JAVA高级面试进阶训练营视频教程

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一.cookie的名称或子cookie的名称不能为中文,否则无法获得cookie

这个好办,名称不用中文即可

二.cookie的值为中文时候,取cookie的值会出现乱码

解决办法:存取cookie时候先解码和编码

存cookie,进行编码:

cookie.Value = HttpUtility.UrlEncode("上海");

取cookie时候,进行解码: cookieValue = HttpUtility.UrlDecode(cookie.Value);

另外注意:

取子cookie时候,应该先解码,再根据%号分解,才能取到子cookie的值.

写Cookie里，一定要加上UrlEncode,用Request读Cookie时，一定要加上UrlDecode

示例如下： protected void Page_Load(object sender, EventArgs e)      {          HttpCookie GoodList = null;

         //如果GoodList不为空，则GOODID+1,GoodsName加"乐无烟"          if (Request.Cookies["GoodList"] != null)          {              GoodList = Request.Cookies["GoodList"];              GoodList.Values["GoodsID"] = Server.UrlEncode(Server.UrlDecode(Request.Cookies["GoodList"]["GoodsID"]) + ",1");              GoodList.Values["GoodsName"] = Server.UrlEncode(Server.UrlDecode(Request.Cookies["GoodList"]["GoodsName"]) + ",乐无烟");              GoodList.Expires = DateTime.Now.AddDays(1);              Response.Cookies.Add(GoodList);          }          else          {              //初次写入Cookie              GoodList = new HttpCookie("GoodList");              GoodList.Values["GoodsID"] = Server.UrlEncode("2");              GoodList.Values["GoodsName"] = Server.UrlEncode("无烟锅");              GoodList.Expires = DateTime.Now.AddDays(1);              Response.Cookies.Add(GoodList);          }

         Response.Write(Server.UrlDecode(Request.Cookies["GoodList"]["GoodsID"]) + "<br/>");          Response.Write(Server.UrlDecode(Request.Cookies["GoodList"]["GoodsName"]) + "<hr/>"); }

中文cookie的问题， 在Windows 2000正常， 在Windows 2003 sp1下会偶尔出现乱码(遇到双字节特殊字符时候，例子：「`蹆绌 )， 在windows 2003 SP2下基本乱码

解决办法： 采用 Server.UrlEncode(); Server.UrlDecode(); Cookie["MyCookie"] = Server.UrlEncode("中文") Response.Write(Server.UrlDecode(Request.Cookies("MyCookie").Value())) 编码和解码。

另外编码和解码要一致 System.Web.HttpUtility.UrlDecode 和 System.Web.HttpUtility.UrlEncode System.Web.HttpContext.Current.Server.UrlDecode 和 System.Web.HttpContext.Current.Server.UrlEncode