在jsp中作HTTP认证的方法_MySQL

    最近研究了jsp中作HTTP认证的问题，它的工作方式如下：

          *

end of data

          * we don''t try to stop the converion when we find the"="end of data padding char.
          * we simply add zero bytes to the unencode buffer.
        */
        public static String decode(String encoded)

        {
                StringBuffer sb=new StringBuffer();
                int maxturns;
                //work out how long to loop for.
                if(encoded.length()%3==0)
                maxturns=encoded.length();
                else
                maxturns=encoded.length()+(3-(encoded.length()%3));
                //tells us whether to include the char in the unencode
                boolean skip;
                //the unencode buffer
                byte[] unenc=new byte[4];
                byte b;