Java实现对cookie的增删改查

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1. [java] view plain
   
2. /** 
3.          * 读取所有cookie 
4.          * 注意二、从客户端读取Cookie时，包括maxAge在内的其他属性都是不可读的，也不会被提交。
5.  * 浏览器提交Cookie时只会提交name与value属性。maxAge属性只被浏览器用来判断Cookie是否过期 
6.          * @param request 
7.          * @param response 
8.          */  
9.         @RequestMapping("/showCookies")  
10.         public void showCookies(HttpServletRequest request,HttpServletResponse response ){  
11.                
12.             Cookie[] cookies = request.getCookies();//这样便可以获取一个cookie数组  
13.             if (null==cookies) {  
14.                 System.out.println("没有cookie=========");  
15.             } else {  
16.                 for(Cookie cookie : cookies){  
17.                     System.out.println("name:"+cookie.getName()+",value:"+ cookie.getValue());  
18.                 }  
19.             }  
20.                
21.         }    

iew plain[java] view plaincopy

1. [java] view plain
2. /** 
3.          * 添加cookie 
4.          * @param response 
5.          * @param name 
6.          * @param value 
7.          */  
8.         @RequestMapping("/addCookie")  
9.         public void addCookie(HttpServletResponse response,String name,String value){  
10.             Cookie cookie = new Cookie(name.trim(), value.trim());  
11.             cookie.setMaxAge(30 * 60);// 设置为30min  
12.             cookie.setPath("/");  
13.             System.out.println("已添加===============");  
14.             response.addCookie(cookie);  
15.         }  

1. [java] view plain
   
2. /** 
3.         * 修改cookie 
4.         * @param request 
5.         * @param response 
6.         * @param name 
7.         * @param value 
8.         * 注意一、修改、删除Cookie时，新建的Cookie除value、maxAge之外的所有属性，例如name、path、domain等，
9. * 都要与原Cookie完全一样。否则，浏览器将视为两个不同的Cookie不予覆盖，导致修改、删除失败。 
10.         */  
11.        @RequestMapping("/editCookie")  
12.        public void editCookie(HttpServletRequest request,HttpServletResponse response,String name,String value){  
13.            Cookie[] cookies = request.getCookies();  
14.            if (null==cookies) {  
15.                System.out.println("没有cookie==============");  
16.            } else {  
17.                for(Cookie cookie : cookies){  
18.                    if(cookie.getName().equals(name)){  
19.                        System.out.println("原值为:"+cookie.getValue());  
20.                        cookie.setValue(value);  
21.                        cookie.setPath("/");  
22.                        cookie.setMaxAge(30 * 60);// 设置为30min  
23.                        System.out.println("被修改的cookie名字为:"+cookie.getName()+",新值为:"+cookie.getValue());  
24.                        response.addCookie(cookie);  
25.                        break;  
26.                    }  
27.                }  
28.            }  
29.               
30.        }   copy

1. [java] view plain
2. /** 
3.          * 删除cookie 
4.          * @param request 
5.          * @param response 
6.          * @param name 
7.          */  
8.         @RequestMapping("/delCookie")  
9.         public void delCookie(HttpServletRequest request,HttpServletResponse response,String name){  
10.             Cookie[] cookies = request.getCookies();  
11.             if (null==cookies) {  
12.                 System.out.println("没有cookie==============");  
13.             } else {  
14.                 for(Cookie cookie : cookies){  
15.                     if(cookie.getName().equals(name)){  
16.                         cookie.setValue(null);  
17.                         cookie.setMaxAge(0);// 立即销毁cookie  
18.                         cookie.setPath("/");  
19.                         System.out.println("被删除的cookie名字为:"+cookie.getName());  
20.                         response.addCookie(cookie);  
21.                         break;  
22.                     }  
23.                 }  
24.             }  
25.         }  

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1. [java] view plain
2.      /** 
3.      * 根据名字获取cookie 
4.      * @param request 
5.      * @param name cookie名字 
6.      * @return 
7.      */  
8.     public  Cookie getCookieByName(HttpServletRequest request,String name){  
9.         Map<String,Cookie> cookieMap = ReadCookieMap(request);  
10.         if(cookieMap.containsKey(name)){  
11.             Cookie cookie = (Cookie)cookieMap.get(name);  
12.             return cookie;  
13.         }else{  
14.             return null;  
15.         }    
16.     }  

[java] view plain copy

1.     /** 
2.     * 将cookie封装到Map里面 
3.     * @param request 
4.     * @return 
5.     */  
6.    private  Map<String,Cookie> ReadCookieMap(HttpServletRequest request){   
7.        Map<String,Cookie> cookieMap = new HashMap<String,Cookie>();  
8.        Cookie[] cookies = request.getCookies();  
9.        if(null!=cookies){  
10.            for(Cookie cookie : cookies){  
11.                cookieMap.put(cookie.getName(), cookie);  
12.            }  
13.        }  
14.        return cookieMap;  
15.    }