让控制器继承SimpleFormController
重写initBinder方法
    @InitBinder
    protected void initBinder(HttpServletRequest request,
        ServletRequestDataBinder binder) throws Exception {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
        CustomDateEditor dateEditor = new CustomDateEditor(fmt, true);
        binder.registerCustomEditor(Date.class, dateEditor);
        super.initBinder(request, binder);
    }

让控制器继承SimpleFormController
重写initBinder方法
    @InitBinder
    protected void initBinder(HttpServletRequest request,
        ServletRequestDataBinder binder) throws Exception {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
        CustomDateEditor dateEditor = new CustomDateEditor(fmt, true);
        binder.registerCustomEditor(Date.class, dateEditor);
        super.initBinder(request, binder);
    }