一. Spring offers two JSP tag libraries to help define the view of your Spring MVC web views. One tag library renders HTML form tags that are bound to a model attribute. The other has a hodgepodge of utility tags that come in handy from time to time.
定义和用法 value 属性规定与按钮关联的初始值.请始终为按钮规定 type 属性,如果不填默认值是 "submit".submit其实就是一个特殊的button. <button name="subject" type="submit" value="HTML">CSS</button> 重要事项:如果在 HTML 表单中使用 button 元素,浏览器将提交 value 属性的内容HTML. &l