cookie的读写
importjava.io.UnsupportedEncodingException;
importjava.net.URLDecoder;
importjava.net.URLEncoder;
importjavax.servlet.http.Cookie;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
/**
*
* Cookie 工具类
*
*/
publicfinalclassCookieUtils{
/**
* 得到Cookie的值, 不编码
*
*@paramrequest
*@paramcookieName
*@return
*/
publicstaticStringgetCookieValue(HttpServletRequest request, String cookieName){
returngetCookieValue(request, cookieName,false);
}
/**
* 得到Cookie的值,
*
*@paramrequest
*@paramcookieName
*@return
*/
publicstaticStringgetCookieValue(HttpServletRequest request, String cookieName,booleanisDecoder){
Cookie[] cookieList = request.getCookies();
if(cookieList ==null|| cookieName ==null) {
returnnull;
}
String retValue =null;
try{
for(inti =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();
}
returnretValue;
}
/**
* 得到Cookie的值,
*
*@paramrequest
*@paramcookieName
*@return
*/
publicstaticStringgetCookieValue(HttpServletRequest request, String cookieName, String encodeString){
Cookie[] cookieList = request.getCookies();
if(cookieList ==null|| cookieName ==null) {
returnnull;
}
String retValue =null;
try{
for(inti =0; i < cookieList.length; i++) {
if(cookieList[i].getName().equals(cookieName)) {
retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
break;
}
}
}catch(UnsupportedEncodingException e) {
e.printStackTrace();
}
returnretValue;
}
/**
* 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
*/
publicstaticvoidsetCookie(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
*/
publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
String cookieValue,intcookieMaxage){
setCookie(request, response, cookieName, cookieValue, cookieMaxage,false);
}
/**
* 设置Cookie的值 不设置生效时间,但编码
*/
publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
String cookieValue,booleanisEncode){
setCookie(request, response, cookieName, cookieValue, -1, isEncode);
}
/**
* 设置Cookie的值 在指定时间内生效, 编码参数
*/
publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
String cookieValue,intcookieMaxage,booleanisEncode){
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)
*/
publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
String cookieValue,intcookieMaxage, String encodeString){
doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
}
/**
* 删除Cookie带cookie域名
*/
publicstaticvoiddeleteCookie(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
*
*@paramcookieMaxage cookie生效的最大秒数
*/
privatestaticfinalvoiddoSetCookie(HttpServletRequest request, HttpServletResponse response,
String cookieName, String cookieValue,intcookieMaxage,booleanisEncode){
try{
if(cookieValue ==null) {
cookieValue ="";
}elseif(isEncode) {
cookieValue = URLEncoder.encode(cookieValue,"utf-8");
}
Cookie cookie =newCookie(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
*
*@paramcookieMaxage cookie生效的最大秒数
*/
privatestaticfinalvoiddoSetCookie(HttpServletRequest request, HttpServletResponse response,
String cookieName, String cookieValue,intcookieMaxage, String encodeString){
try{
if(cookieValue ==null) {
cookieValue ="";
}else{
cookieValue = URLEncoder.encode(cookieValue, encodeString);
}
Cookie cookie =newCookie(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
*/
privatestaticfinalStringgetDomainName(HttpServletRequest request){
String domainName =null;
String serverName = request.getRequestURL().toString();
if(serverName ==null|| serverName.equals("")) {
domainName ="";
}else{
serverName = serverName.toLowerCase();
serverName = serverName.substring(7);
finalintend = serverName.indexOf("/");
serverName = serverName.substring(0, end);
finalString[] domains = serverName.split("\\.");
intlen = domains.length;
if(len >3) {
// www.xxx.com.cn
domainName ="."+ domains[len -3] +"."+ domains[len -2] +"."+ domains[len -1];
}elseif(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];
}
returndomainName;
}
}