cookie中保存中文

-------------------------------- cookie中保存中文--------------------------------

Cookie中保存中文

　　Cookie中保存中文，次要。

Cookie中是不可以设置中文的，但可以使用URLEncodor.encode()方法编码后在存放到Cookie中。在获取Cookie时，需要先使用URLDecoder.decode()方法解码，再使用。

　　向客户端响应中添加Cookie

String name = URLEncoder.encode("姓名", "UTF-8");        String value = URLEncoder.encode("张三", "UTF-8");        Cookie c = new Cookie(name, value);        c.setMaxAge(3600);        response.addCookie(c);

 

从客户端请求中获取Cookie

response.setContentType("text/html;charset=utf-8");        Cookie[] cs = request.getCookies();        if(cs != null) {            for(Cookie c : cs) {               String name = URLDecoder.decode(c.getName(), "UTF-8");               String value = URLDecoder.decode(c.getValue(), "UTF-8");                String s = name + ": " + value + " ";               response.getWriter().print(s);            }        }

 

代码示例：

存储中文cookie

package com.rl.cookie;   import java.io.IOException; import java.io.PrintWriter; import java.net.URLEncoder;   import javax.servlet.ServletException; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;   public class RegistServlet extends HttpServlet {          @Override        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {               doPost(req, resp);        }               public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {               request.setCharacterEncoding("UTF-8");               String userpass = "李昆鹏,123";               //编码用URLEncoder.encode               userpass = URLEncoder.encode(userpass,"UTF-8");               //创建cookie对象，值使用中文存储               //cooike中存储中文会报错               Cookie cookie = new Cookie("userpass", userpass);               //设置cookie的存活时间,里面的参数是以秒为单位               cookie.setMaxAge(60*60);               cookie.setPath("/cookie_demo4/");               //把cookie写入浏览器               response.addCookie(cookie);               response.getWriter().print("success");        }   }

 

取出中文cookie

public class Regist1Servlet extends HttpServlet {          @Override        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {               doPost(req, resp);         }               public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {               //从浏览器中来读取当前项目的所有cookie               Cookie[] cookies = request.getCookies();               String userpassVal = null;               //遍历cookies               for (Cookie cookie : cookies) {                      //获取cookie的name                      String cookieName = cookie.getName();                      if("userpass".equals(cookieName)){                             //获得Base64编码后的字符串                             userpassVal = cookie.getValue();                             System.out.println(userpassVal);                             //解码用URLDecoder.decode                             userpassVal = URLDecoder.decode(userpassVal,"UTF-8");                             System.out.println(userpassVal);                      }               }             } }