页面访问量计数器
<body>
<h1>实现网页计数器</h1>
<%
out.print("设置计数值");
Integer c;
if(application.getAttribute("count")==null){
c=1;
}else{
c=(Integer.parseInt(application.getAttribute("count").toString()));
}
application.setAttribute("name","zyq");
application.setAttribute("count",c);
out.print("set name = zyq");
out.print("</br>set count ="+c+"</br>");
%>
<ahref="<%=basePath%>jsp/jsp/gateppatter.jsp">计数器页面</a>
</body>
gateppatter.jsp
<body>
计数器页面
<br>
<%
int c=(Integer.valueOf(application.getAttribute("count").toString()).intValue());
out.print(c);
application.setAttribute("count",Integer.toString(c+1));
%>
</body>
自动登录（用户名和密码：）<使用cookie技术>
<body>
<%
String welcome="首次访问" ;
String[] info = new String[]{ "",""};
Cookie[] cookie =request.getCookies();
if(cookie!=null){
for(inti=0;i<cookie.length;i++){
if(cookie[i].getName().equals("zyqcookie")){
info =cookie[i].getValue().split("#");
}
}
}
%>
<formaction ="<%=basePath%>jsp/jsp/valid.jsp"method="post">
<table>
<tr><th>用户名</th>
<td><inputtype="text"name="name"id="name"value="<%=info[0]%>"/></td>
</tr>
<tr><th>密码</th>
<td><inputtype="text"name="password"id="password"value="<%=info[1]%>"/></td>
</tr>
<tr>
<inputtype="submit"value="提交"/>
</tr>
</table>
</form>
</body>
valid.jsp
<body>
<%
String name=request.getParameter("name");
Stringpassword=request.getParameter("password");
if(name.equals("zyq")&& password.equals("123")){
Cookiezyqcookie = newCookie("zyqcookie",name+"#"+password);
zyqcookie.setMaxAge(60*60*24*30);//一个月时间
response.addCookie(zyqcookie);
%>
<script>
alert("用户登录成功");
</script>
<%
}
else{
%>
<script>
alert("用户登录失败");
<%
}
%>
</script>
</body>
定时刷新页面
<body>
<h1>自动刷新页面</h1>
<%
response.setHeader("Refresh","60");
out.print(new Date());
%>
</body>