Question

我尝试使用outputstream.write（）在带有下载选项的文本文件中编写clob数据。但它只写第一行。我怎样才能写出完整的数据。这是我的代码：

        OutputStream outputStream = response.getOutputStream();
        oRs=oStmt.executeQuery("select subtxt  from mybank.dt_subject  where mailid = '"+sMailID+"' and sessionid = '"+sSessionID+"'");
        while(oRs.next()){

             outputResult = oRs.getString(1);
             outputStream.write(outputResult.getBytes());                
             response.setContentType("text/plain");
             response.setHeader("Content-disposition","attachment; filename=\"" +sFileName+".txt\"");
             outputStream.flush();
             outputStream.close();

        }

Answer 1

您正在第一次迭代（LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE); convertViewHeader = inflater.inflate(R.layout.myflipperiew , null); ViewFlipper flipper=(ViewFlipper)convertViewHeader.findViewById(R.id.myflipper); mListView = (ListView) findViewById( R.id.mainListView ); mListView.addHeaderView(flipper);）关闭流。

显然，在此之后你不能写过第一行。

Answer 2

就像已经说过的那样 - 在while循环之后关闭你的outputStream：

 OutputStream outputStream = response.getOutputStream();
    oRs = oStmt.executeQuery("select subtxt  from mybank.dt_subject  where mailid = '" + sMailID + "' and sessionid = '" + sSessionID + "'");
    while (oRs.next()) {

        outputResult = oRs.getString(1);
        outputStream.write(outputResult.getBytes());
        response.setContentType("text/plain");
        response.setHeader("Content-disposition", "attachment; filename=\"" + sFileName + ".txt\"");

    }
    outputStream.flush();
    outputStream.close();

无法在java中的文本文件中写入完整数据

2 个答案: