（要啥复制啥）

    1. 创建Maven工程

    2. 依赖：

      1. <dependencies>
      2.      <!-- SpringMVC -->
      3.      <dependency>
      4.          <groupId>org.springframework</groupId>
      5.          <artifactId>spring-webmvc</artifactId>
      6.          <version>5.3.1</version>
      7.      </dependency>
      9.      <!-- 日志 -->
      10.      <dependency>
      11.          <groupId>ch.qos.logback</groupId>
      12.          <artifactId>logback-classic</artifactId>
      13.          <version>1.2.3</version>
      14.      </dependency>
      16.      <!-- ServletAPI -->
      17.      <dependency>
      18.          <groupId>javax.servlet</groupId>
      19.          <artifactId>javax.servlet-api</artifactId>
      20.          <version>3.1.0</version>
      21.          <scope>provided</scope>   <!-- provided -->
      22.      </dependency>
      24.      <!-- Spring5和Thymeleaf整合包 -->
      25.      <dependency>
      26.          <groupId>org.thymeleaf</groupId>
      27.          <artifactId>thymeleaf-spring5</artifactId>
      28.          <version>3.0.12.RELEASE</version>
      29.      </dependency>
      31.        <!--@ResponseBody处理json所需要的依赖-->
      32.      <dependency>
      33.          <groupId>com.fasterxml.jackson.core</groupId>
      34.          <artifactId>jackson-databind</artifactId>
      35.          <version>2.12.1</version>
      36.      </dependency>
      38.      <!--文件上传-->
      39.      <dependency>
      40.          <groupId>commons-fileupload</groupId>
      41.          <artifactId>commons-fileupload</artifactId>
      42.          <version>1.3.1</version>
      43.      </dependency>
      45.  </dependencies>

    3. war，创建 webapp 包，创建web.xml文件

    image.png

    1. web.xml ```xml <?xml version=”1.0” encoding=”UTF-8”?>

      1.  <filter-name>CharacterEncodingFilter</filter-name>
      2.  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      3.  <init-param>
      4.      <param-name>encoding</param-name>
      5.      <param-value>UTF-8</param-value>
      6.  </init-param>
      7.  <init-param>
      8.      <param-name>forceResponseEncoding</param-name>
      9.      <param-value>true</param-value>
      10.  </init-param>

      1.  <filter-name>CharacterEncodingFilter</filter-name>
      2.  <url-pattern>/*</url-pattern>

      1.  <filter-name>HiddenHttpMethodFilter</filter-name>
      2.  <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>

      1.  <filter-name>HiddenHttpMethodFilter</filter-name>
      2.  <url-pattern>/*</url-pattern>

      1.  <servlet-name>DispatcherServlet</servlet-name>
      2.  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      3.  <init-param>
      4.      <param-name>contextConfigLocation</param-name>
      5.      <param-value>classpath:springMVC.xml</param-value>
      6.  </init-param>
      7.  <load-on-startup>1</load-on-startup>

      1.  <servlet-name>DispatcherServlet</servlet-name>
      2.  <url-pattern>/</url-pattern>

    1. 5.springMVC.xml
    2. ```xml
    3. <?xml version="1.0" encoding="UTF-8"?>
    4. <beans xmlns="http://www.springframework.org/schema/beans"
    5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    6.        xmlns:context="http://www.springframework.org/schema/context"
    7.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    9.     <!--注解扫描-->
    10.     <context:component-scan base-package="com.wexiao.restful.controller"></context:component-scan>
    12.     <!--配置 thymeleaf 的视图解析器-->
    13.     <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
    14.         <property name="order" value="1"/>
    15.         <property name="characterEncoding" value="UTF-8"/>
    16.         <property name="templateEngine">
    17.             <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
    18.                 <property name="templateResolver">
    19.                     <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
    21.                         <!-- 视图前缀 -->
    22.                         <property name="prefix" value="/WEB-INF/templates/"/>
    24.                         <!-- 视图后缀 -->
    25.                         <property name="suffix" value=".html"/>
    26.                         <property name="templateMode" value="HTML5"/>
    27.                         <property name="characterEncoding" value="UTF-8" />
    28.                     </bean>
    29.                 </property>
    30.             </bean>
    31.         </property>
    32.     </bean>
    35.       <!--配置视图控制器：当控制器方法中，仅仅用来实现页面跳转-->
    36.     <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
    38.     <!--
    39.        处理静态资源，例如html、js、css、jpg
    40.       若只设置该标签，则只能访问静态资源，其他请求则无法访问
    41.       此时必须设置<mvc:annotation-driven/>解决问题
    42.      -->
    43.     <mvc:default-servlet-handler/>
    45.     <!-- 开启mvc注解驱动 -->
    46.     <mvc:annotation-driven>
    47.         <mvc:message-converters>
    48.             <!-- 处理响应中文内容乱码 -->
    49.             <bean class="org.springframework.http.converter.StringHttpMessageConverter">
    50.                 <property name="defaultCharset" value="UTF-8" />
    51.                 <property name="supportedMediaTypes">
    52.                     <list>
    53.                         <value>text/html</value>
    54.                         <value>application/json</value>
    55.                     </list>
    56.                 </property>
    57.             </bean>
    58.         </mvc:message-converters>
    59.     </mvc:annotation-driven>
    61.        <!--配置文件上传解析器，将上传的文件封装为 MultipartFile对象-->
    62.     <!--必须通过文件解析器的解析才能将文件转换为MultipartFile对象-->
    63.     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>
    65.   <!--配置拦截器-->
    66.   <!--<mvc:interceptors>
    67.     <bean class="com.atguigu.interceptor.FirstInterceptor"></bean>    //FirstInterceptor拦截器类名 (implements HandlerInterceptor)
    68.     <ref bean="firstInterceptor"></ref>  //需要在FirstInterceptor类上标识普通组件Component(value="firstInterceptor")
    69.      </mvc:interceptors>-->
    70.   <!-- 以上两种配置方式都是对DispatcherServlet所处理的所有的请求进行拦截 -->
    71.   <mvc:interceptors>
    72.       <mvc:interceptor>
    73.       <!--<mvc:mapping path="/*"/>    <!--/a  /b 一层目录--> -->
    74.       <mvc:mapping path="/**"/>        <!--拦截所有-->
    75.       <mvc:exclude-mapping path="/"/>
    76.       <ref bean="firstInterceptor"></ref>
    77.     </mvc:interceptor>
    78.   </mvc:interceptors>
    79.   <!-- 
    80.  以上配置方式可以通过ref或bean标签设置拦截器，通过mvc:mapping设置需要拦截的请求，通过mvc:exclude-mapping设置需要排除的请求，即不需要拦截的请求
    81.     -->
    84.   <!-- 配置异常处理 -->
    85.   <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    86.     <property name="exceptionMappings">
    87.         <props>
    88.             <!--
    89.                 properties的键表示处理器方法执行过程中出现的异常
    90.                 properties的值表示若出现指定异常时，设置一个新的视图名称，跳转到指定页面
    91.                         error:视图名称
    92.             -->
    93.             <prop key="java.lang.ArithmeticException">error</prop>
    94.         </props>
    95.     </property>
    96.     <!--
    97.         exceptionAttribute属性设置一个属性名，将出现的异常信息在请求域中进行共享，并设置在共享请求域中的键
    98.     -->
    99.     <property name="exceptionAttribute" value="exception"></property>
    100.     <!--在html页面中， <p th:text="${exception}"></p> -->
    101.     <!--show:java.lang.ArithmeticException -->
    102.     </bean>        
    104. </beans>