spring-mvc-boot-8 model and view data model

First, the parameter binding 

     Parameters automatically bind Model class data] 

       Application springMVC, if used ModelAndView, Model, ModelMap method in parameters of the controller as a parameter, springMVC automatically creates a data model objects. 
Second, the data model

     [Model] [Model + View View data / user]

       Model Model: for a place to store data  .   View View: shows users.

     

       View View: springMVC view into logical in view PDF view + JSON view + Excel view + JSTL View and non-logical view.

• = Logical view requires view resolver (ViewResolver) is positioned. Find a view, the data model rendering show. Return a string such as targeting jsp.
• = Non logical view no need to locate the position of the view, rendering directly.

    View Interface: Get Response Type + Render

public interface View{
      //响应状态属性
      String RESPONSE_STATUS_ATTRIBUTE = View.class.getName() + ".responseStatus"; 
      //路径变量
      String PATH_VARIABLES = View.class.getName() + ".pathVariables";
      //选择内容类型
      String SELECTED_CONTENT_TYPE = View.class.getName() + ".selectedContentType";
      
      //HTTP响应类型  获取HTTP响应类型，可以是文本、JSON、文件。
      String getContentType();  
      //渲染方法      将数据模型渲染到视图。
      void render(model,request,response);
}