# 組件源碼 ``` /** * <b>方法描述：</b> 替換元素 <br/> * <b>創建者：</b> admin <br/> * <b>創建時間：</b> 2018-05-11 11:52:47 <br/> * * @param list * 入參|集合|{@link java.util.List} * @param oldVal * 入參|舊值|{@link Object} * @param newVal * 入參|新值|{@link Object} * @return 0 失敗<br/> * 1 成功<br/> */ @Component(label = "替換元素", style = "判斷型", type = "同步組件", comment = "支持List 集合元素替換", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-11 11:52:47") @InParams(param = { @Param(name = "list", comment = "集合", type = java.util.List.class), @Param(name = "oldVal", comment = "舊值", type = Object.class), @Param(name = "newVal", comment = "新值", type = Object.class) }) @Returns(returns = { @Return(id = "0", desp = "失敗"), @Return(id = "1", desp = "成功") }) public static ResultBase P_replace(List list, Object oldVal, Object newVal) { if (list == null) return ResultBase.newFailureResult("TPTC1012", "集合為空(Null)"); Collections.replaceAll(list, oldVal, newVal); return ResultBase.newSuccessResult(); } ``` # 交易中組件使用方式  # 參數說明及示例 ## 入口參數 集合：傳入一個非空集合，示例： `__REQ__["list"]` 舊值：傳入一個集合中存在的元素，示例： `__REQ__["old"]` 新值：傳入一個想要替換舊值的值，示例： `__REQ__["new"]` > 注意：IDE 中集合和數組都以 [] 表示。