public class CookieUtil {
/**
* 设置cookie
* @param name cookie名字
* @param value cookie值
* @param maxAge cookie生命周期 以秒为单位
*/
public static void addCookie(HttpServletResponse res,String name,String value,String domain,int maxAge){
try {
value = URLEncoder.encode(""+value, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Cookie cookie = new Cookie(name, value + "" );
cookie.setPath("/");
cookie.setDomain(domain);
if(maxAge>0) cookie.setMaxAge(maxAge);
res.addCookie(cookie);
}
/**
* 根据名字获取cookie
* @param name cookie名字
* @return
*/
public static Cookie getCookieByName(HttpServletRequest req,String name){
Map<String,Cookie> cookieMap = getCookieMap(req);
if(cookieMap.containsKey(name)){
Cookie cookie = (Cookie)cookieMap.get(name);
return cookie;
}else{
return null;
}
}
/**
* 将cookie封装到Map里面
* @return
*/
private static Map<String,Cookie> getCookieMap(HttpServletRequest req){
Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();
Cookie[] cookies = req.getCookies();
if(null!=cookies){
for(Cookie cookie : cookies){
cookieMap.put(cookie.getName(), cookie);
}
}
return cookieMap;
}
public static boolean deleteCookie(HttpServletRequest req,HttpServletResponse res,String cookieName) {
if (cookieName != null) {
Cookie cookie = getCookie(req,cookieName);
if(cookie!=null){
cookie.setMaxAge(0);//0，就立即删除
cookie.setPath("/");//不要漏掉
cookie.setDomain(req.getServerName());
res.addCookie(cookie);
return true;
}
}
return false;
}
public static String getValue(HttpServletRequest req,String cookieName){
Cookie cookie = getCookie(req,cookieName);
return getValue(cookie);
}
public static String getValue(Cookie cookie){
if(null == cookie) return null;
try {
return URLDecoder.decode(cookie.getValue(), "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
public static Cookie getCookie(HttpServletRequest req,String cookieName){
Cookie[] cookies = req.getCookies();
Cookie cookie = null;
try {
if (cookies != null && cookies.length > 0) {
for (int i = 0; i < cookies.length; i++) {
cookie = cookies[i];
if (cookie.getName().equals(cookieName)) {
return cookie;
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}关于cookie util