Open Source Java Search Engines

The Hibernate projects offer a suite of powerful Java libraries to work with data. It is best known for Hibernate ORM, which provides relational persistence for Java models and is an implementation of the Jakarta Persistence specification. Hibernate projects do not consistently release binaries or documentation to SourceForge anymore. For up-to-date information, refer to the Hibernate website: * Hibernate ORM: https://hibernate.org/orm/ * Hibernate Validator: https://hibernate.org/validator/ * Hibernate Search: https://hibernate.org/search/ That website will also be updated with newer projects, such as Hibernate Reactive.

Web data extraction (web data mining, web scraping) tool. It leverages well proved XML and text processing techologies in order to easely extract useful data from arbitrary web pages.

NekoHTML is a simple HTML scanner and tag balancer that enables application programmers to parse HTML documents and access the information using standard XML interfaces.

Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems (file systems, web sites, mail boxes, ...) and the file formats (documents, images, ...) occurring in these systems.

Project moved to GitHub! https://github.com/carrot2/carrot2 Carrot2 is an Open Source Search Results Clustering Engine. It can automatically organize small collections of documents, e.g. search results, into thematic categories. Carrot2 integrates very well with both Open Source and proprietary search engines.

A drop-in framework for adding tagging (folksonomy) capabilities to existing applications

Arachnid is a Java-based web spider framework. It includes a simple HTML parser object that parses an input stream containing HTML content. Simple Web spiders can be created by sub-classing Arachnid and adding a few lines of code called after each page

Aracnis is a Java based framework for building distributed web spiders. These spiders can be used to accomplish a variety of tasks, for example, screen-scraping and link integrity checking.

The Batino Browser is the next generation rich web browser platform. It is based on Eclipse technology.

Maven Repositoty Artifact Search/Browser

DoxMentor4J is a standalone cross platform Web/Ajax based documentation library that is fully searchable and may be hosted in the file system, in an archive or embedded in the Java classpath.

Frosttie (FROnt-end SchemaTron Text Internet Engine) takes XHTML pages and processes them with various user-definable filters such a W3C's WAI, Section 508 (US) web usability compliance, ad removal, etc. It can be used with zKnowMan.

Group-CCS development Components, templates, tools, accessories, tutorial, modules, translations, documentation, codes, scripts, everything that can improve the work of who uses the powerful tool of development, CCS - CodeCharge Studio.

Hoople is like attribute-oriented programming for URLs. Rather than having the configuration information and “URL Logic” spread throughout the site, you create a single XML configuration file that contains all the “logic” for each URL on the file

JLinkCheck is an Ant Task written in Java for checking links in websites. It is not just checking one single page, but crawling a whole site like a spider, generating a report in XML and (X)HTML. JReptator will be its succesor with many more features

JMdRdf is the tool which creates RDF/RSS. 1.You can generate RDF/RSS about your homepage from your HTML(s) without programming. JMdRdf extract Information such as title, description, etc automatically from HTML. 2.You can paste RDF/RSS into your HTML

The complete suggestions framework for java, supporting single and multi field suggest, java suggest box, client/server with hessian or json-rpc, and GWT AJAX suggest box, phonetic plugins. Proven high performance for data sets > 1 Mio.

JavaMatch is an engine that can search inside a runtime Java data structures, and look for objects that best match the criteria that you specify. The extensive query mechanism allows for highly customizable tuning of your match queries.

Web-as-corpus tools in Java. * Simple Crawler (and also integration with Nutch and Heritrix) * HTML cleaner to remove boiler plate code * Language recognition * Corpus builder

JeCARS (Java Extendable Contents And Rights System) is a RESTful webservice which delivers pluggable output formats, e.g. Atom feeds or HTML. Third party applications can be plugged in. A JCR (JSR-170) repository (Jackrabbit) is used for storage.

MAOS (Meta-Attribute Object Store) is a light-weight Java library / framework implementing simple Object persistence using search-engine technology

This project intends to create an indexing search engine, for knowledge management. The primary object is to apply an information retrieval core. And implement a knowledge data discovery theory such as data mining algorithm, text mining.

The Informa library provides a convenient Java API for handling news channels and metadata about them. Different syntax formats (RSS 0.91, 1.0, 2.0 and Atom 0.3, 1.0) for feeds are supported. Also support for channel information descriptions (OPML) avail

OpenEphyra is an open framework for question answering (QA). It retrieves answers to natural language questions from the Web and other sources. Visit http://www.ephyra.info/ for more details and information on joining this open research initiative.

OpenMKS is a search & navigational tool for large multimedia collections. With pluggable functionality and a core subsystem supporting the z39.50 ZING Community SRW search & retrieval specification, it can be run either as a Servlet or as a Web Service.