<dependencies><!-- spring context --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.1.5.RELEASE</version></dependency><!-- spring web --><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>5.1.5.RELEASE</version></dependency><!-- web mvc 前端控制器 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.1.5.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>5.1.5.RELEASE</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>4.0.1</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2.1-b03</version></dependency></dependencies>
mvc 核心控制器配置
<!-- spring mvc 的前端控制器--><servlet><servlet-name>DispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--context上下文對象--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><load-on-startup>1</load-on-startup><!--服務器啟動時加載此對象--></servlet><servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>/</url-pattern><!--每次請求 都走此servlet--></servlet-mapping>