@RequestMapping(value = "/uploadOrgid", method = RequestMethod.POST, produces = "text/html;charset=UTF-8")  
    @ResponseBody  
    public String uploadOrgid(Model model, MultipartHttpServletRequest multipartRequest,HttpServletResponse response) throws Exception {  
        MessageBean mess = new MessageBean();  
        StringBuffer str = new StringBuffer();  
        for (Iterator it = multipartRequest.getFileNames(); it.hasNext();) {  
            String key = (String) it.next();  
            MultipartFile file = multipartRequest.getFile(key);  
            try {  
                InputStream ins = file.getInputStream();  
                BufferedInputStream bfs = new BufferedInputStream(ins);  
                String code = codeString(bfs);  
                InputStream insm = file.getInputStream();  
                               //InputStreamReader 要用insm沒有去查詢過編碼的 InputStream 才行,如果用ins 讀不到資料  
                               InputStreamReader in = new InputStreamReader(insm,code);  
                BufferedReader reader = new BufferedReader(in);  
                  
                String tempString = null;  
                // 一次讀入一行，直到讀入null為檔案結束  
                while ((tempString = reader.readLine()) != null) {  
                    str.append(tempString.trim()).append(",");  
                }  
                reader.close();  
            } catch (IOException e) {  
                logger.error(e.getMessage());  
                mess.setCode("500");  
                mess.setContent("讀取商戶號失敗");  
                return gson.toJson(mess);  
            }  
  
        }  
        if (str.length() > 0) {  
            str.deleteCharAt(str.length() - 1);  
        }  
        mess.setCode("200");  
                mess.setContent(str.toString());  
        return gson.toJson(mess);  
    }  
  
    /** 
     * 判斷檔案的編碼格式 
     * @param fileName :file 
     * @return 檔案編碼格式 
     * @throws Exception 
     */  
    private String codeString(BufferedInputStream bin) throws Exception{  
        int p = (bin.read() << 8) + bin.read();  
        String code = null;  
          
        switch (p) {  
            case 0xefbb:  
                code = "UTF-8";  
                break;  
            case 0xfffe:  
                code = "Unicode";  
                break;  
            case 0xfeff:  
                code = "UTF-16BE";  
                break;  
            default:  
                code = "GBK";  
        }  
          
        return code;  
    }