CookieUtils

系统管理员 2022-05-13 10:28 81阅读 0赞

import java.io.UnsupportedEncodingException;
    import java.net.URLDecoder;
    import java.net.URLEncoder;
    import javax.servlet.http.Cookie;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    /**
     *
     * Cookie 工具类
     *
     */
    public final class CookieUtil {
    
      /**
       * 得到Cookie的值, 不编码
       *
       * @param request
       * @param cookieName
       * @return
       */
      public static String getCookieValue(HttpServletRequest request, String cookieName) {
        return getCookieValue(request, cookieName, false);
      }
    
      /**
       * 得到Cookie的值,
       *
       * @param request
       * @param cookieName
       * @return
       */
      public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
          return null;
        }
        String retValue = null;
        try {
          for (int i = 0; i < cookieList.length; i++) {
            if (cookieList[i].getName().equals(cookieName)) {
              if (isDecoder) {
                retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
              } else {
                retValue = cookieList[i].getValue();
              }
              break;
            }
          }
        } catch (UnsupportedEncodingException e) {
          e.printStackTrace();
        }
        return retValue;
      }
    
      /**
       * 得到Cookie的值,
       *
       * @param request
       * @param cookieName
       * @return
       */
      public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
          return null;
        }
        String retValue = null;
        try {
          for (int i = 0; i < cookieList.length; i++) {
            if (cookieList[i].getName().equals(cookieName)) {
              retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
              break;
            }
          }
        } catch (UnsupportedEncodingException e) {
          e.printStackTrace();
        }
        return retValue;
      }
    
      /**
       * 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
       */
      public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
          String cookieValue) {
        setCookie(request, response, cookieName, cookieValue, -1);
      }
    
      /**
       * 设置Cookie的值 在指定时间内生效,但不编码
       */
      public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
          String cookieValue, int cookieMaxage) {
        setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
      }
    
      /**
       * 设置Cookie的值 不设置生效时间,但编码
       */
      public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
          String cookieValue, boolean isEncode) {
        setCookie(request, response, cookieName, cookieValue, -1, isEncode);
      }
    
      /**
       * 设置Cookie的值 在指定时间内生效, 编码参数
       */
      public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
          String cookieValue, int cookieMaxage, boolean isEncode) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
      }
    
      /**
       * 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
       */
      public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
          String cookieValue, int cookieMaxage, String encodeString) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
      }
    
      /**
       * 删除Cookie带cookie域名
       */
      public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,
          String cookieName) {
        doSetCookie(request, response, cookieName, "", -1, false);
      }
    
      /**
       * 设置Cookie的值，并使其在指定时间内生效
       *
       * @param cookieMaxage cookie生效的最大秒数
       */
      private static final void doSetCookie(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
            String domainName = getDomainName(request);
            System.out.println(domainName);
            if (!"localhost".equals(domainName)) {
              //cookie.setDomain(domainName);
            }
          }
          cookie.setPath("/");
          response.addCookie(cookie);
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    
      /**
       * 设置Cookie的值，并使其在指定时间内生效
       *
       * @param cookieMaxage cookie生效的最大秒数
       */
      private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
          String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
        try {
          if (cookieValue == null) {
            cookieValue = "";
          } else {
            cookieValue = URLEncoder.encode(cookieValue, encodeString);
          }
          Cookie cookie = new Cookie(cookieName, cookieValue);
          if (cookieMaxage > 0)
            cookie.setMaxAge(cookieMaxage);
          if (null != request) {// 设置域名的cookie
            String domainName = getDomainName(request);
            System.out.println(domainName);
            if (!"localhost".equals(domainName)) {
              //本地测试的时候不要写.实际发布时在打开
              //cookie.setDomain(domainName);
            }
          }
          cookie.setPath("/");
          response.addCookie(cookie);
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    
      /**
       * 得到cookie的域名
       */
      private static final String getDomainName(HttpServletRequest request) {
        String domainName = null;
    
        String serverName = request.getRequestURL().toString();
        if (serverName == null || serverName.equals("")) {
          domainName = "";
        } else {
          final int end = serverName.lastIndexOf("/");
          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];
        }
        return domainName;
      }
    
    }