# 组件源码 /** * <b>方法描述：</b> 设置值(不覆盖) <br/> * <b>创建者：</b> admin <br/> * <b>创建时间：</b> 2018-05-09 10:56:04 <br/> * * @param key * 入参|key|{@link java.lang.String} * @param value * 入参|value|{@link java.lang.String} * @return -1 异常<br/> * 1 成功<br/> */ @Component(label = "设置值(不覆盖)", style = "判断型", type = "同步组件", comment = "只有key不存在才会设置", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-09 10:56:04") @InParams(param = { @Param(name = "key", comment = "key", type = java.lang.String.class), @Param(name = "value", comment = "value", type = java.lang.String.class) }) @Returns(returns = { @Return(id = "-1", desp = "异常"), @Return(id = "1", desp = "成功") }) public static ResultBase P_setNx(String key, String value) { try { if (redisTemplate.opsForValue().setIfAbsent(key, value)) return ResultBase.newSuccessResult(); } catch (Exception e) { AppLog.error(e); return ResultBase.newExceptionResult("TPTR5008", "设置值(不覆盖) 异常：" + AppLog.errorMsg(e)); } return ResultBase.newFailureResult("TPTR5007", "设置值(不覆盖)失败"); } 交易中组件使用方式：  ## 参数说明及示例 key：redis中的key，示例： `"qwer"` value：设置的值，示例： `"newvalue"` > 只有key不存在才会设置，可以理解为创建一个新的redis值