<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String ctx = request.getContextPath(); //콘텍스트명 얻어오기. response.setHeader("Pragma-directive", "no-cache"); response.setHeader("Cache-directive", "no-cache"); response.setHeader("Pragma", "no-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires",0); %> CaptCha 예제3