一秒刷新頁面一次 response.setHeader("refresh","1");
二秒跳到其他頁面 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","壓縮後的數據");
高速瀏覽器壓縮數據的長度:response.setHeader("Content-Length",壓縮後的數據.length+"");
高速瀏覽器圖片或視頻:response.setHeader("Content-type","這個參數在tomcat裏conf下的web.xml裏面找");
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)
}
高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)
}