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#BTJD*OEFYJOH"1* "DPEFFYBNQMFUPCVJMEB-VDFOFJOEFY // Create a directory for storing Lucene index Path indexDirPath = Files.createDirectory(Path.of("index")); Directory directory = FSDirectory.open(indexDirPath); // Set up IndexWriter Analyzer analyzer = new StandardAnalyzer(); IndexWriterConfig config = new IndexWriterConfig(analyzer); IndexWriter indexWriter = new IndexWriter(directory, config); // Index a document: "Lucene in Action" Document doc1 = new Document(); doc1.add(new Field("title", "Lucene in Action", TextField.TYPE_STORED)); indexWriter.addDocument(doc1); // Index a document: "Lucene Cookbook" Document doc2 = new Document(); doc2.add(new Field("title", "Lucene Cookbook", TextField.TYPE_STORED)); indexWriter.addDocument(doc2); // Write index to the directory indexWriter.close();

#BTJD*OEFYJOH"1* "DPEFFYBNQMFUPCVJMEB-VDFOFJOEFY w FSDirectory w DirectoryʢετϨʔδΞΫηε"1*ʣͷ࣮૷ͷҰͭ w ϑΝΠϧγεςϜ΁ͷΞΫηεΛఏڙ͢Δ w Directoryͷ࣮૷ʹ͸ଞʹ΋RAMDirectoryͳͲ͕͋Δ // Create a directory for storing Lucene index Path indexDirPath = Files.createDirectory(Path.of("index")); Directory directory = FSDirectory.open(indexDirPath); // Set up IndexWriter Analyzer analyzer = new StandardAnalyzer(); IndexWriterConfig config = new IndexWriterConfig(analyzer); IndexWriter indexWriter = new IndexWriter(directory, config); // Index a document: "Lucene in Action" Document doc1 = new Document(); doc1.add(new Field("title", "Lucene in Action", TextField.TYPE_STORED)); indexWriter.addDocument(doc1); // Index a document: "Lucene Cookbook" Document doc2 = new Document(); doc2.add(new Field("title", "Lucene Cookbook", TextField.TYPE_STORED)); indexWriter.addDocument(doc2); // Write index to the directory indexWriter.close();

#BTJD*OEFYJOH"1* "DPEFFYBNQMFUPCVJMEB-VDFOFJOEFY w FSDirectory w DirectoryʢετϨʔδΞΫηε"1*ʣͷ࣮૷ͷҰͭ w ϑΝΠϧγεςϜ΁ͷΞΫηεΛఏڙ͢Δ w Directoryͷ࣮૷ʹ͸ଞʹ΋RAMDirectoryͳͲ͕͋Δ w IndexWriter w ΠϯσοΫεͷॻ͖ࠐΈΛΦʔέετϨʔγϣϯ͢ΔΫϥε // Create a directory for storing Lucene index Path indexDirPath = Files.createDirectory(Path.of("index")); Directory directory = FSDirectory.open(indexDirPath); // Set up IndexWriter Analyzer analyzer = new StandardAnalyzer(); IndexWriterConfig config = new IndexWriterConfig(analyzer); IndexWriter indexWriter = new IndexWriter(directory, config); // Index a document: "Lucene in Action" Document doc1 = new Document(); doc1.add(new Field("title", "Lucene in Action", TextField.TYPE_STORED)); indexWriter.addDocument(doc1); // Index a document: "Lucene Cookbook" Document doc2 = new Document(); doc2.add(new Field("title", "Lucene Cookbook", TextField.TYPE_STORED)); indexWriter.addDocument(doc2); // Write index to the directory indexWriter.close();

#BTJD*OEFYJOH"1* "DPEFFYBNQMFUPCVJMEB-VDFOFJOEFY w FSDirectory w DirectoryʢετϨʔδΞΫηε"1*ʣͷ࣮૷ͷҰͭ w ϑΝΠϧγεςϜ΁ͷΞΫηεΛఏڙ͢Δ w Directoryͷ࣮૷ʹ͸ଞʹ΋RAMDirectoryͳͲ͕͋Δ w IndexWriter w ΠϯσοΫεͷॻ͖ࠐΈΛΦʔέετϨʔγϣϯ͢ΔΫϥε w addDocument()ϝιουͰDocumentΛ௥Ճ // Create a directory for storing Lucene index Path indexDirPath = Files.createDirectory(Path.of("index")); Directory directory = FSDirectory.open(indexDirPath); // Set up IndexWriter Analyzer analyzer = new StandardAnalyzer(); IndexWriterConfig config = new IndexWriterConfig(analyzer); IndexWriter indexWriter = new IndexWriter(directory, config); // Index a document: "Lucene in Action" Document doc1 = new Document(); doc1.add(new Field("title", "Lucene in Action", TextField.TYPE_STORED)); indexWriter.addDocument(doc1); // Index a document: "Lucene Cookbook" Document doc2 = new Document(); doc2.add(new Field("title", "Lucene Cookbook", TextField.TYPE_STORED)); indexWriter.addDocument(doc2); // Write index to the directory indexWriter.close();

