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 finalclass 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 finalvoid 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 finalvoid 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);
finalint 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;
}

}