操作 Cookie 的Java工具类

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import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * @Package: com.xxxxx.common.util
 * @Title: Cookie.java Create on 2012-1-25 下午5:23:52
* @Description:
 *
*  Cookie工具类,封装Cookie常用操作
 *
* @author carrkevin
 * @version v 0.1
 */
public class CookieHelper {
/**
* 设置cookie有效期,根据需要自定义[本系统设置为30天]
*/
private final static int COOKIE_MAX_AGE = 1000 * 60 * 60 * 24 * 30;
/**
*
* @desc 删除指定Cookie
* @param response
* @param cookie
*/
public static void removeCookie(HttpServletResponse response, Cookie cookie)
{
if (cookie != null)
{
cookie.setPath("/");
cookie.setValue("");
cookie.setMaxAge(0);
response.addCookie(cookie);
}
}
/**
*
* @desc 删除指定Cookie
* @param response
* @param cookie
* @param domain
*/
public static void removeCookie(HttpServletResponse response, Cookie cookie,String domain)
{
if (cookie != null)
{
cookie.setPath("/");
cookie.setValue("");
cookie.setMaxAge(0);
cookie.setDomain(domain);
response.addCookie(cookie);
}
}
/**
*
* @desc 根据Cookie名称得到Cookie的值,没有返回Null
* @param request
* @param name
* @return
*/
public static String getCookieValue(HttpServletRequest request, String name)
{
Cookie cookie = getCookie(request, name);
if (cookie != null)
{
return cookie.getValue();
}
else
{
return null;
}
}
/**
*
* @desc 根据Cookie名称得到Cookie对象,不存在该对象则返回Null
* @param request
* @param name
*/
public static Cookie getCookie(HttpServletRequest request, String name)
{
Cookie cookies[] = request.getCookies();
if (cookies == null || name == null || name.length() == 0)
return null;
Cookie cookie = null;
for (int i = 0; i < cookies.length; i++)
{
if (!cookies[i].getName().equals(name))
continue;
cookie = cookies[i];
if (request.getServerName().equals(cookie.getDomain()))
break;
}
return cookie;
}
/**
*
* @desc 添加一条新的Cookie信息,默认有效时间为一个月
* @param response
* @param name
* @param value
*/
public static void setCookie(HttpServletResponse response, String name, String value)
{
setCookie(response, name, value, COOKIE_MAX_AGE);
}
/**
*
* @desc 添加一条新的Cookie信息,可以设置其最长有效时间(单位:秒)
* @param response
* @param name
* @param value
* @param maxAge
*/
public static void setCookie(HttpServletResponse response, String name, String value, int maxAge)
{
if (value == null)
value = "";
Cookie cookie = new Cookie(name, value);
if(maxAge!=0){
cookie.setMaxAge(maxAge);
}else{
cookie.setMaxAge(COOKIE_MAX_AGE);
}
cookie.setPath("/");
response.addCookie(cookie);
}
}

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