Example code for using solr in java

SolrJ is the Java client that operates on Solr. It provides the JAVA interface for adding, modifying, deleting, and querying the Solr index. SolrJ encapsulates Rest's HTTP interface for Solr, and the bottom layer of SolrJ USES the methods in httpClient to complete the operation of Solr.

References to jar packages (maven ES17en.xml) :

 <dependency>
      <groupId>org.apache.solr</groupId>
      <artifactId>solr-solrj</artifactId>
      <version>5.3.1</version>
</dependency>
<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
</dependency>
<dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.7</version>
</dependency>
<dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.3</version>
</dependency>

java code:

package entity;

import java.io.IOException;
import java.util.List;

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.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.SolrInputDocument;


public class SolrJTest {
   // The specified solr Server address  
   private final static String SOLR_URL = "http://localhost:8080/solr/"; 

   /**
   *  create SolrServer object 
   * 
   *  This object can be used in two ways, both of which are thread safe  
   * 1 , CommonsHttpSolrServer : starting web Server used by, via http The request of  
   * 2 ,  EmbeddedSolrServer : Inline, import solr the jar The package is ready to use  
   * 3 , solr 4.0 And then I kind of added a bunch of things, one of them CommonsHttpSolrServer This class is renamed to HttpSolrClient
   * 
   * @return
   */
   public HttpSolrClient createSolrServer(){
     HttpSolrClient solr = null;
     solr = new HttpSolrClient(SOLR_URL);
     return solr;
   }


   /**
   *  Add a document to the index library 
   * @throws IOException 
   * @throws SolrServerException 
   */
   public void addDoc() throws SolrServerException, IOException{
    // structure 1 document  
     SolrInputDocument document = new SolrInputDocument(); 
     // to doc Add field in , Fields added on the client side must be defined on the server side  
     document.addField("id", "8"); 
     document.addField("name", " Zhou Xinxing "); 
     document.addField("description", "1 A brilliant military strategist "); 
     // To obtain 1 a solr Server side request, to submit  , Choose something specific 1 a solr core
    HttpSolrClient solr = new HttpSolrClient(SOLR_URL + "my_core");
    solr.add(document);
    solr.commit();
    solr.close();
   }


   /** 
   *  According to the id Delete a document from the index library  
   */
   public void deleteDocumentById() throws Exception { 
     // Choose something specific 1 a solr core
     HttpSolrClient server = new HttpSolrClient(SOLR_URL+"my_core"); 
     // Delete the document  
     server.deleteById("8"); 
     // Delete all indexes 
     //solr.deleteByQuery("*:*");
     // Commit changes  
     server.commit(); 
     server.close();
   } 

   /**
   *  The query 
   * @throws Exception 
   */
   public void querySolr() throws Exception{
     HttpSolrClient solrServer = new HttpSolrClient(SOLR_URL+"my_core/"); 
     SolrQuery query = new SolrQuery(); 
     // The following Settings solr Query parameters 
     //query.set("q", "*:*");//  parameter q  Query all   
     query.set("q"," Stephen chow ");// Related query, such as a certain data a certain field contains week, star, chi 3 A word   It's going to query it   , this function applies to associative query 

     // parameter fq,  to query Added filter query criteria  
     query.addFilterQuery("id:[0 TO 9]");//id for 0-4 

     // to query Increase the Boolean filter condition  
     //query.addFilterQuery("description: actor "); //description Data containing the word "actor" in the field 

     // parameter df, to query Set the default search domain  
     query.set("df", "name"); 

     // parameter sort, Sets the collation that returns the result  
     query.setSort("id",SolrQuery.ORDER.desc);

     // Set paging parameters  
     query.setStart(0); 
     query.setRows(10);// every 1 How much value on page  

     // parameter hl, Set the highlight  
     query.setHighlight(true); 
     // Set the highlighted fields  
     query.addHighlightField("name"); 
     // Set the highlighted style  
     query.setHighlightSimplePre("<font color='red'>"); 
     query.setHighlightSimplePost("</font>"); 

     // Get query results 
     QueryResponse response = solrServer.query(query); 
     // Two results are obtained: a document collection or an entity object 

     // The query results in a collection of documents  
     SolrDocumentList solrDocumentList = response.getResults(); 
     System.out.println(" Get the results of the query through a collection of documents "); 
     System.out.println(" Total number of query results: " + solrDocumentList.getNumFound()); 
     // Traverse the list  
     for (SolrDocument doc : solrDocumentList) {
       System.out.println("id:"+doc.get("id")+"  name:"+doc.get("name")+"  description:"+doc.get("description"));
     } 

     // Get the entity object 
     List<Person> tmpLists = response.getBeans(Person.class);
     if(tmpLists!=null && tmpLists.size()>0){
       System.out.println(" Get the results of the query through a collection of documents "); 
       for(Person per:tmpLists){
         System.out.println("id:"+per.getId()+"  name:"+per.getName()+"  description:"+per.getDescription());
       }
     }
   }

   public static void main(String[] args) throws Exception {
     SolrJTest solr = new SolrJTest();
     //solr.createSolrServer();
     solr.addDoc();
     solr.deleteDocumentById();
     solr.querySolr();
  }
}

Reference: http: / / www doc88. com/p - 6763747939865. html