java对cookie的操作

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HttpServletRequest request 

HttpServletResponse response

Cookie cookie = new Cookie("cookiename","cookievalue");

response.addCookie(cookie);

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cookie = new Cookie("cookiename","cookievalue");

cookie.setMaxAge(3600);

//设置路径，这个路径即该工程下都可以访问该cookie 如果不设置路径，那么只有设置该cookie路径及其子路径可以访问

cookie.setPath("/");

response.addCookie(cookie);

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Cookie[] cookies = request.getCookies();//这样便可以获取一个cookie数组

for(Cookie cookie : cookies){

    cookie.getName();// get the cookie name

    cookie.getValue(); // get the cookie value

}

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/**

 * 设置cookie

 * @param response

 * @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 response,String name,String value,int maxAge){

    Cookie cookie = new Cookie(name,value);

    cookie.setPath("/");

    if(maxAge>0)  cookie.setMaxAge(maxAge);

    response.addCookie(cookie);

}

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/**

 * 根据名字获取cookie

 * @param request

 * @param name cookie名字

 * @return

 */

public static Cookie getCookieByName(HttpServletRequest request,String name){

    Map<String,Cookie> cookieMap = ReadCookieMap(request);

    if(cookieMap.containsKey(name)){

        Cookie cookie = (Cookie)cookieMap.get(name);

        return cookie;

    }else{

        return null;

    }  

}

/**

 * 将cookie封装到Map里面

 * @param request

 * @return

 */

private static Map<String,Cookie> ReadCookieMap(HttpServletRequest request){ 

    Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();

    Cookie[] cookies = request.getCookies();

    if(null!=cookies){

        for(Cookie cookie : cookies){

            cookieMap.put(cookie.getName(), cookie);

        }

    }

    return cookieMap;

}