Java Cookie工具类代码

  1. 添加cookie（设置有效时间）
  2. 检索所有cookie 封装到map集合 以其cookie name作为key cookie value作为value
  3. 通过cookie name 获取 cookie value
import java.util.HashMap;
import java.util.Map;

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

public class CookieTool {
    /**
     * 添加cookie
     * 
     * @param response
     * @param name
     * @param value
     * @param maxAge 有效时间
     */
    public static void addCookie(HttpServletResponse response, String name, String value, int maxAge) {
        Cookie cookie = new Cookie(name, value);
        cookie.setPath("/");
        cookie.setMaxAge(maxAge);
        cookie.setDomain(".189.cn"); // cookie作用域
        response.addCookie(cookie);
    }

    /**
     * 检索所有cookie 封装到map集合 以其cookie name作为key cookie value作为value
     * 
     * @param request
     * @return
     */
    public static Map<String, String> ReadCookieMap(HttpServletRequest request) {
        Map<String, String> cookieMap = new HashMap<String, String>();
        Cookie[] cookies = request.getCookies();
        if (null != cookies) {
            for (Cookie cookie : cookies) {
                cookieMap.put(cookie.getName(), cookie.getValue());
            }
        }
        return cookieMap;
    }

    /**
     * 通过cookie name 获取 cookie value
     * 
     * @param request
     * @param name
     * @return
     */
    public static String getCookieValueByName(HttpServletRequest request, String name) {
        Map<String, String> cookieMap = ReadCookieMap(request);
        if (cookieMap.containsKey(name)) {
            String cookieValue = (String) cookieMap.get(name);
            return cookieValue;
        } else {
            return null;
        }
    }

}



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import  java.io.IOException;
import  java.util.HashMap;
import  java.util.Map;
 
import  javax.servlet.http.Cookie;
import  javax.servlet.http.HttpServletRequest;
import  javax.servlet.http.HttpServletResponse;
 
public  class  CookieUtils {
     
     public  static  final  int  COOKIE_MAX_AGE =  7  *  24  *  3600 ;
     public  static  final  int  COOKIE_HALF_HOUR =  30  *  60 ;
       
     /**
      * 根据Cookie名称得到Cookie对象，不存在该对象则返回Null
      * 
      * @param request
      * @param name
      * @return
      */ 
     public  static  Cookie getCookie(HttpServletRequest request, String name) { 
         Cookie[] cookies = request.getCookies(); 
         if  (StrUtils.isEmptyArray(cookies)) { 
             return  null ; 
         } 
         Cookie cookie =  null ; 
         for  (Cookie c : cookies) {
             if  (name.equals(c.getName())) { 
                 cookie = c; 
                 break ; 
             } 
         } 
         return  cookie; 
     }
     
     /**
      * 根据Cookie名称直接得到Cookie值
      * 
      * @param request
      * @param name
      * @return
      */ 
     public  static  String getCookieValue(HttpServletRequest request, String name) { 
         Cookie cookie = getCookie(request, name); 
         if (cookie !=  null ){
             return  cookie.getValue();
         }
         return  null ; 
     }
     
     /**
      * 移除cookie
      * @param request
      * @param response
      * @param name 这个是名称，不是值
      */
     public  static  void  removeCookie(HttpServletRequest request, 
             HttpServletResponse response, String name) { 
         if  ( null  == name) { 
             return ; 
         } 
         Cookie cookie = getCookie(request, name); 
         if ( null  != cookie){ 
             cookie.setPath( "/" ); 
             cookie.setValue( "" ); 
             cookie.setMaxAge( 0 ); 
             response.addCookie(cookie);
         } 
     }
     
     /**
      * 添加一条新的Cookie，可以指定过期时间(单位：秒)
      * 
      * @param response
      * @param name
      * @param value
      * @param maxValue
      */ 
     public  static  void  setCookie(HttpServletResponse response, String name, 
             String value,  int  maxValue) { 
         if  (StrUtils.isBlank(name)) { 
             return ; 
         } 
         if  ( null  == value) { 
             value =  "" ; 
         } 
         Cookie cookie =  new  Cookie(name, value); 
         cookie.setPath( "/" ); 
         if  (maxValue !=  0 ) { 
             cookie.setMaxAge(maxValue); 
         }  else  { 
             cookie.setMaxAge(COOKIE_HALF_HOUR); 
         } 
         response.addCookie(cookie);
         try  {
             response.flushBuffer();
         }  catch  (IOException e) {
             e.printStackTrace();
         }
     }
     
     /**
      * 添加一条新的Cookie，默认30分钟过期时间
      * 
      * @param response
      * @param name
      * @param value
      */ 
     public  static  void  setCookie(HttpServletResponse response, String name, 
             String value) { 
         setCookie(response, name, value, COOKIE_HALF_HOUR); 
     } 
  
     /**
      * 将cookie封装到Map里面
      * @param request
      * @return
      */
     public  static  Map<String,Cookie> getCookieMap(HttpServletRequest request){ 
         Map<String,Cookie> cookieMap =  new  HashMap<String,Cookie>();
         Cookie[] cookies = request.getCookies();
         if (!StrUtils.isEmptyArray(cookies)){
             for (Cookie cookie : cookies){
                 cookieMap.put(cookie.getName(), cookie);
             }
         }
         return  cookieMap;
     }
     
     
}