Tips from Sony Thomas

Please find below the Lucene sample JAVA code to search the files inside a folder. This code will search the indexed folder for a search query in an indexed field. This java code is expecting the index path ( where the index files were created ) , field which need to be searched and the query need be searched as program arguments like  "java SearchFiles [-index dir] [-field f] [-query string]" . import java.io.File; import java.util.ArrayList; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.queryParser.QueryParser; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.TopDocs; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.Version; public class SearchFiles { public static void main(Stri...

Please find below the Lucene sample code to index the files inside a folder. This code will index ( or create fields for ) the file path, file title, modified date and contents of the file. This java code is expecting the index path ( where the index files will be created ) and file folder path as program arguments like  "java IndexFiles  [-index INDEX_PATH] [-docs DOCS_PATH]" . The logic of the code is to iterate through each file in the folder and call the method indexDoc(), where the above said fields are created and added to a Document object. This means that for each file there will be a document object and these document objects will be added to IndexWriter. Please find below the screen shot of the indexd file folder : import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.util.Date; import org.apache.lucene.analysis.Analyzer; import org.apa...

Lucene home page –> http://lucene.apache.org/ Download Lucene from –> http://www.apache.org/dyn/closer.cgi/lucene/java/ Lucene API Doc –> http://lucene.apache.org/java/docs/api/index.html Lucene docs for each release –> http://lucene.apache.org/java/docs/ Where can I get help from –> java-user@lucene.apache.org Lucene wiki  –> http://wiki.apache.org/lucene-java/FrontPage Lucene , how to improve search speed –> http://wiki.apache.org/lucene-java/ImproveSearchingSpeed Lucene , how to improve index speed  –>   http://wiki.apache.org/lucene-java/ImproveIndexingSpeed Lucene FAQ –> http://wiki.apache.org/lucene-java/LuceneFAQ

Apache Lucene is a high-performance, full featured text search engine library written entirely in Java. It is part of Apache Jakarta Project. Lucene was originally written by Doug Cutting in Java. While suitable for any application which requires full text indexing and searching capability, Lucene has been widely recognized for its utility in the implementation of Internet search engines and local, single-site searching. Lucene is Doug Cutting’s wife’s middle name ! Features 1. Scalable, High-Performance Indexing Over 95GB/hour on modern hardware Small RAM requirements — only 1MB heap Incremental indexing as fast as batch indexing Index size roughly 20-30% the size of text indexed 2. Powerful, Accurate and Efficient Search Algorithms Ranked searching — best results returned first Sorting by any field Multiple-index searching with merged results Allows simultaneous update and searching 3. Flexible Queries Phrase queries –>  like “star wars” –> searc...