Hi,

This error comes in project when servlet jar file is not added to project.

If you are using maven then add following line in pom.xml file:

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
</dependency>

If you are not using maven in your project then find servlet.jar from Tomcat server and then add it to your project.

This should solve error.

Thanks

Hi

First you need to configure the server then follow the steps

1.Right click on Project-->Build Path-->Configure Build Path

2.go to libraries tab -->add Library-->server run time-->Select the server-->Finish

Now u can resolve the errors