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
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>springboot-repeat-submit</artifactId> <version>1.0</version> <packaging>jar</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>24.0-jre</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>
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 */@SpringBootApplicationpublic 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<String, Integer> 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<String, Integer> 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 */@RestControllerpublic 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;@Configurationpublic class RedisConfig { @Bean @ConfigurationProperties(prefix = "spring.redis") public JedisConnectionFactory getConnectionFactory() { return new JedisConnectionFactory(new RedisStandaloneConfiguration(), JedisClientConfiguration.builder().build()); } @Bean <K, V> RedisTemplate<K, V> getRedisTemplate() { RedisTemplate<K, V> redisTemplate = new RedisTemplate<K, V>(); 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<String, Integer> template; @Around("execution(* com.example..*Controller.*(..)) && @annotation(nrs)") public Object arround(ProceedingJoinPoint pjp, NoRepeatSubmit nrs) { ValueOperations<String, Integer> 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!\"}"; } }}
附：GitHub源码地址：https://github.com/gzz2017gzz/spring-boot2-example/tree/master/54-spring-boot-repeat-submit-single
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