Springmvc learning notes (3)-annotation processor mappers and adapters

Springmvc learning notes (3)-annotation processor mappers and adapters
Springmvc learning notes (3)-annotation processor mappers and adapters

This article mainly introduces the annotation processor er and adapter Configuration

Load by default

Front-end controller from\org\springframework\web\servlet\DispatcherServlet.propertiesContains components such as the processor er, adapter, and view parser. If not configured in springmvc. xml, the default loaded

Annotation processor er and adapter

Used before spring3.1 org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMappingAnnotation er. Use after spring3.1 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMappingAnnotation er. Used before spring3.1 org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapterAnnotation adapter. Use after spring3.1 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapterAnnotation adapter annotation processor er and adapter

<code class="language-xml hljs "><!--{cke_protected}{C}%3C!%2D%2D%20%E6%B3%A8%E8%A7%A3%E7%9A%84%E6%98%A0%E5%B0%84%E5%99%A8%20%2D%2D%3E-->    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"><!--{cke_protected}{C}%3C!%2D%2D%20%E6%B3%A8%E8%A7%A3%E7%9A%84%E9%80%82%E9%85%8D%E5%99%A8%20%2D%2D%3E-->    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean></bean></code>

Or

<code class="language-xml hljs ">    <!--{cke_protected}{C}%3C!%2D%2D%20%E4%BD%BF%E7%94%A8mvc%3Aannotation-driven%E4%BB%A3%E6%9B%BF%E4%B8%8A%E9%9D%A2%E4%B8%A4%E4%B8%AA%E6%B3%A8%E8%A7%A3%E6%98%A0%E5%B0%84%E5%99%A8%E5%92%8C%E6%B3%A8%E8%A7%A3%E9%80%82%E9%85%8D%E7%9A%84%E9%85%8D%E7%BD%AE%0A%20%20%20%20%20mvc%3Aannotation-driven%E9%BB%98%E8%AE%A4%E5%8A%A0%E8%BD%BD%E5%BE%88%E5%A4%9A%E7%9A%84%E5%8F%82%E6%95%B0%E7%BB%91%E5%AE%9A%E6%96%B9%E6%B3%95%EF%BC%8C%0A%20%20%20%20%20%E6%AF%94%E5%A6%82json%E8%BD%AC%E6%8D%A2%E8%A7%A3%E6%9E%90%E5%99%A8%E9%BB%98%E8%AE%A4%E5%8A%A0%E8%BD%BD%E4%BA%86%EF%BC%8C%E5%A6%82%E6%9E%9C%E4%BD%BF%E7%94%A8mvc%3Aannotation-driven%E5%88%99%E4%B8%8D%E7%94%A8%E9%85%8D%E7%BD%AE%E4%B8%8A%E9%9D%A2%E7%9A%84RequestMappingHandlerMapping%E5%92%8CRequestMappingHandlerAdapter%0A%20%20%20%20%20%E5%AE%9E%E9%99%85%E5%BC%80%E5%8F%91%E6%97%B6%E4%BD%BF%E7%94%A8mvc%3Aannotation-driven%0A%20%20%20%20%20%2D%2D%3E-->   </code>

Development annotation Handler

Use the annotator and annotation adapter. (The annotator and annotation adapter must be paired)

// Use @ Controller to identify it as a Controller @ Controllerpublic class ItemsController3 {// product query list @ RequestMapping ("/queryItems") // ing the queryItems method and url, A method corresponds to a url // It is generally recommended to write the url and method as public ModelAndView queryItems () throws Exception {// call the service to find the database and query the product List. Here, the static data is used to simulate the List.
  
   
ItemsList = new ArrayList
   
    
(); // Fill the static data in the list with Items items_1 = new Items (); items_1.setName ("Lenovo notebook"); items_1.setPrice (6000f ); items_1.setDetail ("ThinkPad T430 c3 Lenovo laptop! "); Items items_2 = new Items (); items_2.setName (" Apple phone "); items_2.setPrice (5000f); items_2.setDetail (" iPhone 6 Apple phone! "); ItemsList. add (items_1); itemsList. add (items_2); // return ModelAndView modelAndView = new ModelAndView (); // It is equivalent to the setAttribute method of the request. You can use itemsList to retrieve data modelAndView on the jsp page. addObject ("itemsList", itemsList); // specify the modelAndView. setViewName ("/WEB-INF/jsp/items/itemsList. jsp "); return modelAndView ;}}
   
  

Load Handler in spring container

<code class="language-xml hljs "><!--{cke_protected}{C}%3C!%2D%2D%20%E5%AF%B9%E4%BA%8E%E6%B3%A8%E8%A7%A3%E7%9A%84Handler%20%E5%8F%AF%E4%BB%A5%E5%8D%95%E4%B8%AA%E9%85%8D%E7%BD%AE%0A%20%20%20%20%E5%AE%9E%E9%99%85%E5%BC%80%E5%8F%91%E4%B8%AD%E5%8A%A0%E4%BD%A0%E4%BD%BF%E7%94%A8%E7%BB%84%E4%BB%B6%E6%89%AB%E6%8F%8F%0A%20%20%20%20%2D%2D%3E-->    <!--{cke_protected}{C}%3C!%2D%2D%20%20%3Cbean%20%20class%3D%22com.iot.ssm.controller.ItemsController3%22%2F%3E%20%2D%2D%3E-->    <!--{cke_protected}{C}%3C!%2D%2D%20%E5%8F%AF%E4%BB%A5%E6%89%AB%E6%8F%8Fcontroller%E3%80%81service%E3%80%81...%0A%20%20%20%20%E8%BF%99%E9%87%8C%E8%AE%A9%E6%89%AB%E6%8F%8Fcontroller%EF%BC%8C%E6%8C%87%E5%AE%9Acontroller%E7%9A%84%E5%8C%85%0A%20%20%20%20%20%2D%2D%3E-->    <context:component-scan base-package="com.iot.ssm.controller"></context:component-scan></code>