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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                # 組件源碼 /** * <b>方法描述:</b> 保留列表元素 <br/> * <b>創建者:</b> admin <br/> * <b>創建時間:</b> 2018-05-09 09:54:12 <br/> * * @param key * 入參|key|{@link java.lang.String} * @param start * 入參|開始位置|{@link long} * @param end * 入參|結束位置|{@link long} * @param list * 出參|列表|{@link java.util.List} * @return -1 異常<br/> * 1 成功<br/> */ @Component(label = "保留列表元素", style = "判斷型", type = "同步組件", comment = "list只保留范圍內的元素。基于0的下標,即list的第一個元素下標是0;負數,表示偏移量是從list尾部開始計數", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-09 09:54:12") @InParams(param = { @Param(name = "key", comment = "key", type = java.lang.String.class), @Param(name = "start", comment = "開始位置", type = long.class), @Param(name = "end", comment = "結束位置", type = long.class) }) @OutParams(param = { @Param(name = "list", comment = "列表", type = java.util.List.class) }) @Returns(returns = { @Return(id = "-1", desp = "異常"), @Return(id = "1", desp = "成功") }) public static ResultBase P_ltrim(String key, long start, long end) { try { redisTemplate.opsForList().trim(key, start, end); } catch (Exception e) { AppLog.error(e); return ResultBase.newExceptionResult("TPTR2005", "保留列表元素 異常:" + AppLog.errorMsg(e)); } return ResultBase.newSuccessResult(); } 交易中組件使用方式: ![](https://img.kancloud.cn/1a/e6/1ae64e46b4b32e201a36c1b31d84c004_1126x750.jpg) ## 參數說明及示例 key:redis中的key,示例: `"qwer"` 開始位置:List數據的開始位置,示例: `3` 結束位置:List數據的結束位置,示例: `5` 列表:返回保留的list結果,示例: `__INNER__["resultList"]` > list只保留范圍內的元素。基于0的下標,即list的第一個元素下標是0;負數,表示偏移量是從list尾部開始計數
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