**

 * ErrorCode:

 *

 * @author yangzhenlong

 * @since 2016/7/21

 */

@Target({ElementType.METHOD})

@Retention(RetentionPolicy.RUNTIME)

@Documented

@Inherited

public @interface ErrorException {

    int code() default 0;//参数

}

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Aspect拦截注解类

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/**

 * ErrorExceptionAspect:

 *

 * @author yangzhenlong

 * @since 2016/7/21

 */

@Component

@Aspect

public class ErrorExceptionAspect {

    //@Before("execution(* com.sarkuya.service..*.*(..))")

    @Pointcut(value = "@annotation(com.mlxs.mvc.anno.ErrorException)")

    private void pointcut() {

    }

    @Around(value = "pointcut() && @annotation(errorExecption)")

    public Object around(ProceedingJoinPoint point, ErrorException errorExecption){

        System.out.println("---->around");

        //注解参数

        System.out.println("注解参数："+ errorExecption.code());

        //当前拦截的类和方法：

        Class clazz = point.getTarget().getClass();

        Method method = ((MethodSignature) point.getSignature()).getMethod();

        String codeName = clazz.getSimpleName()+"_"+method.getName();

        System.out.println("query param---->"+codeName);

        //方法返回结果

        Object result = null;

        Object args = Arrays.asList(point.getArgs());

        try {

            //执行方法（可以在方法前后添加前置和后置通知）

            result = point.proceed();

            //校验结果

            result = validateResult(result);

        } catch (Throwable e) {

            //记录日志

            System.out.println(codeName + "()方法异常：" + e);

            //打印堆栈信息

            e.printStackTrace();

            //设置返回信息

            result = "结果：抛了异常了。。-----------------------"+e.getMessage()+"，原因："+e.getCause();

        }

        //返回通知

        return result;

    }

    /**

     * 方法执行后

     * @param joinPoint

     * @param result

     */

    @AfterReturning(value = "pointcut() && @annotation(errorExecption)", returning = "result")

    public Object afterReturning(JoinPoint joinPoint, ErrorException errorExecption,  Object result){

        System.out.println("---->afterReturning");

        String methodName = joinPoint.getSignature().getName();

        System.out.println("The method " + methodName + " return with " + result);

        if(result instanceof Boolean){

            if(!((Boolean) result)){

                result = "error----result is false";

            }

        }else{

            if(result == null){

                result = "error----result is null";

            }

        }

        return result;

    }

    /**

     * 方法执行后

     * @param joinPoint

     * @param ex

     */

    @AfterThrowing(value = "pointcut() && @annotation(errorExecption)", throwing = "ex")

    public void afterThrowing(JoinPoint joinPoint, ErrorException errorExecption, Exception ex){

        System.out.println("eeeee--->afterThrowing");

        String methodName = joinPoint.getSignature().getName();

        System.out.println("The method " + methodName + "occurs exception: " + ex);

    }

    private Object validateResult(Object result){

        if(result instanceof Boolean){

            if(!((Boolean) result)){

                System.out.println("error----result is false");

                result = "error:false";

            }

        }else{

            if(result == null){

                System.out.println("error----result is null");

                result = "error:null";

            }

        }

        return result;

    }

}

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测试：

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/**

 * _Test:

 *

 * @author yangzhenlong

 * @since 2016/7/21

 */

@Component("test")

public class _Test {

    public static void main(String[] args) {

        ApplicationContext context =

                new ClassPathXmlApplicationContext("classpath*:spring/applicationContext.xml");

        _Test obj = (_Test) context.getBean("test");

        System.out.println("==========>"+obj.test());

        //System.out.println("==========>"+obj.test2());

    }

    @ErrorException(code = 100)

    public Object test(){

        System.out.println("---test---");

        int a = 10/0;

        return 20;

    }

    @ErrorException(code = 22)

    public Object test2(){

        System.out.println("---test2---");

        //int a = 10/0;

        return false;

    }

}