Java tutorial
package index; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.nio.charset.StandardCharsets; import java.nio.file.FileVisitResult; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import java.nio.file.SimpleFileVisitor; import java.nio.file.attribute.BasicFileAttributes; import java.util.Date; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.LongPoint; import org.apache.lucene.document.StoredField; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.document.StringField; import org.apache.lucene.document.TextField; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.index.IndexWriterConfig.OpenMode; import org.apache.lucene.index.IndexWriterConfig; import org.apache.lucene.index.Term; import org.apache.lucene.store.Directory; import org.apache.lucene.store.FSDirectory; public class IndexOmimtsv { /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ /** Index all text files under a directory. * <p> * This is a command-line application demonstrating simple Lucene indexing. * Run it with no command-line arguments for usage information. */ private IndexOmimtsv() { } /** Index all text files under a directory. */ public static void main(String[] args) { Date start = new Date(); final Path docDir = Paths.get("F:/Ecole(Telecom)/cours telecom/Projet_GMD/bases/omimtsv.tsv"); //final Path docDir = Paths.get("C:/Users/lulu/Desktop/Projet/Donnes/stitch/chemical.sources.v5.0.tsv"); try { System.out.println("Indexing to directory '" + "C:/Users/gauthier/Desktop/TELECOM/2A/GMD/Projet/indexOmimtsv" + "'..."); Directory dir = FSDirectory .open(Paths.get("F:/Ecole(Telecom)/cours telecom/Projet_GMD/indexs/indexOmimtsv")); //Directory dir = FSDirectory.open(Paths.get("C:/Users/lulu/Desktop/Projet/Donnes/stitch")); Analyzer analyzer = new StandardAnalyzer(); IndexWriterConfig iwc = new IndexWriterConfig(analyzer); iwc.setOpenMode(OpenMode.CREATE); // Optional: for better indexing performance, if you // are indexing many documents, increase the RAM // buffer. But if you do this, increase the max heap // size to the JVM (eg add -Xmx512m or -Xmx1g): // // iwc.setRAMBufferSizeMB(256.0); IndexWriter writer = new IndexWriter(dir, iwc); indexDocs(writer, docDir); // NOTE: if you want to maximize search performance, // you can optionally call forceMerge here. This can be // a terribly costly operation, so generally it's only // worth it when your index is relatively static (ie // you're done adding documents to it): // // writer.forceMerge(1); writer.close(); Date end = new Date(); System.out.println(end.getTime() - start.getTime() + " total milliseconds"); } catch (IOException e) { System.out.println(" caught a " + e.getClass() + "\n with message: " + e.getMessage()); } } /* 135 * Indexes the given file using the given writer, or if a directory is given, 136 * recurses over files and directories found under the given directory. 137 * 138 * NOTE: This method indexes one document per input file. This is slow. For good 139 * throughput, put multiple documents into your input file(s). An example of this is 140 * in the benchmark module, which can create "line doc" files, one document per line, 141 * using the 142 * <a href="../../../../../contrib-benchmark/org/apache/lucene/benchmark/byTask/tasks/WriteLineDocTask.html" 143 * >WriteLineDocTask</a>. 144 * 145 * @param writer Writer to the index where the given file/dir info will be stored 146 * @param path The file to index, or the directory to recurse into to find files to index 147 * @throws IOException If there is a low-level I/O error 148 */ static void indexDocs(final IndexWriter writer, Path path) throws IOException { if (Files.isDirectory(path)) { Files.walkFileTree(path, new SimpleFileVisitor<Path>() { @Override public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException { try { indexDoc(writer, file, attrs.lastModifiedTime().toMillis()); } catch (IOException ignore) { // don't index files that can't be read. } return FileVisitResult.CONTINUE; } }); } else { indexDoc(writer, path, Files.getLastModifiedTime(path).toMillis()); } } /** Indexes a single document */ static void indexDoc(IndexWriter writer, Path file, long lastModified) throws IOException { try (InputStream stream = Files.newInputStream(file)) { // make a new, empty document Document doc = new Document(); // Add the path of the file as a field named "path". Use a // field that is indexed (i.e. searchable), but don't tokenize // the field into separate words and don't index term frequency // or positional information: Field pathField = new StringField("path", file.toString(), Field.Store.YES); doc.add(pathField); // Add the last modified date of the file a field named "modified". // Use a LongPoint that is indexed (i.e. efficiently filterable with // PointRangeQuery). This indexes to milli-second resolution, which // is often too fine. You could instead create a number based on // year/month/day/hour/minutes/seconds, down the resolution you require. // For example the long value 2011021714 would mean // February 17, 2011, 2-3 PM. doc.add(new LongPoint("20110227030432", lastModified)); // Add the contents of the file to a field named "contents". Specify a Reader, // so that the text of the file is tokenized and indexed, but not stored. // Note that FileReader expects the file to be in UTF-8 encoding. // If that's not the case searching for special characters will fail. InputStreamReader ipsr = new InputStreamReader(stream); BufferedReader br = new BufferedReader(ipsr); String line = br.readLine(); int cpt = 0; while ((line = br.readLine()) != null) { String[] tokens = line.trim().split("\t"); if (tokens.length > 6) { String id = tokens[0].split("/")[tokens[0].split("/").length - 1].trim(); if (id.matches("^[0-9]*")) { doc = new Document(); cpt++; doc.add(new TextField("ID", id, Field.Store.NO)); if (!tokens[5].trim().matches("^C[0-9].*")) { for (String token : tokens) { if (token.trim().matches("^C[0-9].*")) { doc.add(new StoredField("CUI", token.trim())); break; } } if (doc.getFields().size() != 2) doc.add(new StoredField("CUI", "")); } else doc.add(new StoredField("CUI", tokens[5].trim())); doc.add(new StoredField("Label", tokens[1].trim())); writer.addDocument(doc); } } } System.out.println("Nombre d'lments : " + cpt); if (writer.getConfig().getOpenMode() == OpenMode.CREATE) { // New index, so we just add the document (no old document can be there): System.out.println("adding " + file); writer.addDocument(doc); } else { // Existing index (an old copy of this document may have been indexed) so // we use updateDocument instead to replace the old one matching the exact // path, if present: System.out.println("updating " + file); writer.updateDocument( new Term("F:/Ecole(Telecom)/cours telecom/Projet_GMD/bases/chemical.sources.v5.0.tsv", file.toString()), doc); } } } }