jakarta.servlet.ServletException: 类 XXX.HelloServlet不是Servlet

最近在构建maven-web项目过程中发现一点问题：

调用servlet出现HTTP Status 500 错误

错误原因：

tomcat10之后，javax.servlet更名为jakarta.servlet，所以写成javax.servlet，tomcat就无法找到servlet依赖的类。

解决方法:

这里提供两种解决方法

方法1 更改maven配置pom.xml

将pom.xml中servlet的dependency改为

<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
      <groupId>jakarta.servlet</groupId>
      <artifactId>jakarta.servlet-api</artifactId>
      <version>5.0.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
    <dependency>
      <groupId>jakarta.servlet.jsp</groupId>
      <artifactId>jakarta.servlet.jsp-api</artifactId>
      <version>3.0.0</version>
      <scope>provided</scope>
    </dependency>
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方法2 更换tomcat

可以将部署服务器由tomcat10改为tomcat9

参考链接

1. https://blog.csdn.net/weixin_43866043/article/details/108627505
2. https://blog.csdn.net/wflsyf/article/details/112800735?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.control&dist_request_id=&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.control
3. https://blog.csdn.net/weixin_44322375/article/details/114560916?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_title-0&spm=1001.2101.3001.4242