Jsp/Servlet

开发平台：

Java

VerifyCode.jsp：源码内容

							<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.awt.*,java.awt.image.*"%>
<%@ page import="java.util.*,javax.imageio.*,java.io.*"%>
<%@ page import="dreamtime.dreamnews.VerifyCode"%>
 
<%! String sVerifyCode;   //验证码字符串  %> 
 
<% //设置页面不缓存
 response.setHeader("Pragma","No-cache");
 response.setHeader("Cache-Control","no-cache");
 response.setDateHeader("Expires", 0);
 response.reset();
 
 try{
  // 将认证码存入SESSION
  //调用 runVerifyCode(int i) ,把i改成所要的验证码位数
  VerifyCode VC = new VerifyCode();
  session.setAttribute("VerifyCode",VC.runVerifyCode(4));
  //session.setMaxInactiveInterval(60);
  
  // 输出图象到页面
  sVerifyCode = (String)session.getAttribute("VerifyCode");
  OutputStream outs = response.getOutputStream();
  ImageIO.write(VC.CreateImage(sVerifyCode),"JPEG",outs);
 }catch(Exception e){
  return;
    }
%>

						