spring boot 防止重复提交

以你之姓@ 2022-12-08 05:17 197阅读 0赞

# 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/> 
        </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>

## logback.xml ##

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>
        <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>%d[%F:%L][%p]:%m%n</pattern>
            </encoder>
        </appender>
        <root level="info">
            <appender-ref ref="STDOUT"/>
        </root>
    </configuration>

## 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<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
     */
    @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][http_localhost_8080_test] ##

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.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
        <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!\"}";
            }
    
        }
    
    }

[http_localhost_8080_test]: https://links.jianshu.com/go?to=http%3A%2F%2Flocalhost%3A8080%2Ftest