自定义防止重复提交注解（利用redis）_redis防重复提交注解

自定义注解

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * 避免重复提交
 * @ClassName: AvoidRepeatableCommit
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface AvoidRepeatableCommit {

    /**
     * 指定时间内不可重复提交,单位毫秒
     */
    long timeout()  default 3000 ;

}
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AOP

import com.ljmes.vo.ResultUtil;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

/**
 * 重复提交aop
 **/
@Aspect
@Component
public class AvoidRepeatableCommitAspect {

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * @param point
     */
    @Around("@annotation(com.ljmes.util.AvoidRepeatableCommit)")
    public Object around(ProceedingJoinPoint point) throws Throwable {

        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
        // 获取访问的url
        StringBuffer requestURL = request.getRequestURL();
        System.out.println("requestURL==" + requestURL);
        //获取注解
        MethodSignature signature = (MethodSignature) point.getSignature();
        Method method = signature.getMethod();
        //参数
        StringBuilder params = new StringBuilder();
        for (Object arg : point.getArgs()) {
            params.append(arg);
        }
        System.out.println("params = " + params);
        //使用访问的url加上params作为key
        String key = requestURL+params.toString();
        System.out.println("key==" + key);
        //获取自定义注解
        AvoidRepeatableCommit avoidRepeatableCommit = method.getAnnotation(AvoidRepeatableCommit.class);
        long timeout = avoidRepeatableCommit.timeout();
        if (timeout < 0) {
            timeout = 3;
        }
        //获取redis中的值
        Object obj = redisTemplate.opsForValue().get(key);
        // 不为null说明在timeout时间内重复提交
        if (obj != null) {
            return ResultUtil.error("重复提交！");
        }
        redisTemplate.opsForValue().set(key, UUID.randomUUID().toString(), timeout, TimeUnit.MILLISECONDS);
        //执行方法
        Object object = point.proceed();
        System.out.println("object==" + object);
        return object;
    }

}
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用到的依赖

<?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>org.example</groupId>
    <artifactId>demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.2.4.RELEASE</version>
        </dependency>
        <!--swagger-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-boot-starter</artifactId>
            <version>3.0.0</version>
        </dependency>
        <!--aop-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <!--redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>2.2.4.RELEASE</version>
        </dependency>
        <!--Lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.4</version>
        </dependency>

    </dependencies>

</project>
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测试

import com.ljmes.util.AvoidRepeatableCommit;
import com.ljmes.vo.ResultUtil;
import com.ljmes.vo.ResultVO;
import com.ljmes.vo.UserDTO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;


@Api("demo")
@RestController
@RequestMapping("/demo")
public class DemoController {



    @ApiOperation("防止重复提交demo")
    @PostMapping("/demo")
    @AvoidRepeatableCommit
    public ResultVO demo(@RequestBody UserDTO demo, @RequestParam Integer userId) {
        return ResultUtil.success(demo);
    }


}
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