public class DateConvert implements Converter {

    @Override
    public Object convert(Class arg0, Object value) {
        if(value==null){
            return value;
        }
        if(value instanceof Date){
            return value;
        }
        Date d=null;
        if(value instanceof String){
            SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
            try {
                d=sdf.parse(value.toString());
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return d;
    }

}