在页面基础上添加表单验证代码，验证通过后跳转

<%@ page language="java" import="java.util.*,csdb.zhuce.*" pageEncoding="gbk"%>


<%
String path = request.getRealPath("");
zhuce randomImage = new zhuce();
    String content = randomImage.getContent();//返回的是图片里面的随机数的内容
    randomImage.creatImage(path+"/image/random.jpg",content);
   
    //设置页面不缓存
  response.setHeader("Pragma","No-cache");
  response.setHeader("Cache-Control","no-cache");
  response.setDateHeader("Expires", 0);
%>