image.jsp

来自「采用j2ee架构做的bbs」· JSP 代码 · 共 22 行

<%@page contentType="text/html;charset=gb2312" %>
<%@page import="java.util.*" %>
<%
//设置页面不缓存
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);

// 取随机产生的认证码(4位数字)
String sRand="";
//生成随机类
Random random = new Random();
for (int i=0;i<4;i++){
    String rand=String.valueOf(random.nextInt(10));
    sRand+=rand;   
}

// 将认证码存入SESSION
session.setAttribute("rand",sRand);
out.print(sRand);
%>