使用spring aspect控制自定义注解详解编程语言

/** 
 * ErrorCode: 
 * 
 * @author yangzhenlong 
 * @since 2016/7/21 
 */ 
@Target({ElementType.METHOD}) 
@Retention(RetentionPolicy.RUNTIME) 
@Documented 
@Inherited 
public @interface ErrorException { 
    int code() default 0;//参数 
}

/** 
 * 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; 
    } 
}

/** 
 * _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; 
    } 
 
}

---->around 
注解参数：100 
query param---->_Test_test 
---test--- 
_Test_test()方法异常：java.lang.ArithmeticException: / by zero 
---->afterReturning 
The method test return with 结果：抛了异常了。。-----------------------/ by zero，原因：null 
==========>结果：抛了异常了。。-----------------------/ by zero，原因：null 
java.lang.ArithmeticException: / by zero 
    at com.mlxs.mvc.anno._Test.test(_Test.java:28) 
    at com.mlxs.mvc.anno._Test$$FastClassBySpringCGLIB$$cc5ae48c.invoke(<generated>) 
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) 
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) 
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) 
    at com.mlxs.mvc.anno.ErrorExceptionAspect.around(ErrorExceptionAspect.java:44) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621) 
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610) 
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168) 
    at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168) 
    at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:58) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168) 
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653) 
    at com.mlxs.mvc.anno._Test$$EnhancerBySpringCGLIB$$cbf2effd.test(<generated>) 
    at com.mlxs.mvc.anno._Test.main(_Test.java:21) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)