Open Source Java Web Scrapers

Use as an image gallery, wallpaper, audio/music, video, document, and other media bulk downloader from supported websites. Also use to download sequential website urls that have a certain pattern (e.g. image01.png to image100.png). Also use app's built-in site crawler for advanced link search or extraction. There is also special support for forum media and open directory downloading. It's a programmable downloader and also works with password protected sites. Say goodbye to downloading one by one. Go to the Help menu or check out website to get started. Note that this cross-platform version requires Java (minimum version Java 8) to be installed on your Operating System. For non-java required OS specific versions, check app's website.

WebMagic is a scalable crawler framework. It covers the whole lifecycle of crawler, downloading, url management, content extraction and persistent. It can simplify the development of a specific crawler. WebMagic is a simple but scalable crawler framework. You can develop a crawler easily based on it. WebMagic has a simple core with high flexibility, a simple API for html extracting. It also provides annotation with POJO to customize a crawler, and no configuration is needed. Some other features include the fact that it is multi-thread and has distribution support. WebMagic is very easy to integrate. Add dependencies to your pom.xml. WebMagic use slf4j with slf4j-log4j12 implementation. If you customized your slf4j implementation, please exclude slf4j-log4j12. You can write a class implementation of PageProcessor.

jsoup is a Java library for working with real-world HTML. It provides a very convenient API for fetching URLs and extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors. jsoup implements the WHATWG HTML5 specification, and parses HTML to the same DOM as modern browsers do. jsoup is designed to deal with all varieties of HTML found in the wild; from pristine and validating, to invalid tag-soup; jsoup will create a sensible parse tree. The parser will make every attempt to create a clean parse from the HTML you provide, regardless of whether the HTML is well-formed or not. You have HTML in a Java String, and you want to parse that HTML to get at its contents, or to make sure it's well formed, or to modify it. The String may have come from user input, a file, or from the web.

Golang-based distributed web crawler management platform, supporting various languages including Python, NodeJS, Go, Java, PHP and various web crawler frameworks including Scrapy, Puppeteer, Selenium. Please use docker-compose to one-click to start up. By doing so, you don't even have to configure MongoDB database. The frontend app interacts with the master node, which communicates with other components such as MongoDB, SeaweedFS and worker nodes. Master node and worker nodes communicate with each other via gRPC (a RPC framework). Tasks are scheduled by the task scheduler module in the master node, and received by the task handler module in worker nodes, which executes these tasks in task runners. Task runners are actually processes running spider or crawler programs, and can also send data through gRPC (integrated in SDK) to other data sources, e.g. MongoDB.

The archive-crawler project is building Heritrix: a flexible, extensible, robust, and scalable web crawler capable of fetching, archiving, and analyzing the full diversity and breadth of internet-accesible content.

This project is a java web spider (web crawler) with the ability to download (and resume) files. It is also highly customizable with regular expressions and download templates. All backend functionalities are also available in a separate library.

Android app for saving webpages for offline reading. Save For Offline is an Android app for saving full web pages for offline reading, with lots of features and options. In you web browser selects 'Share', and then 'Save For Offline'. Saves real HTML files which can be opened in other apps/devices. Download & save entire web pages with all assets for offline reading & viewing. Save HTML files in a custom directory. Save in the background, no need to wait for it to finish saving. Night mode, with both a dark theme, and can invert colors when viewing pages (White becomes black and vice-versa). A search of saved pages (By title only for now). User-agent change allows the saving of either desktop or mobile versions of pages. Nice UI for both phones and tablets, with various choices for layout and appearance.

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.

In Files there is WebCrawlerMySQL.jar which supports MySql Connection Free Web Spider & Crawler. Extracts Information from Web by parsing millions of pages. Store data into Derby Database and data are not being lost after force closing the spider. - Free Web Spider , Parser, Extractor, Crawler - Extraction of Emails , Phones and Custom Text from Web - Export to Excel File - Data Saved into Derby and MySQL Database - Written in Java Cross Platform Also See Free email Sender : https://sourceforge.net/projects/gitst-free-email-ender/ Please install Microsoft OpenJDK to start the application https://www.microsoft.com/openjdk

A Java implementation of a flexible and extensible web spider engine. Optional modules allow functionality to be added (searching dead links, testing the performance and scalability of a site, creating a sitemap, etc ..

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.

ACHE is a focused web crawler. It collects web pages that satisfy some specific criteria, e.g., pages that belong to a given domain or that contain a user-specified pattern. ACHE differs from generic crawlers in sense that it uses page classifiers to distinguish between relevant and irrelevant pages in a given domain. A page classifier can be defined as a simple regular expression (e.g., that matches every page that contains a specific word) or a machine-learning-based classification model. ACHE also automatically learns how to prioritize links in order to efficiently locate relevant content while avoiding the retrieval of irrelevant pages. While ACHE was originally designed to perform focused crawls, it also supports other crawling tasks, including crawling all pages in a given web site and crawling Dark Web sites (using the TOR protocol).

Robust featureful multi-threaded CLI web spider using apache commons httpclient v3.0 written in java. ASpider downloads any files matching your given mime-types from a website. Tries to reg.exp. match emails by default, logging all results using log4j.

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

A new Web Crawler including sophisticated searching process especialized by language !

Constellio is an enterprise search engine that allows companies to search all their organization's information through a single interface (Web, CRM, ERP, ECM, Mail etc.). Constellio is Based on Apache Solr and Google Search Appliance's connector. Constellio has a powerful web crawler.

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.

The DeDuplicator is an add-on module (plug-in) for the web crawler Heritrix. It offers a means to reduce the amount of duplicate data collected in a series of snapshot crawls.

Ever wanted to download only a part of a Git repository. Just paste the URL of the repo you want to download and sit back and enjoy. This simple java application makes use of Web Scraping and downloads only those files you need, thus helping you save your precious bandwidth and space.

HtmlClient provides an SGML/HTML/XHTML parser and connection client making web-spidering as easy for developers as actually surfing the web with a premade browser. Based on Apache's HttpClient.

J-Obey is a Java Library/package, which allows people writing their own crawlers to have a stable Robots.txt parser, if you are writing a web crawler of some sort you can use J-Obey to take out the hassle of writing a Robots.txt parser/intrepreter.

Spider web scritto in java che consente un utilizzo sia come applicazione stand alone, sia come core di altre applicazioni che sfruttino le sue funzionalità.

NightCrawler is a multithreaded web spider which uses MIME types to download files.

Yet another web crawler? Yes, but this ones uses the full power of regular expressions to accept or reject, examine or ignore, save or refuse pages. You also use MIME types to do all this. Powerful and flexible.

Other spiders has a limited link depth, follows links not randomized or are combined with heavy indexing machines. This spider will has not link depth limits, randomize next url, that will be checked for new urls.