SpringMVC___ simple configuration using xml and notes

It is a dynamic web project
a, xml configuration form
applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
    <!-- 注册对应的 处理器映射器 -->
     <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean> 
    <!-- 注册对应的 处理器适配器 -->
     <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
     
    <!-- 注册自定义的Controller,并加上路径:/hello,相当于注解的@RequestMapping("/hello") -->
     <bean class="com.controller.MyController" name="/hello"></bean>  
    </beans>

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>SpringDemo08</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
      <servlet-name>spring-mvc</servlet-name>
      <!-- 中央处理器or前端控制器 -->
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
        <param-name>contextConfigLocation</param-name>
        <!-- 配置文件 -->
        <param-value>classpath:applicationContext.xml</param-value>
       </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <!-- 映射路径 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
</web-app>

Controller when not in use annotations to implement an interface
org.springframework.web.servlet.mvc.Controller

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class MyController implements Controller{
    public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
        // TODO Auto-generated method stub
        System.out.println("----返回ModelAndView----");
        ModelAndView mav = new ModelAndView();
        mav.setViewName("/index.jsp");
        return mav;
    }
    
}

Second, the use of annotations
applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
    <!-- 开启扫描 -->
    <context:component-scan base-package="com.controller"/>
    <!-- 开启SpringMVC注解的方式 -->
    <mvc:annotation-driven/>
</beans>

Here Web.xml substantially no change

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>SpringDemo08</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
      <servlet-name>spring-mvc</servlet-name>
      <!-- 中央处理器or前端控制器 -->
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
        <param-name>contextConfigLocation</param-name>
        <!-- 配置文件 -->
        <param-value>classpath:applicationContext.xml</param-value>
       </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring-mvc</servlet-name>
    <!-- 映射路径 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
</web-app>

There is no need to achieve Controller Controller interface, just add annotations can give it to spring container management

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
/*@RequestMapping("/con") //这里也可以配置访问这整一个Controller路径*/
public class MyController{
    
    @RequestMapping("/sel")
    public ModelAndView selIndex() {
        // TODO Auto-generated method stub
        System.out.println("----返回ModelAndView----");
        ModelAndView mav = new ModelAndView();
        mav.setViewName("/index.jsp");
        return mav;
    }
}