启动spring boot项目时报错：java.lang.ClassNotFoundException: javax.servlet.Filter

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <!--<scope>provided</scope>-->
        </dependency>

在pom文件中将scope注释
再加上

<dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>

原文：https://www.cnblogs.com/qianzf/p/13602935.html