gt;jedis</artifactId>
</exclusion>
<exclusion>
<groupId>io.lettuce</groupId>
<artifactId>lettuce-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
配置Redis
application.properties
spring.redis.host=127.0.0.1
spring.redis.database=1
spring.redis.port=6379
定义一个注解
package com.example.springboot_06.intercept;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface RepeatSubmit {
/**
* 默认失效时间5秒
*
* @return
*/
long seconds() default 5;
}
创建一个拦截器
package com.example.springboot_06.intercept;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
/**
* 重复请求的拦截器
*
* @Component：该注解将其注入到IOC容器中
*/
@Slf4j
@Component
public class RepeatSubmitInterceptor implements HandlerInterceptor {
/**
* Redis的API
*/
@Autowired
private StringRedisTemplate stringRedisTemplate;
/**
* preHandler方法，在controller方法之前执行
* <p>
* 判断条件仅仅是用了uri，实际开发中根据实际情况组合一个唯一识别的条件。
*/
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
if (handler instanceof HandlerMethod) {
// 只拦截标注了@RepeatSubmit该注解
HandlerMethod method = (HandlerMethod) handler;
// 标注在方法上的@RepeatSubmit
RepeatSubmit repeatSubmitByMethod = AnnotationUtils.findAnnotation(method.getMethod(), RepeatSubmit.class);
// 标注在controler类上的@RepeatSubmit
RepeatSubmit repeatSubmitByCls = AnnotationUtils.findAnnotation(method.getMethod().getDeclaringClass(), RepeatSubmit.class);
// 没有限制重复提交，直接跳过
if (Objects.isNull(repeatSubmitByMethod) && Objects.isNull(repeatSubmitByCls)) {
log.info("isNull");
return true;
}
// todo: 组合判断条件，这里仅仅是