Spring mvc使用mybatis如何实现连接并操作mysql数据库

<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:/context.xml</param-value></context-param><!-- 监听器：启动服务器时，启动 spring --><listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- spring 核心控制器 --><servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup><init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:external-servlet.xml</param-value></init-param></servlet><servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern></servlet-mapping><!-- 编码过滤器 --><filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value></init-param><init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value></init-param></filter><filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern></filter-mapping>