java redis防止重复提交请求_spring boot 防止重复提交
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
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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
logback.xml
%d[%F:%L][%p]:%m%n
Application.javapackage 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
*/@SpringBootApplicationpublic class Application { public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
自定义注解NoRepeatSubmit.javapackage 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.javapackage 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Controllerpackage 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
*/@RestControllerpublic class TestController {
@RequestMapping("/test")
@NoRepeatSubmit
public String test() { return ("程序逻辑返回");
}
}
然后F5刷新查看效果
QQ图片20180914165017.png
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.ymlspring: redis: host: 192.168.1.92
port: 6379 password: 123456
RedisConfig.javapackage 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;
}
}
作者：不知不怪
链接：https://www.jianshu.com/p/09c6b05b670a