<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="//www.springframework.org/schema/beans"
       xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="//www.springframework.org/schema/beans
        //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="//xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="//xmlns.jcp.org/xml/ns/javaee //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="//www.springframework.org/schema/beans"
       xmlns:xsi="//www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="//www.springframework.org/schema/mvc"
       xmlns:context="//www.springframework.org/schema/context"
       xsi:schemaLocation="
        //www.springframework.org/schema/beans
        //www.springframework.org/schema/beans/spring-beans.xsd
        //www.springframework.org/schema/context
        //www.springframework.org/schema/context/spring-context.xsd
        //www.springframework.org/schema/mvc
        //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
    }

}