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>
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
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!\"}";
}
}
}
https://github.com/gzz2017gzz/spring-boot2-example/tree/master/54-spring-boot-repeat-submit-single
另附:
