![]() It scores text fragments by the number of unique query terms found Uses HTML tag to highlight the searched termsįormatter formatter = new SimpleHTMLFormatter()Query query = qp.parse("cottage private discovery concluded") QueryParser qp = new QueryParser("contents", analyzer) Query parser to be used for creating TermQuery IndexSearcher searcher = new IndexSearcher(reader) IndexReader reader = DirectoryReader.open(dir) Index reader - an interface for accessing a point-in-time view of a lucene index Public static void main(String args) throws Exceptionĭirectory dir = FSDirectory.open(Paths.get(INDEX_DIR)) Private static final String INDEX_DIR = "indexedFiles" This contains the lucene indexed documents Public class LuceneSearchHighlighterExample Use token stream and highlighter to get array of text fragments.Create TokenStream by document id and document text for the field.Retrieve document text using document id from above step.In short, this is what we need to do to highlight searched terms in text: The field where search term needs to be highlighted – MUST BE STORED. Writer.updateDocument(new Term("path", file.toString()), doc) The delete and then add are atomic as seen ![]() containing term and then adding the new Updates a document by first deleting the document(s) Try (InputStream stream = Files.newInputStream(file))ĭoc.add(new StringField("path", file.toString(), )) ĭoc.add(new LongPoint("modified", lastModified)) ĭoc.add(new TextField("contents", new String(Files.readAllBytes(file)), Store.YES)) Static void indexDoc(IndexWriter writer, Path file, long lastModified) throws IOException IndexDoc(writer, path, Files.getLastModifiedTime(path).toMillis()) IndexDoc(writer, file, attrs.lastModifiedTime().toMillis()) Static void indexDocs(final IndexWriter writer, Path path) throws IOExceptionįiles.walkFileTree(path, new FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException Its recursive method to iterate all files and directories IndexWriter writer = new IndexWriter(dir, iwc) IndexWriter writes new index files to the directory Iwc.setOpenMode(OpenMode.CREATE_OR_APPEND) ![]() IndexWriterConfig iwc = new IndexWriterConfig(analyzer) .Directory instanceĭirectory dir = FSDirectory.open( Paths.get(indexPath) ) Īnalyzer analyzer = new StandardAnalyzer() Public class LuceneWriteIndexFromFileExample A YES value causes lucene to store the original field value in the index. If a document is indexed but not stored, you can search for it, but it won’t be returned with search results. indexedFiles – will contain lucene indexed documents.inputFiles – will contain all text files which we want to index.Please note that we will be using these two folders inside project: Project structure looks this now: Lucene Index File – Project Structure I am creating maven project to execute this example. Project Structure Index Text Files Content Search and Highlight searched terms Demo Sourcecode In this lucene 6 example, we will learn to search indexed documents and highlight searched term in search result using SimpleHTMLFormatter and SimpleSpanFragmenter. ![]()
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