# 組件源碼 ``` /** * <b>方法描述：</b> 容器變量刪除(保留keys) <br/> * <b>創建者：</b> admin <br/> * <b>創建時間：</b> 2018-05-11 11:53:17 <br/> * * @param dict * 入參|容器|{@link java.util.Map} * @param keys * 入參|保留列表|{@link com.ylink.ide.trade.runtime.context.JavaList} * @return 0 失敗<br/> * 1 成功<br/> */ @Component(label = "容器變量刪除(保留keys)", style = "判斷型", type = "同步組件", comment = "刪除容器中的變量，只保留輸入的指定key", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-11 11:53:17") @InParams(param = {@Param(name = "dict", comment = "容器", type = java.util.Map.class), @Param(name = "keys", comment = "保留列表", type = java.util.List.class)}) @Returns(returns = {@Return(id = "0", desp = "失敗"), @Return(id = "1", desp = "成功")}) public static ResultBase P_delAndRetainKeys(Map dict, List keys) { if (dict == null) return ResultBase.newFailureResult("TPTC2003", "容器不能為空(Null)"); if (keys == null) return ResultBase.newFailureResult("TPTC2003", "保留元素集合不能為空(Null)"); Iterator it = dict.entrySet().iterator(); while (it.hasNext()) { Map.Entry en = (Entry)it.next(); if (!keys.contains(en.getKey())) { it.remove(); } } return ResultBase.newSuccessResult(); } ``` # 交易中組件使用方式  # 參數說明及示例 ## 入口參數 容器：一個 Map 對象，示例： `__INNER__` 保留列表：刪除容器中的變量，只保留輸入的指定 key，示例： `["x"]`