protected Date Transform(String str){
        Date d = null;
        System.out.println("转换函数接收到："+str);
                try {
            d = DateFormat.getDateInstance().parse(str);
                           System.out.println("转换函数输出："+d);
            
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        return d;
    }