1.utils类

/*
 * 该类可以从浏览器请求中提取出cookies并进行对cookis的相关操作
 * 
 */
 
public class CookiesUtil extends BaseController {
    
    /**
     * 根据名字获取cookie
     * 
     * @param request
     * @param name
     *            cookie名字
     * @return
     */
    public static Cookie getCookieByName(HttpServletRequest request, String name) {
        Map<String, Cookie> cookieMap = ReadCookieMap(request);
        if (cookieMap.containsKey(name)) {
            Cookie cookie = (Cookie) cookieMap.get(name);
            return cookie;
        } else {
            return null;
        }
    }
 
    /**
     * 将cookie封装到Map里面
     * 
     * @param request
     * @return
     */
    private static Map<String, Cookie> ReadCookieMap(HttpServletRequest request) {
        Map<String, Cookie> cookieMap = new HashMap<String, Cookie>();
        Cookie[] cookies = request.getCookies();
        if (null != cookies) {
            for (Cookie cookie : cookies) {
                cookieMap.put(cookie.getName(), cookie);
            }
        }
        return cookieMap;
    }
 
    /**
     * 保存Cookies
     * 
     * @param response
     *            servlet请求
     * @param value
     *            保存值
     * @author jxf
     */
    public static HttpServletResponse setCookie(HttpServletResponse response, String name, String value,int time) {
        // new一个Cookie对象,键值对为参数
        Cookie cookie = new Cookie(name, value);
        // tomcat下多应用共享
        cookie.setPath("/");
        // 如果cookie的值中含有中文时，需要对cookie进行编码，不然会产生乱码
        try {
            URLEncoder.encode(value, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        cookie.setMaxAge(time);
        // 将Cookie添加到Response中,使之生效
        response.addCookie(cookie); // addCookie后，如果已经存在相同名字的cookie，则最新的覆盖旧的cookie
        return response;
    }
    /**
     *删掉 cookie
     * @param request
     * @return
     */
    public static HttpServletResponse delCookie(HttpServletRequest request, HttpServletResponse response){
        try {
            Cookie[] cookies = request.getCookies();
            for (Cookie cookie : cookies) {
              // 这块时间不可以设置成负数，设置成负数，浏览器默认会存成session,关掉浏览器才会失效
                setCookie(response, cookie.getName(), cookie.getValue(),0);
                System.out.println(cookie.getName());
            }
        } catch (Exception e) {
            System.out.println( "从cookie获取到相应的值失败----"+e.getMessage());
        }
        return response;
    }
}

2.具体使用

 /**
     *从cookies 中获取对应的值
     * @param request
     * @return
     */
    public static Map<String,String> getToken(HttpServletRequest request){
        Map<String,String> map=new HashMap<>(  );
        String token = "";
        String accessToken = "";
        String expiresIn = "";
        try {
            Cookie[] cookies = request.getCookies();
            for (Cookie cookie : cookies) {
                switch(cookie.getName()){
                    case "accessToken":
                        accessToken = cookie.getValue();
                        break;
                    case "expiresIn":
                        expiresIn = cookie.getValue();
                        break;
                    case "token":
                        token = cookie.getValue();
                        break;
                    default:
                        break;
                }
            }
            map.put( "token",token );
            map.put( "accessToken",accessToken );
            map.put( "expiresIn",expiresIn );
        } catch (Exception e) {
            System.out.println( "从cookie获取到相应的值失败----"+e.getMessage());
        }
        return map;
    }

转自：记录 Java 从浏览器中获取cookies