cookie跨域工具类

红太狼 2023-07-24 11:49 35阅读 0赞

import javax.servlet.http.Cookie;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.UnsupportedEncodingException;
    import java.net.URLDecoder;
    import java.net.URLEncoder;
    /** * @param * @return */
    public class CookieUtil { 
        /*** * 获得cookie中的值，默认为主ip：www.mall.com * @param request * @param cookieName * @param isDecoder * @return */
        public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) { 
            Cookie[] cookies = request.getCookies();
            if (cookies == null || cookieName == null){ 
                return null;
            }
            String retValue = null;
            try { 
                for (int i = 0; i < cookies.length; i++) { 
                    if (cookies[i].getName().equals(cookieName)) { 
                        if (isDecoder) { //如果涉及中文
                            retValue = URLDecoder.decode(cookies[i].getValue(), "UTF-8");
                        } else { 
                            retValue = cookies[i].getValue();
                        }
                        break;
                    }
                }
            } catch (UnsupportedEncodingException e) { 
                e.printStackTrace();
            }
            return retValue;
        }
        /*** * 设置cookie的值 * @param request * @param response * @param cookieName * @param cookieValue * @param cookieMaxage * @param isEncode */
        public static   void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) { 
            try { 
                if (cookieValue == null) { 
                    cookieValue = "";
                } else if (isEncode) { 
                    cookieValue = URLEncoder.encode(cookieValue, "utf-8");
                }
                Cookie cookie = new Cookie(cookieName, cookieValue);
                if (cookieMaxage >= 0)
                    cookie.setMaxAge(cookieMaxage);
                if (null != request)// 设置域名的cookie
                    cookie.setDomain(getDomainName(request));
                // 在域名的根路径下保存
                cookie.setPath("/");
                response.addCookie(cookie);
            } catch (Exception e) { 
                e.printStackTrace();
            }
        }
        /*** * 获得cookie的主域名，本系统为mall.com，保存时使用 * @param request * @return */
        private static final String getDomainName(HttpServletRequest request) { 
            String domainName = null;
            String serverName = request.getRequestURL().toString();
            if (serverName == null || serverName.equals("")) { 
                domainName = "";
            } else { 
                serverName = serverName.toLowerCase();
                serverName = serverName.substring(7);
                final int end = serverName.indexOf("/");
                serverName = serverName.substring(0, end);
                final String[] domains = serverName.split("\\.");
                int len = domains.length;
                if (len > 3) { 
                    // www.xxx.com.cn
                    domainName = domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
                } else if (len <= 3 && len > 1) { 
                    // xxx.com or xxx.cn
                    domainName = domains[len - 2] + "." + domains[len - 1];
                } else { 
                    domainName = serverName;
                }
            }
            if (domainName != null && domainName.indexOf(":") > 0) { 
                String[] ary = domainName.split("\\:");
                domainName = ary[0];
            }
            System.out.println("domainName = " + domainName);
            return domainName;
        }
        /*** * 将cookie中的内容按照key删除 * @param request * @param response * @param cookieName */
        public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String cookieName) { 
            setCookie(request, response, cookieName, null, 0, false);
        }
    }