这篇文章主要介绍了spring boot 防止重复提交实现方法,结合实例形式详细分析了spring boot 防止重复提交具体配置、实现方法及操作注意事项,需要的朋友可以参考下
本文实例讲述了spring boot 防止重复提交实现方法。分享给大家供大家参考，具体如下：
服务器端实现方案:同一客户端在2秒内对同一URL的提交视为重复提交
上代码吧
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 防重复提交 * @date 2018-08-26 */ @SpringBootApplication public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } } 自定义注解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) // 运行时有效 /** * @功能描述 防止重复提交标记注解 * @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) {// 如果缓存中有这个url视为重复提交 Object o = pjp.proceed(); cache.put(key, 0); return o; } else { logger.error("重复提交"); return null; } } catch (Throwable e) { e.printStackTrace(); logger.error("验证重复提交时出现未知异常!"); return "{\"code\":-889,\"message\":\"验证重复提交时出现未知异常!\"}"; } } } 缓存类
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 内存缓存 * @author www.gaozz.club * @date 2018-08-26 */ public class UrlCache { @Bean public Cache getCache() { return CacheBuilder.newBuilder().expireAfterWrite(2L, TimeUnit.SECONDS).build();// 缓存有效期为2秒 } } 测试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 测试Controller * @author www.gaozz.club * @date 2018-08-26 */ @RestController public class TestController { @RequestMapping("/test") @NoRepeatSubmit public String test() { return ("程序逻辑返回"); } } 浏览器输入http://localhost:8080/test
然后F5刷新查看效果
以下为新版内容:解决了程序集群部署时请求可能会落到多台机器上的问题,把内存缓存换成了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; @Configuration public 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; } } 调整切面类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) {// 如果缓存中有这个url视为重复提交 Object o = pjp.proceed(); opsForValue.set(key, 0, 2, TimeUnit.SECONDS); return o; } else { logger.error("重复提交"); return null; } } catch (Throwable e) { e.printStackTrace(); logger.error("验证重复提交时出现未知异常!"); return "{\"code\":-889,\"message\":\"验证重复提交时出现未知异常!\"}"; } } } 更多关于java相关内容感兴趣的读者可查看本站专题：《Spring框架入门与进阶教程》、《Java数据结构与算法教程》、《Java操作DOM节点技巧总结》、《Java文件与目录操作技巧汇总》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
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