把一个对象序列化后保存到cookie

下面是把把整个购物车对象序列化为字符串放入Cookie进行存取的方式:

 

存储代码:

private   void  saveCartToCookie(Cart cart)  ... {
        
try   ... {
                 ByteArrayOutputStream baos 
=   new  ByteArrayOutputStream();
              ObjectOutputStream oos 
=   new  ObjectOutputStream(baos);
              oos.writeObject(cart);
            String cookieValue 
=  baos.toString( " ISO-8859-1 " );
            String encodedCookieValue 
=  java.net.URLEncoder.encode(cookieValue,
                    
" UTF-8 " );
            Cookie cookie 
=   new  Cookie(CART_COOKIE_FLAG, encodedCookieValue);
            cookie.setSecure(
false );
            cookie.setPath(getCartCookiePath());
            cookie.setMaxAge(COOKIE_MAX_AGE);
            getResponse().addCookie(cookie);
        }
  catch  (Exception e)  ... {
            log.error(
" 保 存购物车到cookie出错: "   +  e.getMessage());
        }

    }

 

 

读取代码:

private  Cart getCartFromCookie()  ... {
        Cookie cookie 
=  getCartCookie();
        
if  (cookie  ==   null ... {
            
return
null ;
        }


        String cookieValue 
=  cookie.getValue();
        
if  (StringUtils.isEmpty(cookieValue))
            
return   null ;
        
try   ... {
            String decoderCookieValue 
=  java.net.URLDecoder.decode(cookieValue,
                    
" UTF-8 " );
                 Cart result 
=   new  Cart();

                             ByteArrayInputStream bais 
=   new  ByteArrayInputStream(cookieValue
                .getBytes(
" ISO-8859-1 " ));
                            ObjectInputStream ios 
=   new  ObjectInputStream(bais);
                             result 
=  (Cart) ios.readObject();
            
return  result;
        }
  catch  (Exception e)  ... {
            log.error(
" 从 cookie中解析购物车出错: "   +  e.getMessage());
            
return   null ;
        }

    }

 

在序列化时主要是要注意两个部分,首先是先把序列化的字节流转换为ISO-8859-1编码方式的字符串,然后就是再把该字符串编码为UTF-8格式进行 传输。

你可能感兴趣的:(ios,.net)