HW1.SearchFiles.java Source code

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Here is the source code for HW1.SearchFiles.java

Source

package HW1;
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.nio.file.Paths;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.similarities.BM25Similarity;
import org.apache.lucene.store.FSDirectory;

public class SearchFiles {

    private SearchFiles() {
    }

    public static void main(String[] args) throws Exception {
        String queryString = "dislike football";

        String indexPath = "/Users/yangyang/Desktop/lucene/hw1/index/index04";
        IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(indexPath)));

        IndexSearcher searcher = new IndexSearcher(reader);
        Analyzer analyzer = new StandardAnalyzer();
        searcher.setSimilarity(new BM25Similarity());

        QueryParser parser = new QueryParser("TEXT", analyzer);
        Query query = parser.parse(queryString);
        System.out.println("Searching for: " + query.toString("TEXT"));

        TopDocs results = searcher.search(query, 10);
        ScoreDoc[] hits = results.scoreDocs;

        int numTotalHits = results.totalHits;
        System.out.println(numTotalHits + " total matching documents");

        for (int i = 0; i < hits.length; i++) {
            Document doc = searcher.doc(hits[i].doc);
            System.out.println("DOCNO: " + doc.get("DOCNO"));
        }

        reader.close();
    }
}