首次进入页面刷新1次|JSP获取上一个访问页面URL的方法

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>无标题页</title>
    <script type="text/javascript">
        var Cookie = {
	        setCookie:function(name,value,option){
		        var str = name + "=" + escape(value);
		        if(option){
			        if(option.expireDays){
				        var date = new Date();
				        var ms = option.expireDays * 24 * 3600 * 1000;
				        date.setTime(date.getTime() + ms);
				        str += "; expires=" + date.toGMTString();
			        }
			        if(option.path)str += ";path=" + option.path;
			        if(option.domain)str += ";domain=" + option.domain;
			        if(option.secure)str += ";true";
		        }
		        document.cookie = str;
	        },
	        getCookie:function(name){
		        var cookies = document.cookie.split(";");
		        for(var i=0; i<cookies.length;i++){
			        var arr=cookies[i].split("=");
			        if(arr[0]==name){
				        return unescape(arr[1]);
			        }
		        }
		        return "";
	        },
	        delCookie:function(name){
		        this.setCookie(name,"",{expireDays:-1});
	        }
        }
        window.onload=function(){
            if("1"==Cookie.getCookie("diffmaker")){
                alert("找到Cookie,我将不再刷新页面,并删除Cookie");
                Cookie.delCookie("diffmaker");
            }else{
                alert("没有找到Cookie,我将刷新页面!");
                Cookie.setCookie("diffmaker","1",null);
                window.location.reload(true);
            }
        }
    </script>
</head>
<body>
</body>
</html>


JSP获取上一个访问页面URL的方法:通过request.getHeader("Referer")就可以获得上一访问页面的url地址。

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