Hi,

This error is coming because you don't have the Apache httpcomponents in your project.

You can download the jar file and add into your project.

If you are using maven then its much easier. Add the following dependency for getting apachehttpcomponents in your project:

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.3</version>
</dependency>

Thanks