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page
application
request
response
session
config
out
pageContext
 
page
<%@page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" %>
response
<%
  response.setHeader("Pragma","No-cache"); 
  response.setHeader("Cache-Control","no-cache"); 
  response.setDateHeader("Expires", 0); 
%>
<%response.sendRedirect("login.jsp");%>
session
<%session.invalidate();%>
request/session
<%
 String errmsg = request.getParameter("errmsg");
 request.getSession(true);
 String chk = "false";
 session.putValue("Enter",chk);
%>
out
<%
 if(errmsg != null && errmsg.equals("error1"))
  out.print("ÄãµÄÓû§ºÅ»¹Ã»ÓпªÍ¨!!");
 else if(errmsg != null && errmsg.equals("error2"))
  out.print("ÄúÊäÈë¹ÜÀíÔ±ÕʺŻòÕßÃÜÂë²»ÕýÈ·!!");
%>
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     int a =1;
     out.println("<input type='checkbox' value='"+a+"'>");
   
     %>
     
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