1.4.2、pom.xml 中添加依赖

在创建好 web 项目后，加入 Servlet 依赖，SpringMVC 依赖

servlet** 与 SpringMVC **依赖:

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- SpringMVC -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.3.1</version>
    </dependency>
    <!-- 日志 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.2.3</version>
    </dependency>
    <!-- ServletAPI -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope> </dependency>
    <!-- Spring5和Thymeleaf整合包 -->
    <dependency>
      <groupId>org.thymeleaf</groupId>
      <artifactId>thymeleaf-spring5</artifactId>
      <version>3.0.12.RELEASE</version>
    </dependency>
  </dependencies>

注：由于 Maven 的传递性，我们不必将所有需要的包全部配置依赖，而是配置最顶端的依赖，其他靠传递性导入。

插件:

<build>
  <plugins>
<!-- 编码和编译和JDK版本 -->
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>3.8.0</version>
      <configuration>
        <source>16</source>
        <target>16</target>
      </configuration>
    </plugin>
  </plugins>
</build>