使用Spring AOP注解方式实现表单重复提交验证功能

防重复提交常见解决方案：http://patrick002.iteye.com/blog/2197521

定义注解

 

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface FormRepeatSubmitValidation {
	
	String value() default "表单重复提交验证";
}

 

定义切面

 

 

@Aspect
@Component
public class FormRepeatSubmitAspect {
	/**
	 * 日志记录
	 */
	private static final Logger logger = LoggerFactory.getLogger(FormRepeatSubmitAspect.class);
	
	@Autowired
	private RedisTemplate<String, Object> redisTemplate;
	
	/**
	 * 定义切入点
	 */
	@Pointcut("@annotation(com.geekymv.FormRepeatSubmitValidation)")
	public void doAspect() {
	}
	
	@Before("doAspect()")
	public void doBefore(JoinPoint pjp) {
		Object[] args = pjp.getArgs();
		MethodSignature signature = (MethodSignature) pjp.getSignature();
		Method method = signature.getMethod();
		Object target = pjp.getTarget();
		String params = JSON.toJSONString(args);
		if(logger.isDebugEnabled()) {
			logger.debug("before methodName: {}", method.getName());
			logger.debug("before args: {}", params);
			logger.debug("before target: {}", target);
		}
		boolean flag = method.isAnnotationPresent(FormRepeatSubmitValidation.class) ;    
		if(flag) {
			FormRepeatSubmitValidation formRepeatSubmitValidation = method.getAnnotation(FormRepeatSubmitValidation.class);
			logger.info("FormRepeatSubmitValidation-->{}", formRepeatSubmitValidation.value());
			
			// 将入参作为key自增值存入redis
			ValueOperations<String, Object> value = redisTemplate.opsForValue();
			Long result = value.increment(params, 1);
			// 判断返回值是否大于1，如果是则重复提交
			if(result > 1) {
				throw new BaseException(ErrorMessage.FORM_REPEAT_SUBMIT);
			}
			redisTemplate.expire(params, 5, TimeUnit.SECONDS); // 设置过期时间5秒
		}
		
	}
	
	@After("doAspect()")
	public void doAfter(JoinPoint pjp) {
		Object[] args = pjp.getArgs();
		MethodSignature signature = (MethodSignature) pjp.getSignature();
		Method method = signature.getMethod();
		Object target = pjp.getTarget();
		String params = JSON.toJSONString(args);
		if(logger.isDebugEnabled()) {
			logger.debug("after methodName: {}", method.getName());
			logger.debug("after args: {}", params);
			logger.debug("after target: {}", target);
		}
		boolean flag = method.isAnnotationPresent(FormRepeatSubmitValidation.class) ;    
		if(flag) {
			// 清除redis中key为入参的数据，对于引用类型的变量有可能在业务代码中被修改
			redisTemplate.delete(params);
		}
	}
	
}

添加配置spring-aop.xml

 

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

	<!-- 启动@AspectJ支持 -->
	<aop:aspectj-autoproxy expose-proxy="true" proxy-target-class="true" />

</beans>

 

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