
            ExceptionHandler.throwExcep(ExpceptionMapping.SYSTEMERR, e);
        } catch (SecurityException e) {
            ExceptionHandler.throwExcep(ExpceptionMapping.SYSTEMERR, e);
        } catch (IllegalAccessException e) {
            ExceptionHandler.throwExcep(ExpceptionMapping.SYSTEMERR, e);
        } catch (IllegalArgumentException e) {
            ExceptionHandler.throwExcep(ExpceptionMapping.SYSTEMERR, e);
        } catch (InvocationTargetException e) {
            ExceptionHandler.throwExcep(ExpceptionMapping.SYSTEMERR, e);
        }
        return null;
    }
}

SpringBank 開發日誌 一種簡單的攔截器設計實現