Processor Mapper and adapter for annotations

1. Configure the note Mapper and adapter.

<!--annotation mapper -- < Bean class="Org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" /> <!--Note Adapter -- < Bean class="Org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" />

However, in the actual development, the annotations of the adapter and mapper configuration is often used to note-driven:

Using Mvc:annotation-driven instead of the top annotation mapper and annotation adapter configuration
Mvc:annotation-driven loads a number of parameter binding methods by default,
For example, the JSON conversion parser is loaded by default, if you use Mvc:annotation-driven do not configure the upper requestmappinghandlermapping and Requestmappinghandleradapter
Use Mvc:annotation-driven during actual development

2, Development Note handler

Adapters that use the callout's mapper and annotations (the annotated mapper and annotations must be paired with the adapter).

 PackageCn.itcast.ssm.controller;ImportJava.util.ArrayList;ImportJava.util.List;ImportOrg.springframework.stereotype.Controller;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.servlet.ModelAndView;ImportCn.itcast.ssm.po.Items;/** * @author Administrator * */@Controller Public classItemsController3 {//Commodity query list//@RequestMapping Implement mapping of Queryitems methods and URLs, one method corresponds to a URL//General recommendation to write URLs and methods as@RequestMapping ("/queryitems") PublicModelandview Queryitems ()throwsexception{//Call service to find database, query commodity list, use static data simulation hereList<items> itemslist =NewArraylist<items> ();//Populating the list with static dataItems Items_1 =NewItems (); Items_1.setname ("Lenovo Notebook"); Items_1.setprice (6000f); Items_1.setdetail ("ThinkPad T430 Lenovo notebook computer! "); Items items_2 =NewItems (); Items_2.setname ("Apple Phone"); Items_2.setprice (5000f); Items_2.setdetail ("iphone6 Apple Phone! "); Itemslist.add (items_1); Itemslist.add (items_2);//Return to ModelandviewModelandview Modelandview =NewModelandview ();//equivalent to request setattribut, fetching data through Itemslist in JSP pagesModelandview.addobject ("itemslist", itemslist);//Specify View///Bottom path, if you configure the prefix of the JSP path in the view parser and the suffix of the JSP path, modify to//modelandview.setviewname ("/web-inf/jsp/items/itemslist.jsp");//upper path configuration can not specify JSP path prefix and JSP path suffix in the programModelandview.setviewname ("/web-inf/jsp/items/itemslist.jsp");returnModelandview;}}

3, load handler in spring container

For annotations, the handler can be configured individually, and it is recommended to use component scanning for automatic scanning in real development.

<bean class= "Cn.itcast.ssm.controller.ItemsController3"/>

<!--can scan controller, service 、...

Here, let's scan the controller, specify the controller's package.

-

< context:component-scanbase-package ="Cn.itcast.ssm.controller"  ></context:component-scan>

Processor Mapper and adapter for annotations