Open Source Java Web Scrapers

DSTK - DataScience ToolKit is an opensource free software for statistical analysis, data visualization, text analysis, and predictive analytics. Newer version and smaller file size can be found at: https://sourceforge.net/projects/dstk3/ It is designed to be straight forward and easy to use, and familar to SPSS user. While JASP offers more statistical features, DSTK tends to be a broad solution workbench, including text analysis and predictive analytics features. Of course you may specify JASP for advanced data editing and RapidMiner for advanced prediction modeling. DSTK is written in C#, Java and Python to interface with R, NLTK, and Weka. It can be expanded with plugins using R Scripts. We have also created plugins for more statistical functions, and Big Data Analytics with Microsoft Azure HDInsights (Spark Server) with Livy. License: R, RStudio, NLTK, SciPy, SKLearn, MatPlotLib, Weka, ... each has their own licenses.

webStraktor is a programmable World Wide Web data extraction client. Its purpose is to scrape HTML based content via the HTTP protocol and extract relevant information. webStraktor features a scripting language to facilitate the collection, the extraction and the storage of information available on the web, including images. The scripting language uses elements of the Regular Expression and xPath syntax. The webStraktor scripting language has a small instruction set and its syntax is easy to master. The standard webStraktor output format is XML based, either in ASCII, UTF-8 or ISO-8859-1 (Latin1) code pages. webStraktor relies on the Apache HttpClient for retrieving content via the HTTP protocol. It adheres to the Robots Exclusion Protocol and it can be configured to operate in an anonymous way by connecting to the predominant types of web proxy servers. webStraktor extends the functionality of web crawlers, spiders or bots by integrating scraping and crawling capabilities.