Cookie操作Java工具類

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**

@author HuifengWang 操作cookie的工具類
*/
public class CookieUtil {
 /**

根據cookie的名稱獲取cookie
@param request
@param name
@return
*/
public static Cookie getCookie(HttpServletRequest request, String name) {
 Cookie cookies[] = request.getCookies();
 if (cookies == null || name == null || name.length() == 0) {

 return null;

}
 for (int i = 0; i < cookies.length; i++) {

 if (name.equals(cookies[i].getName())){
         //&& request.getServerName().equals(cookies[i].getDomain())) {
     return cookies[i];
 }

}
 return null;
}
public static String getCookieValue(HttpServletRequest request, String name){
 Cookie ck = getCookie(request, name);
 if(ck!=null){

 return PwdCrypt.decrypt(ck.getValue());

}else{

 return null;

}
}
/**

刪除cookie
@param request
@param response
@param cookie
*/
public static void deleteCookie(HttpServletRequest request,

 HttpServletResponse response, Cookie cookie) {

if (cookie != null) {

 cookie.setPath(getPath(request));
 cookie.setValue("");
 cookie.setMaxAge(0);
 response.addCookie(cookie);

}
}
/**

設置cookie
@param request
@param response
@param name
@param value
如果不設置時間，默認永久
*/
public static void setCookie(HttpServletRequest request,

 HttpServletResponse response, String name, String value) {

setCookie(request, response, name, value, 0x278d00);
}
/**

@param request
@param response
@param name
@param value
@param maxAge
設置cookie，設定時間
*/
public static void setCookie(HttpServletRequest request,

 HttpServletResponse response, String name, String value, int maxAge) {

String cookieValue = PwdCrypt.encrypt(value);
 Cookie cookie = new Cookie(name, value == null ? "" : cookieValue.replaceAll("\r\n", ""));
 cookie.setMaxAge(maxAge);
 cookie.setPath(getPath(request));
 response.addCookie(cookie);
}
private static String getPath(HttpServletRequest request) {
 String path = request.getContextPath();
 return (path == null || path.length() == 0) ? "/" : path;
}
public static void main(String[] args) {
}
}</pre>