怎样实现统计某个文件被下载的次数？

Question

最好有源码。

Answer 1

BufferedOutputStream bos = null;
            boolean downFlag = true;
            File file = new File(storeFilePath);
            String filename = file.getName();
            StringBuffer sb = new StringBuffer(50);
            sb.append("attachment;  filename=");
            sb.append(filename);
            if (filename != null) {
              try {
                httpServletResponse.setContentType(
                        "application/x-msdownload;charset=GB2312");
                        httpServletResponse.setHeader("Content-Disposition",
                        new String(sb.toString()
                        .getBytes(), "ISO8859-1"));
                    //String  tmp  =  "c:/"  +  filename;
                FileInputStream fis = new FileInputStream(storeFilePath);
                bos = new BufferedOutputStream(httpServletResponse.getOutputStream());
                byte[] buffer = new byte[2048];
                while (fis.read(buffer) != -1) {
                  bos.write(buffer);
                }                bos.write(buffer, 0, buffer.length);                fis.close();
                bos.close();
              }
              catch (IOException e1) { //点了“取消”按钮
                downFlag = false;
              }
                  //下载成功，更新下载次数！
                  //rs.close();
              if (downFlag == true) {
                stmt = conn.prepareStatement(updateDownTimesSql);
                stmt.setInt(1, downLoadTimes + 1);
                stmt.execute();              }
            }

Answer 2

可以尝试这样：
    用filter对下载文件的目录进行过滤，然后考虑看能不能分析出文件名，最后就是数据库操作！