SpringBoot防止重复请求，重复表单提交超级简单的注解实现

1.注解接口

/**
 * @description 防止表单重复提交注解
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@Documented
public @interface DuplicateSubmitToken {

    //保存重复提交标记 默认为需要保存
    boolean save() default true;
}
2.定义异常类


/**
 * 重复提交异常
 */
public class DuplicateSubmitException extends RuntimeException {
    public DuplicateSubmitException(String msg) {
        super(msg);
    }

    public DuplicateSubmitException(String msg, Throwable cause) {
        super(msg, cause);
    }
}


3.拦截器

/**
 * @description 防止表单重复提交拦截器
 */
@Aspect
@Component
@Slf4j
public class DuplicateSubmitAspect {
    public static final String DUPLICATE_TOKEN_KEY = "duplicate_token_key";

    @Pointcut("execution(public * cn.test.core.controller..*(..))")

    public void webLog() {
    }

    @Before("webLog() && @annotation(token)")
    public void before(final JoinPoint joinPoint, DuplicateSubmitToken token) {
        if (token != null) {
            Object[] args = joinPoint.getArgs();
            HttpServletRequest request = null;
            HttpServletResponse response = null;
            for (int i = 0; i < args.length; i++) {
                if (args[i] instanceof HttpServletRequest) {
                    request = (HttpServletRequest) args[i];
                }
                if (args[i] instanceof HttpServletResponse) {
                    response = (HttpServletResponse) args[i];
                }
            }

            boolean isSaveSession = token.save();
            if (isSaveSession) {
                String key = getDuplicateTokenKey(joinPoint);
                Object t = request.getSession().getAttribute(key);
                if (null == t) {
                    String uuid = UUID.randomUUID().toString();
                    request.getSession().setAttribute(key.toString(), uuid);
                    log.info("token-key=" + key);
                    log.info("token-value=" + uuid.toString());
                } else {
                    throw new DuplicateSubmitException(TextConstants.REQUEST_REPEAT);
                }
            }

        }
    }

    /**
     * 获取重复提交key-->duplicate_token_key+','+请求方法名
     *
     * @param joinPoint
     * @return
     */
    public String getDuplicateTokenKey(JoinPoint joinPoint) {
        String methodName = joinPoint.getSignature().getName();
        StringBuilder key = new StringBuilder(DUPLICATE_TOKEN_KEY);
        key.append(",").append(methodName);
        return key.toString();
    }

    @AfterReturning("webLog() && @annotation(token)")
    public void doAfterReturning(JoinPoint joinPoint, DuplicateSubmitToken token) {
        // 处理完请求，返回内容
        log.info("出来方法：");
        if (token != null) {
            Object[] args = joinPoint.getArgs();
            HttpServletRequest request = null;
            for (int i = 0; i < args.length; i++) {
                if (args[i] instanceof HttpServletRequest) {
                    request = (HttpServletRequest) args[i];
                }
            }
            boolean isSaveSession = token.save();
            if (isSaveSession) {
                String key = getDuplicateTokenKey(joinPoint);
                Object t = request.getSession().getAttribute(key);
                if (null != t) {
                    //方法执行完毕移除请求重复标记
                    request.getSession(false).removeAttribute(key);
                    log.info("方法执行完毕移除请求重复标记！");
                }
            }
        }
    }

    /**
     * 异常
     *
     * @param joinPoint
     * @param e
     */
    @AfterThrowing(pointcut = "webLog()&& @annotation(token)", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Throwable e, DuplicateSubmitToken token) {
        if (null != token
                && e instanceof DuplicateSubmitException == false) {
            //处理处理重复提交本身之外的异常
            Object[] args = joinPoint.getArgs();
            HttpServletRequest request = null;
            for (int i = 0; i < args.length; i++) {
                if (args[i] instanceof HttpServletRequest) {
                    request = (HttpServletRequest) args[i];
                }
            }
            boolean isSaveSession = token.save();
            //获得方法名称
            if (isSaveSession) {
                String key = getDuplicateTokenKey(joinPoint);
                Object t = request.getSession().getAttribute(key);
                if (null != t) {
                    //方法执行完毕移除请求重复标记
                    request.getSession(false).removeAttribute(key);
                    log.info("异常情况--移除请求重复标记！");
                }
            }
        }
    }
}
4.控制器 使用方法：在你想要避免重复提交的控制器方法添加注解

@DuplicateSubmitToken即可
/**
 * @description
 */
@RestController
public class TestController {
    @RequestMapping(value = "/test", method = RequestMethod.GET)
    public Map<String, Object> firstResp(HttpServletRequest request) {
        Map<String, Object> map = new HashMap<>();
        request.getSession().setAttribute("request Url", request.getRequestURL());
        map.put("request Url", request.getRequestURL());
        return map;
    }

    @DuplicateSubmitToken
    @RequestMapping(value = "/test/d", method = RequestMethod.GET)
    public Map<String, Object> test(HttpServletRequest request) {

        Random r = new Random();
        int i = r.nextInt(3);
        if (i == 2) {
            throw new CustomException("有异常");
        }

        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        Map<String, Object> map = new HashMap<>();
        request.getSession().setAttribute("request Url", request.getRequestURL());
        map.put("request Url", request.getRequestURL());
        return map;
    }
}
5.测试略过。。。