Response. setheader usage

Refresh the page once every second. response. setheader ("refresh", "1 ");

2 seconds to jump to other pages response. setheader ("refresh", "2; url = otherpagename ");

No cache:
Response. setheader ("Pragma", "No-Cache ");
Response. setheader ("cache-control", "No-Cache ");

Set the expiration time
Response. setdateheader ("expires", system. currenttimemillis () + time period set by yourself );

Access other pages: Response. setstatus (302); response. setheader ("location", "url ");

The compression format used by the notification Browser: Response. setheader ("content-encoding", "compressed data ");
Length of compressed data in High-Speed browsers: Response. setheader ("Content-Length", compressed data. Length + "");

High-speed browser images or videos: Response. setheader ("Content-Type", "this parameter is found in Web. xml under conf in Tomcat ");

Inputstream in = This. getservletcontext. getresourceasstream ("/2.jpg ");
Int Len = 0;
Byte buffer [] = new byte [1, 1024]

Outputstream out = response. getoutputstream ();

While (LEN = in. Read (buffer)> 0 ){
Out. Write (buffer, 0, Len)
}

The high-speed browser has downloaded the form: Response. setheader ("content-disposition", "attachment?filename=2.jpg ");

Inputstream in = This. getservletcontext. getresourceasstream ("/2.jpg ");
Int Len = 0;
Byte buffer [] = new byte [1, 1024]

Outputstream out = response. getoutputstream ();

While (LEN = in. Read (buffer)> 0 ){
Out. Write (buffer, 0, Len)
}

Response. setheader usage