spring防止重复点击，两种注解实现（AOP）

第一种：@EasyLock

简介

为了简化可复用注解，自己实现的注解，代码简单随拿随用

使用方式

1.创建一个注解

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface EasyLock {
    long waitTime() default 1;
    long leaseTime() default 3;
}

2. 创建一个AOP切面类（异常可以自定义，这里我用的Cicada）

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.stereotype.Component;
import vip.lspace.agent.common.annotation.EasyLock;
import vip.lspace.agent.common.exception.LockException;

import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;

@Component
@Aspect
@Slf4j
public class LockAop {
    @Resource
    private LockException lockException;

    @Resource
    RedissonClient redissonClient;

    private static final String redisLockKeyParamName = "redisLockKey";

    @Pointcut("@annotation(vip.lspace.agent.common.annotation.EasyLock)")
    public void lockPointcut() {
    }

    @Around("lockPointcut()")
    public Object doAround(ProceedingJoinPoint proceedingJoinPoint) {
        log.info("EasyLock locking");
        MethodSignature methodSignature = (MethodSignature) proceedingJoinPoint.getSignature();
        EasyLock easyLock = methodSignature.getMethod().getAnnotation(EasyLock.class);

        Object[] args = proceedingJoinPoint.getArgs();
        String[] parameterNames = methodSignature.getParameterNames();
        String redisLockKey = "";
        for (int i = 0; i < parameterNames.length; i++) {
            if (parameterNames[i].equals(redisLockKeyParamName)) {
                redisLockKey = (String) args[i];
            }
        }
        if (StringUtils.isBlank(redisLockKey)) {
            throw lockException.lockKeyNotExist();
        }

        RLock lock = redissonClient.getLock(redisLockKey);
        try {
            if (!lock.tryLock(easyLock.waitTime(), easyLock.leaseTime(), TimeUnit.SECONDS)) {
                throw lockException.getLockTimeOut(redisLockKey);
            }
            return proceedingJoinPoint.proceed();
        } catch (Throwable e) {
            throw new RuntimeException(e);
        } finally {
            if (lock.isLocked() && lock.isHeldByCurrentThread()) {
                lock.unlock();
                log.info("当前线程{}，释放锁:{}", Thread.currentThread().getId(), redisLockKey);
            }
        }
    }

@CicadaBean(namespace = "lock")
public interface LockException {
    @ExceptionInfo(errCode = 13001, errMessage = "没找到分布式锁key")
    CicadaException lockKeyNotExist();

    @ExceptionInfo(errCode = 13002, errMessage = "超时未获取到锁: %s")
    CicadaException getLockTimeOut(String key);
}

3.使用方式

注意点：

必须包含名为redisLockKey的参数，作为redis的key

@Override
    @EasyLock(waitTime = 1,
            leaseTime = 3
    )
    @Transactional(rollbackFor = Exception.class)
    public void concurrentTest(String redisLockKey) {
        PaymentBillBacktrack paymentBillBacktrack = paymentBillBacktrackService.getById(1L);
        String refundRequestNo = paymentBillBacktrack.getMerchantRefundRequestNo();
        paymentBillBacktrack.setMerchantRefundRequestNo(String.valueOf(Integer.parseInt(refundRequestNo) + 1));
        paymentBillBacktrackService.updateById(paymentBillBacktrack);
    }

第二种：@NiceLock

简介

大佬提供的公共组件，引包后可直接使用，使用简单，细节代码可看nicelock: nicelock：一个注解，即可使用Java的分布式锁。（基于Redisson）

使用方式

1.引包

一定得引入1.1.6的，甚至最新版本，不然有问题！！！

<dependency>
     <groupId>com.suchtool</groupId>
     <artifactId>nicelock-spring-boot-starter</artifactId>
     <version>1.1.6</version>
</dependency>

2.使用

    @Override
    @Transactional
    @NiceLock(
            keys = {"#userId"},
            acquireTimeout = 3000L,
            exception = NiceLockLockFailException.class,
            message = "服务已完成评价，不能重复提交"
    )
    public void test(String userId) {
        System.out.println("修改订单: 用户ID=" + userId);
    }