Lucene MMapDirectory and ByteBuffersDirectory Example
In Lucene, ByteBuffersDirectory is for pure in-memory access for demos, and MMapDirectory uses memory-mapped files stored in the filesystem.
Lucene is a full-text search library completely written in Java. It adds the content to full-text index and then allows you to perform queries on this index, returning results ranked by either the relevance to the query or sorted by an arbitrary field such as a document’s last modified date.
Lucene index is inverted index, by design because it inverts a page-centric data structure (page->words) to a keyword-centric data structure (word->pages).
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Tutorials
Lucene RAMDirectory Example
In this Lucene 6 tutorial, we will learn to use RAMDirectory to run quick examples of POCs because it is not intended to work with huge indexes.
Lucene Wildcard Query Search Example
In Lucene, WildcardQuery can be used to execute wildcard based searches on lucene indexes. Learn to use WildcardQuery with example.
Lucene UnifiedHighlighter Example
Lucene UnifiedHighlighter is the highest-performing highlighter, especially for large documents. Tutorial to highlight search terms in indexed documents/files.
Lucene Search Highlight Example
In Lucene highlighter example, learn to search in documents and highlight search terms in search results using SimpleHTMLFormatter and Fragmenter.
Apache Lucene: Index and Search Text Files in Java
Index a folder of text files with Apache Lucene 10 and search it with QueryParser. We cover stored vs indexed fields, analyzers, the query syntax with real scores, invalid user queries and keeping the index in sync with the folder.
Lucene Tutorial: Getting Started (with Examples)
Learn to use Lucene 6 to create, index and search documents using code examples to read, write lucene documents and performing search over them.