package com.ycsoft.commons.helper;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* WEB辅助类，包括Servlet 四大作用域的处理
*
* @author hh
* @date Dec 3, 2009 1:27:02 PM
* @see javax.servlet.http.HttpServletRequest
*/
public class WebHelper {
private WebHelper(){
}
/**
* 通过名称，获取客户端的Cookie
* @param request
*/
public static Cookie getCookie( HttpServletRequest request , String key ){
Cookie[] cookies = request.getCookies();
if( null == cookies){
return null ;
}
for (Cookie ck : cookies) {
if ( ck.getName().equals( key ) ){
return ck ;
}
}
return null ;
}
/**
* 通过请求与名称，获取客户端的Cookie value值
*
* @param request
* @param key
* @return
*/
public static String getCookieValue( HttpServletRequest request , String key ){
Cookie ck = getCookie(request, key);
if(null != ck){
return ck.getValue() ;
}
return null ;
}
/**
* 添加cookie , 默认保存一年
* @param response
* @param name
* @param value
*/
public static void addCookieAndOneYear(HttpServletResponse response , String name , String value){
addCookie(response, name, value , 365 * 24 * 3600 );
}
/**
* 添加cookie
* @param response
* @param name
* @param value
* @param ex 期限
*/
public static void addCookie(HttpServletResponse response , String name , String value, int ex){
Cookie ck = new Cookie( name ,value);
ck.setMaxAge( ex );
response.addCookie( ck );
}
}