[FW:] Writing big files to ServletOutputStream

来源： 作者：unkonwn 时间：2005-12-18 点击：

Problem when writing big files to ServletOutputStream

转自：http://www.theserverside.com/discussions/thread.tss?thread_id=29261

Posted By: Anand Rajagopal on October 06, 2004 @ 10:18 AM

I am using the following code to write files to servlet output stream. The problem is the browser is not downloading the entire file when the file size grows above 10 MB. Any help would be greatly helpful.

FileInputStream fis = new FileInputStream(new File(fileName));
response.setHeader("Content-Disposition:", "attachment;filename=" + fileName );

数据挖掘研究院

BufferedInputStream bis= new BufferedInputStream(fis);
ServletOutputStream sos = response.getOutputStream();
byte[] buffer = new byte[5000];
response.setHeader("Content-Length:", String.valueOf (bis.available()));
while (true) {
   int bytesRead = bis.read(buffer, 0, buffer.length);
   if (bytesRead < 0)
   break;
   sos.write(buffer, 0, bytesRead);
}
fis.close();
sos.flush();
sos.close(); 数据挖掘研究院

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Problem when writing big files to ServletOutputStream Posted By: Krishnan Muthusubramanian on October 06, 2004 @ 11:45 AM in response to Message #141542 0 replies in this thread response.setHeader("Content-Length:", String.valueOf (bis.available())); The "available" method of InputStream does not return the number of bytes that avilable :). Check the Java Doc for this method. 数据挖掘研究院 Try new File(fileName).length() instead