1、定义注解类

@Target({ ElementType.METHOD })@Retention(RetentionPolicy.RUNTIME)@Documentedpublic @interface DistributedLock {  //锁名称  String lockName() default "";  //释放时间  long releaseTime() default 5*1000;  //时间单位  TimeUnit timeUnit() default TimeUnit.MILLISECONDS;}

2、定义切面拦截 DistributedLock 注解

@Aspect@Component@Slf4jpublic class DistributedLockAspect {  @Autowired  private RedissonClient redissonClient;　　 //这里需要修改对应的包名  @Pointcut("@annotation(com.utils.annotation.DistributedLock)")  public void RlockAspect() {  }  @Around("RlockAspect()")  public Object arround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {    Object object = null;    RLock lock = null;    log.info("rlockAspect start ");    try {      DistributedLock rlockInfo = getRlockInfo(proceedingJoinPoint);      String lockKey = getLocalKey(proceedingJoinPoint, rlockInfo);      lock = redissonClient.getLock(lockKey);      if (lock != null) {        final boolean status = lock.tryLock(rlockInfo.releaseTime(), rlockInfo.timeUnit());        if (status) {          object = proceedingJoinPoint.proceed();        }      } else {        log.info("未获取到锁：{}", lockKey);      }    } finally {      // 当前线程获取到锁再释放锁      if (lock != null && lock.isHeldByCurrentThread()) {        lock.unlock();      }    }    return object;  }  public DistributedLock getRlockInfo(ProceedingJoinPoint proceedingJoinPoint) {    MethodSignature methodSignature = (MethodSignature) proceedingJoinPoint.getSignature();    return methodSignature.getMethod().getAnnotation(DistributedLock.class);  }  /**   * 获取redis lock key   *   * @param proceedingJoinPoint   * @return   */  public String getLocalKey(ProceedingJoinPoint proceedingJoinPoint, DistributedLock rlockInfo) {    StringBuilder localKey = new StringBuilder("Rlock");    final Object[] args = proceedingJoinPoint.getArgs();    String businessNo = "";    // 如果没有设置锁值    if (StringUtils.isNotEmpty(rlockInfo.lockName())) {      businessNo = rlockInfo.lockName();    } else {      MethodSignature methodSignature = (MethodSignature) proceedingJoinPoint.getSignature();      Class[] parameters = methodSignature.getParameterTypes();      String methodName = methodSignature.getMethod().getName();      if (parameters != null) {        for (int i = 0; i < parameters.length; i++) {          Class parameter = parameters[i];          if (parameter.getSimpleName().equals("NDevice")) {            NDevice de = (NDevice) args[i];            businessNo = de.getUuid() + methodName;          }          if (parameter.getSimpleName().equals("FrameBean")) {            FrameBean de = (FrameBean) args[i];            businessNo = de.getColumn1() + methodName;          }        }        // 如果没有获取到业务编号，则使用方法签名        if (StringUtils.isEmpty(businessNo)) {          businessNo = methodName;        }      }    }    return businessNo;  }}

3、使用方法：在需要用分布式锁的方法上面加 @DistributedLock 注解即可