response.setHeader("Pragma","no-cache"); response.setHeader("Cache-Control","no-cache"); response.setDateHeader("Expires",0);
<session-config> <session-timeout>5</session-timeout> </session-config>
// イメージの出力 ServletOutputStream sos = null; response.setContentType("image/jpeg"); sos = response.getOutputStream(); ImageOutputStream ios = ImageIO.createImageOutputStream(sos); ImageWriter iw = (ImageWriter)ImageIO. getImageWritersByFormatName("jpeg").next(); iw.setOutput(ios); iw.write(im);
(例) InetAddress.getByAddress(new byte[]{(byte)192,(byte)168,(byte)0,(byte)1}).getHostName()