net.skyatlas.icd.test.RAMDirectoryDemo.java Source code

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Here is the source code for net.skyatlas.icd.test.RAMDirectoryDemo.java

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package net.skyatlas.icd.test;

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.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;

/**
 *
 * @author changzhenghe
 */
public class RAMDirectoryDemo {
    public static void main(String[] args) throws IOException {
        long startTime = System.currentTimeMillis();
        System.err.println("***************************  ****************************");
        RAMDirectory directory = new RAMDirectory();

        Version matchVersion = Version.LUCENE_48;

        Analyzer analyzer = new StandardAnalyzer(matchVersion);
        IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_48, analyzer);
        iwc.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
        IndexWriter writer = new IndexWriter(directory, iwc);

        Document doc = new Document();
        doc.add(new Field("name", "Chenghui", Field.Store.YES, Field.Index.ANALYZED));
        doc.add(new Field("sex", "", Field.Store.YES, Field.Index.NOT_ANALYZED));
        doc.add(new Field("dosometing", "I am learning lucene ", Field.Store.YES, Field.Index.ANALYZED));

        writer.addDocument(doc);
        writer.close();

        IndexReader reader = DirectoryReader.open(directory);
        IndexSearcher searcher = new IndexSearcher(reader);

        Query query = new TermQuery(new Term("dosometing", "lucene"));

        TopDocs rs = searcher.search(query, null, 10);
        long endTime = System.currentTimeMillis();
        System.out.println(
                "" + (endTime - startTime) + "" + rs.totalHits + "?");

        for (int i = 0; i < rs.scoreDocs.length; i++) {
            // rs.scoreDocs[i].doc ??id, 0  
            Document firstHit = searcher.doc(rs.scoreDocs[i].doc);
            System.out.println("name:" + firstHit.getField("name").stringValue());
            System.out.println("sex:" + firstHit.getField("sex").stringValue());
            System.out.println("dosomething:" + firstHit.getField("dosometing").stringValue());
        }
        reader.close();
        directory.close();
        System.out.println("*****************?**********************");
    }
}