CookieUtils

public class CookieUtils {
//根据名字获取cookie
public static Cookie getCookieByName(HttpServletRequest request,String name){
//从map中读取cookie
Map<String, Cookie> cookieMap=ReadCookieMap(request);
//如果map里面key包含cookie的名字，返回cookie，否则返回null
if (cookieMap.containsKey(name)) {
Cookie cookie = cookieMap.get(name);
return cookie;
}
return null;
}


//将cookie封装到Map集合中
private static Map<String, Cookie> ReadCookieMap(HttpServletRequest request) {
//创建Map集合
Map<String, Cookie> map=new HashMap<String,Cookie>();
//从reqeust中获取所有cookie
Cookie[] cookies = request.getCookies();
if (null!=cookies) {
//遍历cookie
for (Cookie cookie : cookies) {
map.put(cookie.getName(),cookie);
}
}
return map;
}

}