Apache Solr Server integration with Solr4j – Adding Documents with Multivalued Field

When we want to integrate Apache Solr Server within Java Application, we need to use Solr4j Api.

For Adding the Solr Documents programmatically,

We will code step by step -

Adding the Solr Server in Code -

public static String url = "http://localhost:8983/solr";
...

CommonsHttpSolrServer server = new CommonsHttpSolrServer(url); 
		
...

Adding Single Document to Solr Server -

   SolrInputDocument doc = new SolrInputDocument();
   doc.addField("id","ID Field Value");
   doc.addField("subject","Subject Field Value");
   server.add( doc); 			   
   server.commit();

Adding Documents to Solr Server and commit after 100 Documents add

public static Collection docs = new ArrayList();

....

We can write within loop while increasing counter //pseudo code is here
   {
       SolrInputDocument doc = new SolrInputDocument();
       doc.addField("id","ID Field Value");
       doc.addField("subject","Subject Field Value");
       docs.add(doc);
   }

now commit after some more document adding -

 if((counter%100)==0)
   {
       server.add( doc); 			   
       server.commit();
   }

How to add a mutivalued field

Code is

    List categories = new ArrayList();
    String[] categoriesArray = arrStr[1].split(",");
    for(int l = 0; l < categoriesArray.length;l++)
    {
       categories.add(categoriesArray[l]);
   }
			   
   doc.addField("categories", categories ); // Here categories is a multivalued field