编码检测 和 转换

def detect_encode
require 'hpricot'
require 'open-uri'
 @doc = open("http://www.baidu.com") { |f| Hpricot(f) }
     guess_res = NKF.guess(@doc.to_s)
     case guess_res
     when NKF::SJIS
       @encode = "Shift_JIS"
     when NKF::EUC
       @encode = "EUC"
     when NKF::JIS
       @encode = "JIS"
     when NKF::UTF8
       @encode = "UTF-8"
     end
  pp @encode # 取得编码
end

编码转换

def self.convert_char_encoding(encoding, data)
   begin
     case encoding
       when 'jis'
         return Kconv.tojis(data)
       when 'Shfit-JIS'
         return Kconv.tosjis(data)
       when 'EUC-JP'
         return Kconv.toeuc(data)
       when 'UTF-8'
         return Kconv.toutf8(data)
       else
         exit(1)
     end
   rescue SystemExit => e
     p 'set invalid charcter encoding or nil.'
     exit(0)
   end
end