cookie先天不能写中文，令人很郁闷下面的方法可以解决

import java.net.*;
String   key=URLEncoder.encode("中文key","GBK");
String   value=URLEncoder.encode("中文value","GBK");
Cookie   cook=new Cookie(key,value);    
String   key=cook.getName(),value=cook.getValue();  
key=URLDecoder.decode(key,"GBK");  
value=URLDecoder.decode(value,"GBK");