File Download (two streams at both ends) and file download (two streams)

File Download (two streams at both ends) and file download (two streams)
1.1 download the server-side Write Program (two streams at both ends)

The header that must be set during download: content-Type Content-Disposition

Response. setContentType (getServletContext (). getMimeType (filename ));

Response. setHeader ("Content-Disposition", "attachment; filename =" + filename );

 

 

1.2. traverse all files in the directory for download

 

The linked list is used for query)

Jsp page code implementation:

 

 

Server Download and browser Encoding Problems:

 

 

1.3. Precautions for file download:

Two streams: the input stream that reads the files to be downloaded. Output stream, send data to the client

2 Head: Set the Data Type of the downloaded file. Tell the browser to process the response data in download Mode

Different browsers need to encode the downloaded file name.