# 組件源碼 ``` /** * <b>方法描述：</b> 讀文件行 <br/> * <b>創建者：</b> admin <br/> * <b>創建時間：</b> 2018-05-08 17:17:18 <br/> * * @param filename * 入參|文件名|{@link java.lang.String} * @param charset * 入參|字符集GBK或UTF-8|{@link java.lang.String} * @param lineno * 入參|行號|{@link int} * @param lineinfo * 出參|讀取內容|{@link java.lang.String} * @return -1 異常<br/> * 0 失敗<br/> * 1 成功<br/> */ @Component(label = "讀文件行", style = "判斷型", type = "同步組件", version = "1.0.0", deprecated = false, author = "admin", date = "2018-05-08 05:17:18") @InParams(param = { @Param(name = "filename", comment = "文件名", type = java.lang.String.class), @Param(name = "charset", comment = "字符集GBK或UTF-8", type = java.lang.String.class), @Param(name = "lineno", comment = "行號", type = int.class) }) @OutParams(param = { @Param(name = "lineinfo", comment = "讀取內容", type = java.lang.String.class) }) @Returns(returns = { @Return(id = "-1", desp = "異常"), @Return(id = "0", desp = "失敗"), @Return(id = "1", desp = "成功") }) public static ResultBase P_fileReadLine(String filename, String charset, int lineno) { if (filename == null || filename == "") { return ResultBase.newFailureResult("TPTF0022", "文件名不能為空"); } FileInputStream fs = null; String strRet = ""; try { fs = new FileInputStream(filename); InputStreamReader inReader = new InputStreamReader(fs, charset); BufferedReader bufReader = new BufferedReader(inReader); for (int i = 0; i < lineno; i++) { strRet = bufReader.readLine(); if (strRet == null) { fs.close(); return ResultBase.newFailureResult("TPTF0023", "取行數:"+lineno+" 超過文件行數:"+i); } } fs.close(); } catch (Exception ex) { AppLog.error(ex); if (fs != null) { try { fs.close(); } catch (Exception e) { AppLog.error(e); } } return ResultBase.newExceptionResult("TPTF0024", "讀取文件行異常"+AppLog.errorMsg(ex)); } return ResultBase.newSuccessResult(strRet); } ``` # 交易中組件使用方式  # 參數說明及示例 ## 入口參數 文件名：輸入需要讀取的文件絕對路徑，示例： `"D:\\work\\CQYY\\workspace\\xxx.txt"` 字符集GBK或UTF-8：設置文件字符集，示例： `"utf-8"` 行號：需要讀取文件中的第幾行，示例： `3` ## 出口參數 讀取內容：讀取文件的內容，示例： `__INNER__["result"]`