Lucene is a subproject of the Apache Software Foundation 4 Jakarta Project group, an open source full-Text Search engine toolkit, which is not a full-text search engine, but a full-text search engine architecture that provides a complete query engine and index engine. Part of the text analysis engine (English and German two Western languages). Lucene's goal is to provide software developers with an easy-to-use toolkit to facilitate full-text retrieval in the target system, or to build a complete full-text search engine on this basis
SOLR is a stand-alone enterprise Search application server that provides API interfaces similar to Web-service. The user can submit an XML file of a certain format to the search engine server via an HTTP request, generate an index, or make a lookup request through an HTTP GET operation and get the returned result in XML format.
Open source Search technology-lucene, SOLR