SpringMVC

的控制中心DispatcherServletSpringMVC

的核心三要素处理器映射器、处理器适配器、视图解析器SpringMVC

Spring

扮演的角色一致作用执行相关的请求处理逻辑并返回相应的数据和视图信息将其封装至

ModelAndView

对象中HandlerExecutionChain执行链包含了处理器

处理器适配器作用按照特定规则去执行

dependencygroupIdjavax.servlet/groupIdartifactIdjavax.servlet-api/artifactIdversion3.1.0/version

/dependency!--

dependencygroupIdjavax.servlet.jsp/groupIdartifactIdjsp-api/artifactIdversion2.1/version

/dependency!--

dependencygroupIdjavax.servlet/groupIdartifactIdjstl/artifactIdversion1.2/version

/dependency!--

dependencygroupIdtaglibs/groupIdartifactIdstandard/artifactIdversion1.1.2/version

/dependency!--

dependencygroupIdorg.springframework/groupIdartifactIdspring-webmvc/artifactIdversion5.3.18/version

/dependency!--

dependencygroupIdjunit/groupIdartifactIdjunit/artifactIdversion4.12/version

Maven

xmlnshttp://xmlns.jcp.org/xml/ns/javaeexmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://xmlns.jcp.org/xml/ns/javaee

http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsdversion4.0!--

DispatcherServlet

--servletservlet-namespringmvc/servlet-nameservlet-classorg.springframework.web.servlet.DispatcherServlet/servlet-class!--

DispatcherServlet

--init-paramparam-namecontextConfigLocation/param-nameparam-valueclasspath:spring-mvc.xml/param-value/init-param!--

启动级别1和服务器一起启动

--load-on-startup1/load-on-startup/servletservlet-mappingservlet-namespringmvc/servlet-nameurl-pattern//url-pattern/servlet-mapping/web-app编写

spring-mvc.xml

xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd!--

处理器映射器

classorg.springframework.web.servlet.handler.BeanNameUrlHandlerMapping/!--

处理器适配器

classorg.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter/!--

视图解析器

classorg.springframework.web.servlet.view.InternalResourceViewResolver!--

--property

classcom.Sun3285.controller.ControllerDemo01//beans编写一个

Controller处理器

容器进行管理RequestMapping(“请求路径”)完成映射关系根据请求路径找到对应的处理器Controller

控制器

xmlnshttp://xmlns.jcp.org/xml/ns/javaeexmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://xmlns.jcp.org/xml/ns/javaee

http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsdversion4.0!--

DispatcherServlet

--servletservlet-namespringmvc/servlet-nameservlet-classorg.springframework.web.servlet.DispatcherServlet/servlet-class!--

DispatcherServlet

--init-paramparam-namecontextConfigLocation/param-nameparam-valueclasspath:spring-mvc.xml/param-value/init-param!--

启动级别1和服务器一起启动

--load-on-startup1/load-on-startup/servletservlet-mappingservlet-namespringmvc/servlet-nameurl-pattern//url-pattern/servlet-mapping

?xml

xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexmlns:contexthttp://www.springframework.org/schema/contextxmlns:mvchttp://www.springframework.org/schema/mvcxsi:schemaLocationhttp://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttps://www.springframework.org/schema/mvc/spring-mvc.xsd!--

IOC

base-packagecom.Sun3285.controller/!--

SpringMVC

--mvc:default-servlet-handler/!--

支持注解驱动

classorg.springframework.web.servlet.view.InternalResourceViewResolver!--

--property

attributeValue)以键值对的形式赋值setViewName(String

viewName)参数

配置文件中通常我们只需要手动配置视图解析器而处理器映射器和处理器适配器只需要开启注解驱动即可省去了

xml

注解声明可以完成映射关系根据请求路径找到对应的处理器Controller

Model

官方文档https://docs.spring.io/spring-framework/docs/current/reference/html/web.html。