Redis实现Id生成器

/**
     * 获取单个Id
     *
     * @return
     */
    @GetMapping("/idGenerator")
    public long getId() {
        Long id = redisTemplate.opsForValue().increment("id");
        return id;
    }
    /**
     * 批量获取Id
     * 
     * @param size
     * @return
     */
    @GetMapping("/idGenerator/{size}")
    public List<Long> getIdBatch(@PathVariable(value = "size") int size) {
        // 先获取到最大值，只请求一次redis
        Long increment = redisTemplate.opsForValue().increment("id", size);
        // 找到最小值
        long startId = increment - size + 1;
        List<Long> ids = new ArrayList<>(size);
        for (long i = startId; i <= increment; i++) {
            ids.add(i);
        }
        return ids;
    }