springmvc two configuration methods

Xml-based configuration file mode,

Configuration springmvc steps:

1.在pom文件中引入jar包：   
 <!--导入springmvc的jar包-->
  <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
    <version>4.3.1.RELEASE</version>
  </dependency>
2. 在web.xml文件中添加servlet

 <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--配置springmvc.xml的路径-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
3. 创建Handler接口实现类，

        import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.mvc.Controller;
    
    /**
     * Created by Intellij IDEA.
     * User:  陈亚萌
     * Date:  2019/9/3
     */
    public class MyHandler implements Controller {
        @Override
        public ModelAndView handleRequest(javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse) throws Exception {
            //装在模型数据和逻辑视图
            ModelAndView modelAndView=new ModelAndView();
            //添加模型数据
            modelAndView.addObject("name","tom");
            //添加逻辑视图
            modelAndView.setViewName("show");
            return modelAndView;
        }
    }

3. 在resources中创建springmvc.xml文件，关联起来
            <?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">
        <!--配置HandlerMapping，将url请求映射到Handler-->
        <bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
            <!--配置mapping-->
            <property name="mappings">
                <props>
                    <!--配置test请求对应的handler-->
                    <prop key="/test">testHandler</prop>
                </props>
            </property>
        </bean>
        <!--配置-->
        <bean id="testHandler" class="MyHandler"></bean>
        <!--配置视图解析器-->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!--配置前缀-->
            <property name="prefix" value="/"></property>
            <!--配置后缀-->
            <property name="suffix" value=".jsp"></property>
        </bean>
    </beans>

---

Annotation-based realization springmvc

1. Ditto
2. Ditto

3. springmvc configuration

    <?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:context="http://www.springframework.org/schema/context"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!--将annotationHandler自动扫描到ioc容器-->
        <context:component-scan base-package="com.imooc.handler"></context:component-scan>
        <!--配置视图解析器-->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!--配置前缀-->
            <property name="prefix" value="/"></property>
            <!--配置后缀-->
            <property name="suffix" value=".jsp"></property>
        </bean>
    </beans>

4. Create a controller, and Annotate

        package com.imooc.handler;
   
        import org.springframework.stereotype.Controller;
        import org.springframework.ui.Model;
        import org.springframework.web.bind.annotation.RequestMapping;
        import org.springframework.web.servlet.ModelAndView;
   
        import javax.jws.WebParam;
        import java.util.Map;
   
        /**
         * Created by Intellij IDEA.
         * User:  陈亚萌
         * Date:  2019/9/3
         */
        @Controller
        public class AnnotationHandler {
   
            /**
             * 业务方法：ModelAndView完成数据的传递和视图的解析
             */
            @RequestMapping("/model")
            public ModelAndView modelAndViewTest(){
                //创建ModelAndView对象
                ModelAndView modelAndView=new ModelAndView();
                //填充数据
                modelAndView.addObject("name","cym");
                //设置逻辑视图
                modelAndView.setViewName("show");
                return modelAndView;
            }
   
            /*
            * 业务方法：使用Model传值，String进行视图解析
            * */
            @RequestMapping("modelAndTest")
            public String modelTest(Model model){
                //填充模型数据
                model.addAttribute("name","yyh");
                //设置逻辑视图
                return "show";
            }
            /*
            * 业务方法：Map传值：String，进行视图解析
            * */
            @RequestMapping("map")
            public String MapTest(Map<String,String> map){
                //设置模型数据
                map.put("name","cymhhh");
                //设置逻辑视图
                return "show";
   
            }
   
        }

---

     <!--处理中文乱码-->
      <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>
      <!--设置访问静态资源-->
      <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.css</url-pattern>
      </servlet-mapping>

I remember in the allocation of what plus / , where without

    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>