Solr 检索数据

001, +148022337, new York, John 
002, +148022338, Hawaii, Emma 
003, +148022339, Florida, Sophia

[Hadoop@localhost bin]$ ./post-c Solr_sample.csv

import java.io.IOException;  
import org.apache.Solr.client.Solrj.SolrClient; 
import org.apache.Solr.client.Solrj.SolrQuery; 
import org.apache.Solr.client.Solrj.SolrServerException; 
import org.apache.Solr.client.Solrj.impl.HttpSolrClient; 
import org.apache.Solr.client.Solrj.response.QueryResponse; 
import org.apache.Solr.common.SolrDocumentList;  
public class RetrievingData { 
   public static void main(String args[]) throws SolrServerException, IOException  { 
      //Preparing the Solr client 
      String urlString = "http://localhost:8983/Solr/my_core"; 
      SolrClient Solr = new HttpSolrClient.Builder(urlString).build();  
      
      //Preparing the Solr query 
      SolrQuery query = new SolrQuery();  
      query.setQuery("*:*");  
   
      //Adding the field that has to be retrieved 
      query.addField("*");  
   
      //Executing query for data 
      QueryResponse queryResponse = Solr.query(query);  
   
      //Saving the results of the query 
      SolrDocumentList docs = queryResponse.getResults();    
      System.out.println(docs); 
      System.out.println(docs.get(0)); 
      System.out.println(docs.get(1)); 
      System.out.println(docs.get(2));   
         
      //storing the operations 
      Solr.commit();         
   } 
}

[Hadoop@localhost bin]$ javac RetrievingData 
[Hadoop@localhost bin]$ java RetrievingData

{numFound = 3, start = 0, docs = [SolrDocument{id=001, phone = [+148022337], 
city = [California], first_name = [Olivia],
_version_ = 1547262806014820352}, SolrDocument { id = 002, phone = [+148022338], 
city = [Hawaii], first_name = [Emma],
_version_ = 1547262806026354688}, SolrDocument { id = 003, phone = [+148022339], 
city = [Florida], first_name = [Sophia],
_version_ = 1547262806029500416}]} SolrDocument {id = 004, phone = [+148022337], city = [Texas], first_name = [Emily], 
_version_ = 1547262806014820352}, SolrDocument { id = 002, phone = [+148022338], 
city = [Hawaii], first_name = [Emma],
_version_ = 1547262806026354688}, SolrDocument { id = 003, phone = [+148022339], 
city = [Florida], first_name = [Sophia],
_version_ = 1547262806029500416}