LuceneIndexer

最新推荐文章于 2021-01-30 19:03:16 发布

转载最新推荐文章于 2021-01-30 19:03:16 发布 · 323 阅读

本文介绍了如何使用Lucene库创建索引，并通过创建Person对象来实现数据的索引存储。

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package com.fmr.search;

import java.io.File;
import java.io.IOException;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;

public class LuceneIndexer {
   private static final Object MUTEX = new Object();

   public static void main(String[] args) throws Exception {
       LuceneIndexer luceneIndexer = new LuceneIndexer();
       Person person = new Person();
       person.setId("001");
       person.setName("Tom");
       person.setDescription("Tom lives in Boston");
       luceneIndexer.create(person);
       person = new Person();
       person.setId("002");
       person.setName("Tom");
       person.setDescription("Tom lives in Boston");
       luceneIndexer.create(person);
   }
   public void create(Person person) throws IOException {
       synchronized (MUTEX) {
           IndexWriter indexWriter = null;
           Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_36);
           IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_36,
                   analyzer)
                   .setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND);
           FSDirectory fsDir = FSDirectory.open(new File("LuceneIndex"));
           indexWriter = new IndexWriter(fsDir, conf);
           Document document = createDocument(person);
           indexWriter.addDocument(document);
//           if (indexWriter.maxDoc() % 100 == 0){
//               indexWriter.forceMergeDeletes();
//           }
           indexWriter.commit();
           indexWriter.close();
       }
   }

   private Document createDocument(Person person) {
       Document doc = new Document();
       doc.add(new Field("person.id", String.valueOf(person.getId()),
               Field.Store.YES, Field.Index.NOT_ANALYZED));
       doc.add(new Field("person.name", String.valueOf(person.getName()),
               Field.Store.YES, Field.Index.NOT_ANALYZED));
       doc.add(new Field("person.description", String.valueOf(person
               .getDescription()), Field.Store.NO, Field.Index.ANALYZED));

       return doc;
   }
}