stringRedisTemplate.opsForValue().setIfAbsent

stringRedisTemplate.opsForValue().setIfAbsent方法是RedisTemplate中的一个操作，用于在键不存在的情况下设置键的值。具体使用方式如下：

boolean lock = stringRedisTemplate.opsForValue().setIfAbsent("testKey", "value");

该方法会将键"testKey"的值设为"value"，并返回一个布尔值表示操作是否成功。如果键"testKey"已经存在，则该方法不会进行任何操作并返回false；如果键"testKey"不存在，则该方法会将键的值设为"value"并返回true。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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