Cookie不能存儲(chǔ)中文，但是如果有這方面的需求，這個(gè)時(shí)候該如何解決呢?

這個(gè)時(shí)候，我們可以使用之前學(xué)過(guò)的一個(gè)知識(shí)點(diǎn)叫URL編碼，所以如果需要存儲(chǔ)中文，就需要進(jìn)行轉(zhuǎn)碼，具體的實(shí)現(xiàn)思路為:

1.在AServlet中對(duì)中文進(jìn)行URL編碼，采用URLEncoder.encode()，將編碼后的值存入Cookie中

2.在BServlet中獲取Cookie中的值,獲取的值為URL編碼后的值

3.將獲取的值在進(jìn)行URL解碼,采用URLDecoder.decode()，就可以獲取到對(duì)應(yīng)的中文值

(1)在AServlet中對(duì)中文進(jìn)行URL編碼

@WebServlet("/aServlet")public?class?AServlet?extends?HttpServlet?{????@Override????protected?void?doGet(HttpServletRequest?request,?HttpServletResponse?sponse)?throws?ServletException,?IOException?{????????//發(fā)送Cookie????????String?value?=?"張三";????????//對(duì)中文進(jìn)行URL編碼????????value?=?URLEncoder.encode(value,?"UTF-8");????????System.out.println("存儲(chǔ)數(shù)據(jù)："?+?value);????????//將編碼后的值存入Cookie中????????Cookie?cookie?=?new?Cookie("username",?value);????????//設(shè)置存活時(shí)間?，1周?7天????????cookie.setMaxAge(60?*?60?*?24?*?7);????????//2.?發(fā)送Cookie，response????????response.addCookie(cookie);????}????@Override????protected?void?doPost(HttpServletRequest?request,?HttpServletResponse?ponse)?throws?ServletException,?IOException?{????????this.doGet(request,?response);????}}

(2)在BServlet中獲取值，并對(duì)值進(jìn)行解碼。

@WebServlet("/bServlet")public?class?BServlet?extends?HttpServlet?{????@Override????protected?void?doGet(HttpServletRequest?request,?HttpServletResponsesponse)?throws?ServletException,?IOException?{??????//獲取Cookie??????//1.?獲取Cookie數(shù)組??????Cookie[]?cookies?=?request.getCookies();??????//2.?遍歷數(shù)組??????for?(Cookie?cookie?:?cookies)?{??????????//3.?獲取數(shù)據(jù)??????????String?name?=?cookie.getName();??????????if("username".equals(name)){??????????????String?value?=?cookie.getValue();//獲取的是URL編碼后的值%BC%A0%E4%B8%89??????????????//URL解碼??????????????value?=?URLDecoder.decode(value,"UTF-8");??????????????System.out.println(name+":"+value);//value解碼后為?張三??????????????break;??????????}??????}??}??@Override??protected?void?doPost(HttpServletRequest?request,?HttpServletResponseresponse)?throws?ServletException,?IOException?{???????this.doGet(request,?response);??}}

至此，我們就可以將中文存入Cookie中進(jìn)行使用。