在傳統(tǒng)的web項(xiàng)目中,防止重復(fù)提交,通常做法是:后端生成一個(gè)唯一的提交令牌(uuid),并存儲(chǔ)在服務(wù)端。頁(yè)面提交請(qǐng)求攜帶這個(gè)提交令牌,后端驗(yàn)證并在第一次驗(yàn)證后刪除該令牌,保證提交請(qǐng)求的唯一性。
從事服務(wù)器托管,服務(wù)器租用,云主機(jī),網(wǎng)站空間,域名注冊(cè),CDN,網(wǎng)絡(luò)代維等服務(wù)。
上述的思路其實(shí)沒(méi)有問(wèn)題的,但是需要前后端都稍加改動(dòng),如果在業(yè)務(wù)開(kāi)發(fā)完在加這個(gè)的話,改動(dòng)量未免有些大了,本節(jié)的實(shí)現(xiàn)方案無(wú)需前端配合,純后端處理。
思路
關(guān)于Redis 分布式鎖
不了解的同學(xué)戳這里 ==> Redis分布式鎖的正確實(shí)現(xiàn)方式
使用Redis 是為了在負(fù)載均衡部署,如果是單機(jī)的部署的項(xiàng)目可以使用一個(gè)線程安全的本地Cache 替代 Redis
Code
這里只貼出 AOP 類(lèi)和測(cè)試類(lèi),完整代碼見(jiàn) ==> Gitee
@Aspect @Component public class RepeatSubmitAspect { private static final Logger LOGGER = LoggerFactory.getLogger(RepeatSubmitAspect.class); @Autowired private RedisLock redisLock; @Pointcut("@annotation(com.gitee.taven.aop.NoRepeatSubmit)") public void pointCut() {} @Around("pointCut()") public Object before(ProceedingJoinPoint pjp) { try { HttpServletRequest request = RequestUtils.getRequest(); Assert.notNull(request, "request can not null"); // 此處可以用token或者JSessionId String token = request.getHeader("Authorization"); String path = request.getServletPath(); String key = getKey(token, path); String clientId = getClientId(); boolean isSuccess = redisLock.tryLock(key, clientId, 10); LOGGER.info("tryLock key = [{}], clientId = [{}]", key, clientId); if (isSuccess) { LOGGER.info("tryLock success, key = [{}], clientId = [{}]", key, clientId); // 獲取鎖成功, 執(zhí)行進(jìn)程 Object result = pjp.proceed(); // 解鎖 redisLock.releaseLock(key, clientId); LOGGER.info("releaseLock success, key = [{}], clientId = [{}]", key, clientId); return result; } else { // 獲取鎖失敗,認(rèn)為是重復(fù)提交的請(qǐng)求 LOGGER.info("tryLock fail, key = [{}]", key); return new ApiResult(200, "重復(fù)請(qǐng)求,請(qǐng)稍后再試", null); } } catch (Throwable throwable) { throwable.printStackTrace(); } return new ApiResult(500, "系統(tǒng)異常", null); } private String getKey(String token, String path) { return token + path; } private String getClientId() { return UUID.randomUUID().toString(); } }
多線程測(cè)試
測(cè)試代碼如下,模擬十個(gè)請(qǐng)求并發(fā)同時(shí)提交
@Component public class RunTest implements ApplicationRunner { private static final Logger LOGGER = LoggerFactory.getLogger(RunTest.class); @Autowired private RestTemplate restTemplate; @Override public void run(ApplicationArguments args) throws Exception { System.out.println("執(zhí)行多線程測(cè)試"); String url="http://localhost:8000/submit"; CountDownLatch countDownLatch = new CountDownLatch(1); ExecutorService executorService = Executors.newFixedThreadPool(10); for(int i=0; i<10; i++){ String userId = "userId" + i; HttpEntity request = buildRequest(userId); executorService.submit(() -> { try { countDownLatch.await(); System.out.println("Thread:"+Thread.currentThread().getName()+", time:"+System.currentTimeMillis()); ResponseEntity<String> response = restTemplate.postForEntity(url, request, String.class); System.out.println("Thread:"+Thread.currentThread().getName() + "," + response.getBody()); } catch (InterruptedException e) { e.printStackTrace(); } }); } countDownLatch.countDown(); } private HttpEntity buildRequest(String userId) { HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_JSON); headers.set("Authorization", "yourToken"); Map<String, Object> body = new HashMap<>(); body.put("userId", userId); return new HttpEntity<>(body, headers); } }
成功防止重復(fù)提交,控制臺(tái)日志如下,可以看到十個(gè)線程的啟動(dòng)時(shí)間幾乎同時(shí)發(fā)起,只有一個(gè)請(qǐng)求提交成功了
本節(jié)demo
戳這里 ==> Gitee
build項(xiàng)目之后,啟動(dòng)本地redis,運(yùn)行項(xiàng)目自動(dòng)執(zhí)行測(cè)試方法
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持創(chuàng)新互聯(lián)。
文章名稱(chēng):SpringBoot使用AOP防止重復(fù)提交的方法示例
當(dāng)前鏈接:http://jinyejixie.com/article40/pgegeo.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供軟件開(kāi)發(fā)、網(wǎng)站維護(hù)、商城網(wǎng)站、網(wǎng)站設(shè)計(jì)公司、微信小程序、網(wǎng)站制作
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶(hù)投稿、用戶(hù)轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請(qǐng)盡快告知,我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如需處理請(qǐng)聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時(shí)需注明來(lái)源: 創(chuàng)新互聯(lián)