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                # 組件源碼 /** * <b>方法描述:</b> 獲取列表元素(按下標) <br/> * <b>創建者:</b> admin <br/> * <b>創建時間:</b> 2018-05-09 09:54:31 <br/> * * @param key * 入參|key|{@link java.lang.String} * @param index * 入參|下標|{@link long} * @param value * 出參|值|{@link java.lang.String} * @return -1 異常<br/> * 1 成功<br/> */ @Component(label = "獲取列表元素(按下標)", style = "判斷型", type = "同步組件", comment = "index 可以頭部開始,也可以尾部開始;超過范圍的時候返回 nil", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-09 09:54:31") @InParams(param = { @Param(name = "key", comment = "key", type = java.lang.String.class), @Param(name = "index", comment = "下標", type = long.class) }) @OutParams(param = { @Param(name = "value", comment = "值", type = java.lang.String.class) }) @Returns(returns = { @Return(id = "-1", desp = "異常"), @Return(id = "1", desp = "成功") }) public static ResultBase P_lindex(String key, long index) { try { Object obj = redisTemplate.opsForList().index(key, index); return ResultBase.newSuccessResult(obj.toString()); } catch (Exception e) { AppLog.error(e); return ResultBase.newExceptionResult("TPTR2006", "獲取列表元素(按下標) 異常:" + AppLog.errorMsg(e)); } } 交易中組件使用方式: ![](https://img.kancloud.cn/d3/b8/d3b815bae2d62c358bb0048bce42857b_1090x750.jpg) ## 參數說明及示例 key:redis中的key,示例: `"qwer"` 下標:List數據的下標值,示例: `4` 值:返回根據下標獲取的list結果,示例: `__INNER__["resultList"]` > index 可以頭部開始,也可以尾部開始;超過范圍的時候返回 nil
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