Http Session

1.       阅读了BEA DEV2DEV里面的一篇文件《Session详解》，结合在EPAYMENT项目中的经验，总结如下：

1).设置SESSION：(getimg.java)

//获取 1000-9999的随机数

String s="";

int intCount=0;

intCount=(new Random()).nextInt(9999);//

if(intCount<1000)intCount+=1000;

s=intCount+"";

//对session赋值

HttpSession mysession=request.getSession(true);

if(mysession!=null)

{

mysession.setAttribute("getImgAgain",s);

}else

{

System.out.println("getImgAgain > The session got is null!");

}

2.)获取SESSION(deduced.jsp)

String sessionValue =(String)session.getAttribute("getImg");  

String validateCode=request.getParameter("validateCode"); 

if(sessionValue!=null)

{

if(sessionValue.equals(validateCode))

        {

        System.out.println("deducted.jsp > ValidateCode is ok!");

        }

        else

        {

        response.sendRedirect("error.jsp?msgid=6");

        return;

        }

}else

{

        response.sendRedirect("error.jsp?msgid=6");

        return;

}