#BTJD*OEFYJOH"1* "DPEFFYBNQMFUPCVJMEB-VDFOFJOEFY w FSDirectory w DirectoryʢετϨʔδΞΫηε"1*ʣͷ࣮૷ͷҰͭ w ϑΝΠϧγεςϜ΁ͷΞΫηεΛఏڙ͢Δ w Directoryͷ࣮૷ʹ͸ଞʹ΋RAMDirectoryͳͲ͕͋Δ w IndexWriter w ΠϯσοΫεͷॻ͖ࠐΈΛΦʔέετϨʔγϣϯ͢ΔΫϥε w addDocument()ϝιουͰDocumentΛ௥Ճ w close()͢ΔͱʢσϑΥϧτͷઃఆͰ͸ʣDirectoryʹ ॻ͖ࠐΉ // Create a directory for storing Lucene index Path indexDirPath = Files.createDirectory(Path.of("index")); Directory directory = FSDirectory.open(indexDirPath); // Set up IndexWriter Analyzer analyzer = new StandardAnalyzer(); IndexWriterConfig config = new IndexWriterConfig(analyzer); IndexWriter indexWriter = new IndexWriter(directory, config); // Index a document: "Lucene in Action" Document doc1 = new Document(); doc1.add(new Field("title", "Lucene in Action", TextField.TYPE_STORED)); indexWriter.addDocument(doc1); // Index a document: "Lucene Cookbook" Document doc2 = new Document(); doc2.add(new Field("title", "Lucene Cookbook", TextField.TYPE_STORED)); indexWriter.addDocument(doc2); // Write index to the directory indexWriter.close();

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#BTJD4FBSDI"1* "DPEFFYBNQMFUPTFBSDIB-VDFOFJOEFY // Open a directory which stores index Directory directory = FSDirectory.open(Path.of("index")); // Create an IndexSearcher IndexReader indexReader = DirectoryReader.open(directory); IndexSearcher indexSearcher = new IndexSearcher(indexReader); // Create Query object that searches for "lucene" on "title" field Query query = new TermQuery(new Term("title", "lucene")); TopDocs results = indexSearcher.search(query, 10); ScoreDoc[] hits = results.scoreDocs; // Iterate through the results for (ScoreDoc hit : hits) { Document hitDoc = indexSearcher.doc(hit.doc); System.out.println("Hit: " + hitDoc.get("title")); } // Post-processing indexReader.close(); directory.close(); w IndexSearcher w IndexReaderΛ௨ͯ͠ΠϯσοΫεʹΞΫηε

#BTJD4FBSDI"1* "DPEFFYBNQMFUPTFBSDIB-VDFOFJOEFY // Open a directory which stores index Directory directory = FSDirectory.open(Path.of("index")); // Create an IndexSearcher IndexReader indexReader = DirectoryReader.open(directory); IndexSearcher indexSearcher = new IndexSearcher(indexReader); // Create Query object that searches for "lucene" on "title" field Query query = new TermQuery(new Term("title", "lucene")); TopDocs results = indexSearcher.search(query, 10); ScoreDoc[] hits = results.scoreDocs; // Iterate through the results for (ScoreDoc hit : hits) { Document hitDoc = indexSearcher.doc(hit.doc); System.out.println("Hit: " + hitDoc.get("title")); } // Post-processing indexReader.close(); directory.close(); w IndexSearcher w IndexReaderΛ௨ͯ͠ΠϯσοΫεʹΞΫηε w TermQuery w TermʢసஔΠϯσοΫεʹ͓͚ΔΩʔʣͰݕࡧ w BOBMZ[FޙͷςΩετΛ౉͢ w -VDFOFͰݕࡧͯ͠΋ώοτͤͣɺMVDFOFͳΒώοτ

#BTJD4FBSDI"1* "DPEFFYBNQMFUPTFBSDIB-VDFOFJOEFY w IndexSearcher w IndexReaderΛ௨ͯ͠ΠϯσοΫεʹΞΫηε w TermQuery w TermʢసஔΠϯσοΫεʹ͓͚ΔΩʔʣͰݕࡧ w BOBMZ[FޙͷςΩετΛ౉͢ w -VDFOFͰݕࡧͯ͠΋ώοτͤͣɺMVDFOFͳΒώοτ w IndexSearcher#search()ʹ౉ͯ͠ݕࡧ w TopDocsʢ5PQLͷ݁Ռʣ͕ಘΒΕΔ // Open a directory which stores index Directory directory = FSDirectory.open(Path.of("index")); // Create an IndexSearcher IndexReader indexReader = DirectoryReader.open(directory); IndexSearcher indexSearcher = new IndexSearcher(indexReader); // Create Query object that searches for "lucene" on "title" field Query query = new TermQuery(new Term("title", "lucene")); TopDocs results = indexSearcher.search(query, 10); ScoreDoc[] hits = results.scoreDocs; // Iterate through the results for (ScoreDoc hit : hits) { Document hitDoc = indexSearcher.doc(hit.doc); System.out.println("Hit: " + hitDoc.get("title")); } // Post-processing indexReader.close(); directory.close();

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