response.setHeader各種使用方法

一秒刷新頁面一次 response.setHeader("refresh","1");

 二秒跳到其它頁面 response.setHeader("refresh","2;URL=otherPagename");

沒有緩存：
response.setHeader("Pragma", "No-cache");
  response.setHeader("Cache-Control", "no-cache");

設置過期的時間期限  
  response.setDateHeader("Expires", System.currentTimeMillis()+自己設置的時間期限);

訪問別的頁面：response.setStatus（302）; response.setHeader("location","url");

通知瀏覽器數據採用的壓縮格式：response.setHeader("Content-Encoding","壓縮后的數據");
快速瀏覽器壓縮數據的長度：response.setHeader("Content-Length",壓縮后的數據.length+"");

快速瀏覽器圖片或視頻：response.setHeader("Content-type","這個參數在tomcat里conf下的web.xml里面找");

inputstream in= this.getServletContext.getResourceAsStream("/2.jpg");
int len=0;
byte buffer[]= new byte[1024]

outputStream out = response.getOutputStream();

while(len=in.read(buffer)>0){
  out.write(buffer,0,len)
}

快速瀏覽器已下載的形式：response.setHeader("Content-disposition","attachment;filename=2.jpg");

inputstream in= this.getServletContext.getResourceAsStream("/2.jpg");
int len=0;
byte buffer[]= new byte[1024]

outputStream out = response.getOutputStream();

while(len=in.read(buffer)>0){
  out.write(buffer,0,len)
}