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                # 組件源碼 /** * <b>方法描述:</b> 賦值并返回舊值 <br/> * <b>創建者:</b> admin <br/> * <b>創建時間:</b> 2018-05-09 10:57:07 <br/> * * @param key * 入參|key|{@link java.lang.String} * @param value * 入參|value|{@link java.lang.String} * @param oldvalue * 出參|舊值|{@link java.lang.String} * @return -1 異常<br/> * 1 成功<br/> */ @Component(label = "賦值并返回舊值", style = "判斷型", type = "同步組件", comment = "自動將key對應到value并且返回原來key對應的value。如果key存在但是對應的value不是字符串,就返回錯誤", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-09 10:57:07") @InParams(param = { @Param(name = "key", comment = "key", type = java.lang.String.class), @Param(name = "value", comment = "value", type = java.lang.String.class) }) @OutParams(param = { @Param(name = "oldvalue", comment = "舊值", type = java.lang.String.class) }) @Returns(returns = { @Return(id = "-1", desp = "異常"), @Return(id = "1", desp = "成功") }) public static ResultBase P_getset(String key, String value) { Object obj = null; try { obj = redisTemplate.opsForValue().getAndSet(key, value); return ResultBase.newSuccessResult(obj.toString()); } catch (Exception e) { AppLog.error(e); return ResultBase.newExceptionResult("TPTR5012", "賦值并返回舊值 異常:" + AppLog.errorMsg(e)); } } 交易中組件使用方式: ![](https://img.kancloud.cn/f0/52/f052bbab5ab1743fdfd72458ac9199e7_950x750.jpg) ## 參數說明及示例 key:redis中的key,示例: `"qwer"` value:新設置的值,示例: `"newvalue"` 舊值:返回舊值,示例: `__INNER__["oldvalue"]` > 自動將key對應到value并且返回原來key對應的value。如果key存在但是對應的value不是字符串,就返回錯誤
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