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-submit1.0 jar org.springframework.boot spring-boot-starter-parent2.0.4.RELEASE UTF-8 UTF-8 1.8 org.springframework.boot spring-boot-starter-weborg.springframework.boot spring-boot-starter-aopcom.google.guava guava24.0-jre org.springframework.boot spring-boot-maven-plugin
Application.java
package com;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@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
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
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
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;
@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
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!"}";
}
}
}
附：GitHub源码地址：https://github.com/gzz2017gzz/spring-boot2-example/tree/master/54-spring-boot-repeat-submit-single
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。
