JAVA AOP防止重复提交

水深无声 2023-01-06 01:21 187阅读 0赞

通过Aop进行防止重复提交， 把 pds-sessionId-请求路径作为请求的唯一key,用户发送请求时，判断key是否存在，如果存在则重复提交，不存在，则进行保存，执行完后或者出现异常进行清除。

key 超时5秒自动清除

一.自定义注解

import java.lang.annotation.ElementType;
    import java.lang.annotation.Retention;
    import java.lang.annotation.RetentionPolicy;
    import java.lang.annotation.Target;
    
    /**
     * 防止重复提交标记注解
     *
     * @author liuqiyu
     */
    @Target(ElementType.METHOD) // 作用到方法上
    @Retention(RetentionPolicy.RUNTIME) // 运行时有效
    public @interface PreventDuplicateSubmit {
    
    }

二.定义AOP 进行处理

import com.qike.base.PreventDuplicateSubmit;
    import com.qike.exception.GlobalRuntimeException;
    import com.qike.security.session.RedisCacheManager;
    import lombok.extern.slf4j.Slf4j;
    import org.aspectj.lang.ProceedingJoinPoint;
    import org.aspectj.lang.annotation.AfterThrowing;
    import org.aspectj.lang.annotation.Around;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Pointcut;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    import org.springframework.web.context.request.RequestContextHolder;
    import org.springframework.web.context.request.ServletRequestAttributes;
    
    import javax.servlet.http.HttpServletRequest;
    import java.util.Objects;
    
    /**
     * 防止重复提交切面
     *
     * @author: liuqiyu
     * @date: 2021/1/13
     * @version: 1.0
     */
    @Slf4j
    @Aspect
    @Component
    public class PreventDuplicateSubmitAop {
    
        @Autowired
        RedisCacheManager redisCacheManager;
    
        @Pointcut("execution(public * com.qike..*.*(..))")
        public void preventDuplicateSubmit() {
    
        }
    
        @Around("preventDuplicateSubmit() && @annotation(pds)")
        public Object around(ProceedingJoinPoint pjp, PreventDuplicateSubmit pds) throws Throwable {
            log.info("进行防重复提交");
            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            String sessionId = Objects.requireNonNull(RequestContextHolder.getRequestAttributes()).getSessionId();
            HttpServletRequest request = attributes.getRequest();
            String key = "pds-" + sessionId + "-" + request.getServletPath();
            // 如果缓存中有这个url视为重复提交
            if (redisCacheManager.get(key) == null) {
                redisCacheManager.set(key, "0",5);
                Object o = pjp.proceed();
                redisCacheManager.del(key);
                return o;
            } else {
                log.error("重复提交");
                throw new GlobalRuntimeException(300,"重复提交");
            }
        }
    
        @AfterThrowing(pointcut = "preventDuplicateSubmit() && @annotation(pds)", throwing = "e")
        public void doAfterThrowing(Throwable e, PreventDuplicateSubmit pds) {
            log.error("异常解除防重复提交");
            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            String sessionId = Objects.requireNonNull(RequestContextHolder.getRequestAttributes()).getSessionId();
            HttpServletRequest request = attributes.getRequest();
            String key = "pds-" + sessionId + "-" + request.getServletPath();
            redisCacheManager.del(key);
        }
    }