This clip demonstrates how to upload data from CSV files, into your opensolr index, in just a few easy steps.

Notes:

If your csv file doesn't have a unique ID field, you have to add this updateRequestProcessorChain inside your solrconfig.xml file, in order to auto-populate your solr unique ID field, with a unique random value:

<updateRequestProcessorChain>
	<processor class="solr.UUIDUpdateProcessorFactory">
		<str name="fieldName">id</str>
	</processor>
	<processor class="solr.LogUpdateProcessorFactory" />
	<processor class="solr.RunUpdateProcessorFactory" />
</updateRequestProcessorChain>

You will have to add the snippet above, right below one of the </searchComponent> tags in your solrconfig.xml file