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      springboot中如何防止重復(fù)提交

      springboot中如何防止重復(fù)提交,相信很多沒有經(jīng)驗(yàn)的人對此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個問題。

      創(chuàng)新互聯(lián)公司憑借在網(wǎng)站建設(shè)、網(wǎng)站推廣領(lǐng)域領(lǐng)先的技術(shù)能力和多年的行業(yè)經(jīng)驗(yàn),為客戶提供超值的營銷型網(wǎng)站建設(shè)服務(wù),我們始終認(rèn)為:好的營銷型網(wǎng)站就是好的業(yè)務(wù)員。我們已成功為企業(yè)單位、個人等客戶提供了成都網(wǎng)站制作、網(wǎng)站建設(shè)服務(wù),以良好的商業(yè)信譽(yù),完善的服務(wù)及深厚的技術(shù)力量處于同行領(lǐng)先地位。

      服務(wù)器端實(shí)現(xiàn)方案:同一客戶端在2秒內(nèi)對同一URL的提交視為重復(fù)提交

      上代碼吧

      pom.xml

      4.0.0 com.example springboot-repeat-submit 1.0 jar  org.springframework.boot  spring-boot-starter-parent  2.0.4.RELEASE    UTF-8  UTF-8  1.8     org.springframework.boot   spring-boot-starter-web       org.springframework.boot   spring-boot-starter-aop       com.google.guava   guava   24.0-jre          org.springframework.boot    spring-boot-maven-plugin    

      Application.java

      package com;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;/** * @author www.gaozz.club * @功能描述 防重復(fù)提交 * @date 2018-08-26 */@SpringBootApplicationpublic class Application { public static void main(String[] args) {  SpringApplication.run(Application.class, args); }}

      自定義注解NoRepeatSubmit.java

      package com.common;import java.lang.annotation.ElementType;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;@Target(ElementType.METHOD) // 作用到方法上@Retention(RetentionPolicy.RUNTIME) // 運(yùn)行時有效/** * @功能描述 防止重復(fù)提交標(biāo)記注解 * @author www.gaozz.club * @date 2018-08-26 */public @interface NoRepeatSubmit {}

      aop解析注解NoRepeatSubmitAop.java

      package com.common;import javax.servlet.http.HttpServletRequest;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;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 com.google.common.cache.Cache;@Aspect@Component/** * @功能描述 aop解析注解 * @author www.gaozz.club * @date 2018-08-26 */public class NoRepeatSubmitAop { private Log logger = LogFactory.getLog(getClass()); @Autowired private Cache cache; @Around("execution(* com.example..*Controller.*(..)) && @annotation(nrs)") public Object arround(ProceedingJoinPoint pjp, NoRepeatSubmit nrs) {  try {   ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();   String sessionId = RequestContextHolder.getRequestAttributes().getSessionId();   HttpServletRequest request = attributes.getRequest();   String key = sessionId + "-" + request.getServletPath();   if (cache.getIfPresent(key) == null) {// 如果緩存中有這個url視為重復(fù)提交    Object o = pjp.proceed();    cache.put(key, 0);    return o;   } else {    logger.error("重復(fù)提交");    return null;   }  } catch (Throwable e) {   e.printStackTrace();   logger.error("驗(yàn)證重復(fù)提交時出現(xiàn)未知異常!");   return "{\"code\":-889,\"message\":\"驗(yàn)證重復(fù)提交時出現(xiàn)未知異常!\"}";  } }}

      緩存類

      package com.common;import java.util.concurrent.TimeUnit;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.google.common.cache.Cache;import com.google.common.cache.CacheBuilder;@Configuration/** * @功能描述 內(nèi)存緩存 * @author www.gaozz.club * @date 2018-08-26 */public class UrlCache { @Bean public Cache getCache() {  return CacheBuilder.newBuilder().expireAfterWrite(2L, TimeUnit.SECONDS).build();// 緩存有效期為2秒 }}

      測試Controller

      package com.example;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import com.common.NoRepeatSubmit;/** * @功能描述 測試Controller * @author www.gaozz.club * @date 2018-08-26 */@RestControllerpublic class TestController { @RequestMapping("/test") @NoRepeatSubmit public String test() {  return ("程序邏輯返回"); }}

      瀏覽器輸入http://localhost:8080/test

      然后F5刷新查看效果

      以下為新版內(nèi)容:解決了程序集群部署時請求可能會落到多臺機(jī)器上的問題,把內(nèi)存緩存換成了redis

      application.yml

      spring: redis: host: 192.168.1.92 port: 6379 password: 123456

      RedisConfig.java

      package com.common;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.data.redis.connection.RedisStandaloneConfiguration;import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;import org.springframework.data.redis.core.RedisTemplate;@Configurationpublic class RedisConfig { @Bean @ConfigurationProperties(prefix = "spring.redis") public JedisConnectionFactory getConnectionFactory() {  return new JedisConnectionFactory(new RedisStandaloneConfiguration(), JedisClientConfiguration.builder().build()); } @Bean RedisTemplate getRedisTemplate() {  RedisTemplate redisTemplate = new RedisTemplate();  redisTemplate.setConnectionFactory(getConnectionFactory());  return redisTemplate; }}

      調(diào)整切面類NoRepeatSubmitAop.java

      package com.common;import javax.servlet.http.HttpServletRequest;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.data.redis.core.ValueOperations;import org.springframework.stereotype.Component;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;@Aspect@Component/** * @功能描述 aop解析注解 * @author www.gaozz.club * @date 2018-11-02 */public class NoRepeatSubmitAop { private Log logger = LogFactory.getLog(getClass()); @Autowired private RedisTemplate template; @Around("execution(* com.example..*Controller.*(..)) && @annotation(nrs)") public Object arround(ProceedingJoinPoint pjp, NoRepeatSubmit nrs) {  ValueOperations opsForValue = template.opsForValue();  try {   ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();   String sessionId = RequestContextHolder.getRequestAttributes().getSessionId();   HttpServletRequest request = attributes.getRequest();   String key = sessionId + "-" + request.getServletPath();   if (opsForValue.get(key) == null) {// 如果緩存中有這個url視為重復(fù)提交    Object o = pjp.proceed();    opsForValue.set(key, 0, 2, TimeUnit.SECONDS);    return o;   } else {    logger.error("重復(fù)提交");    return null;   }  } catch (Throwable e) {   e.printStackTrace();   logger.error("驗(yàn)證重復(fù)提交時出現(xiàn)未知異常!");   return "{\"code\":-889,\"message\":\"驗(yàn)證重復(fù)提交時出現(xiàn)未知異常!\"}";  } }}

      看完上述內(nèi)容,你們掌握springboot中如何防止重復(fù)提交的方法了嗎?如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道,感謝各位的閱讀!


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