Introduction to SPRINGMVC Controller annotations

Spring2.5 before we did that by implementing Control interface or implementation to define our processor class.

Spring2.5 Note Processor support was introduced, @controller and the @requestMapping annotations Define our classes and provide a powerful set of annotations:

Need to pass processor mapping

defaultannotationhandlermapping and Processor adapters Annotationmethodhandleradapter to turn on support @Controller and @RequestMapping the annotated processor.

@ Controller used to identify the processor class

@RequestMapping: Mapping rules for request-to-processor functional methods;

@RequestParam: Bind the request parameter to the method parameter of the processor function processing method;

@ModelAttribute: The binding of the request parameter to the command object;

Spring3.0

use of a new handlermapping and the Handleradapter Support @Controller and the @RequestMapping Annotation Processor

the new @Contoller and @requestmapping annotation support classes: Processor mapping requestmappinghandlermapping

and Processor Adapters requestmappinghandleradapter combination to replace Spring2.5 processor mapping defaultannotationhandlermapping and processor adapter Annotationmethodhandleradapte R

Let's take a look at the basic annotations below

The mapping of the processors is assigned to the following

1. URL Path mapping: Using URL mapping request to the processor's functional processing method;
2. Request Method Mapping Qualification: If the Limit function processing method only handles GET request;
3. Request Parameter Mapping Qualification: If the qualification only deals with " ABC "request parameter request;
4. Request Header Mapping Qualification: If the limit is only processed " Accept=application/json "Request

implementation of the controller 1 defining the processor @Controller

@Controller///① to declare a Pojo class as processor @requestmapping ("/examqueryquestion")///② request URL-to-processor feature-handling method mapping public Classqueryquestioncontroller {}

1.1 Narrowing request mapping @RequestMapping

http://192.168.24.9:8080/ Itoo-exam-questionbankmanage-web / examqueryquestion / toquestiontypesexcel

@Controller // / ① will a POJO class is declared as a processor

@RequestMapping ("/examqueryquestion") // /Generic Request prefix

Public class Queryquestioncontroller {

@RequestMapping ("/toquestiontypesexcel")

Public Stringtoquestiontypesexcel (HttpServletRequest request,

HttpServletResponse Resposne) {

return "/examqueryquestion";

}

}

can be passed in a POJO Place on class @Controller or @RequestMapping , you can put a POJO class becomes processor;

2Spring configuration file spring-mvc.xml

<!--Spring3.1 start annotations handlermapping-<bean  

3 Configuration of the view parser

or use the previous Org.springframework.web.servlet.view.InternalResourceViewResolver .

4 configuration of the processor

simply register the processor implementation class with the spring configuration file, spring defaultannotationhandlermapping or requestmappinghandlermapping @Controller or Span lang= "en-US" style= "FONT-SIZE:18PX; Font-family:calibri "> @RequestMapping auto discovery.

Summary:

This content is A small part of Spring, its content is a simple injection method, no longer have the configuration file, Of course, the pre-learning configuration file Method injection is also the same , the basic understanding is not much what, simple record two ways of learning.

Introduction to SPRINGMVC Controller annotations