The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path [duplicate]
Include servlet-api-3.1.jar in your dependencies.
Maven
<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope></dependency>Gradle
configurations { provided}sourceSets { main { compileClasspath += configurations.provided }}dependencies { provided 'javax.servlet:javax.servlet-api:3.1.0'}