-------------------------------- 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 + "<br/>"; 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); } } } } |
