content: package net.laoyeye.yyblog.common.utils;
  
  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
   * @author 小卖铺的老爷爷
   * @date 2015年3月19日
   * @website www.laoyeye.net
   */
  public final class CookieUtils {
  
      /**
       * 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)) {
                  	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 {
              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];
          }
          return domainName;
      }
  
  }
  