浏览器访问本地 cookie没问题，然后部署上服务器，cookie就不生成了，用的cookie 工具类

问题遇到的现象和发生背景

为什么用浏览器访问本地 cookie没问题，然后部署上服务器，cookie就不生成了，用的cookie 工具类

问题相关代码

这是cookie工具类
package com.yc.seckill.utils;

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;

/**

Cookie工具类
@author yc
@since 1.0.0

/
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)) {
          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;
// 通过request对象获取访问的url地址
String serverName = request.getRequestURL().toString();
if (serverName == null || serverName.equals("")) {

  domainName = "";

} else {

  // 将url地下转换为小写
  serverName = serverName.toLowerCase();
  // 如果url地址是以http://开头  将http://截取
  if (serverName.startsWith("http://")) {
      serverName = serverName.substring(7);
  }
  int end = serverName.length();
  // 判断url地址是否包含"/"
  if (serverName.contains("/")) {
      //得到第一个"/"出现的位置
      end = serverName.indexOf("/");
  }

  // 截取
  serverName = serverName.substring(0, end);
  // 根据"."进行分割
  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;
}
}

后来仔细看了下cookieutils,发现它截取字符时有问题

多打日志看下了

浏览器访问本地 cookie没问题 ，然后部署上服务器，cookie就不生成了，用的cookie 工具类

问题遇到的现象和发生背景

问题相关代码

浏览器访问本地 cookie没问题，然后部署上服务器，cookie就不生成了，用的cookie 工具类