此篇主要介绍的是接受前台ajax的数据，判断输入的验证码是否正确：

       

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%//从session里面获取图片验证码String inputCode = request.getParameter("inputCode");String numrand = (String)request.getSession().getAttribute("numrand");if(numrand.equals(inputCode)){out.print("true");}else{out.print("false");}
%>