I have added only one TextField to keep the example simple. Each Document consist of multiple fields. The Document is Lucene provided class, we create Document objects and pass to indexWriter object.
The createIndex method actually creates the index using indexWriter and data (given in the form to Document objects). So StandardAnalyzer is very helpful for common search cases. So keyword identification is required before the indexing process.Īpache Lucene provide different type of Analyzers and mechanism to plug custom Analyzers, StandardAnalyzer extract tokens out of the text, lower case the tokens, eliminates common words and punctuations, etc. For example, if you see a index at the end of a book, its contains keywords used in the book. Without Analyzer, IndexWriter can't create the index. Analyzer helps to create right tokens or keywords from given text. The constructor instantiate IndexWriter object that is used to create index. Public Indexer(String indexerDirectoryPath) throws Exception ĭocument.add(new TextField("title", title, Store.YES))
#Apache lucene tutorial java software
2001 wurde Lucene ein Teil des Jakarta-Projekts und 2005 ein Hauptprojekt der Apache Software Foundation. Der Name Lucene ist der zweite Vorname von Doug Cuttings Ehefrau. So lets first create an index of some data: Lucene wurde von Doug Cutting entwickelt und war seit 1997 zunächst über SourceForge erhältlich. Then we run the search operation on that index. To search something using Apache Lucene, we need to create an index of data. Download the latest version of Lucene from the Apache website, and unzip it. In this article we want to achieve same functioanlity using Lucene search engine library. If you dont have a Java development environment set up already, see the Java documentation. In result Google has highlighted these terms in URL and description. Notice, there are three query terms: java, inheritance and bitspedia.
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