<servlet>

        <servlet-name>springmvc</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<!--        关联一个springmvc配置文件  xxx-servlet.xml-->

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:springmvc-servlet.xml</param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

<!--    /匹配所有的请求  不包括.jsp-->

<!--    /*匹配所有的请求  包括.jsp-->

    <servlet-mapping>

        <servlet-name>springmvc</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans.xsd">

<!--    匹配url去处理-->

    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceView">

<!--        前缀-->

        <property name="prefix" value="/WEB-INF/jsp/"/>

<!--        后缀-->

        <property name="suffix" value=".jsp"/>

<!--        所以到时我们转发的时候只需给核心名字就行,避免写路径-->

    </bean>

    <bean id="/hello" class="com.ljm.controller.HelloController"/>

</beans>

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.Controller;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class HelloController implements Controller {

    @Override

    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {

        ModelAndView mv = new ModelAndView();

        mv.addObject("msg","HelloSpringMVC");

        mv.setViewName("hello");  //WEB-INF/jsp/hello.jsp

        return mv;

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"

         version="4.0">

    <servlet>

        <servlet-name>springmvc</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!--        关联一个springmvc配置文件  xxx-servlet.xml-->

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:springmvc-servlet.xml</param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <!--    /匹配所有的请求  不包括.jsp-->

    <!--    /*匹配所有的请求  包括.jsp-->

    <servlet-mapping>

        <servlet-name>springmvc</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

</web-app>

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xmlns:mvc="http://www.springframework.org/schema/mvc"

       xmlns:context="http://www.springframework.org/schema/context"

       xsi:schemaLocation="

        http://www.springframework.org/schema/beans

        https://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context

        https://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/mvc

        https://www.springframework.org/schema/mvc/spring-mvc.xsd

">

<!--    自动扫描包,指定包下的注解生效,由IOC容器统一管理-->

    <context:component-scan base-package="com.ljm.controller"/>

<!--    让SpringMVC不处理静态资源  css,js,html,mp3 4-->

    <mvc:default-servlet-handler/>

<!--    自动完成之前bean的两个实例注入-->

    <mvc:annotation-driven/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceView">

<!--        前缀-->

        <property name="prefix" value="/WEB-INF/jsp/"/>

<!--        后缀-->

        <property name="suffix" value=".jsp"/>

<!--        所以到时我们转发的时候只需给核心名字就行,避免写路径-->

    </bean>

</beans>

@Controller   //完成之前bean的注册作用

//@RequestMapping("/hello")

//@RequestMapping可以作用于类 也可以作用于方法  一般选后者  两者都有的话url地址要叠加

public class HelloController  {

    @RequestMapping("/hello")  //真实访问地址   项目名/*/hello

    public String hello666(Model model){

        //封装数据

        model.addAttribute("msg","hello anno");

        return "jojohello";  //会被视图解析器处理  jsp目录下的jsp文件

    }

}