How to Make a Web Crawler in Java in July, 2024
Whether you are looking to obtain data from a website, track changes on the internet, or use a website API, website crawlers are a great way to get the data you need. While they have many components, crawlers fundamentally use a simple process: download the raw data, process and extract it, and, if desired, store the data in a file or database. There are many ways to do this, and many languages you can build your spider or crawler in.
Java is an object-oriented programming language, that can both run as a scripting language and as compiled code. This makes it quite flexible and desired for many people in a wide variety of circumstances, including website crawler development.
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Web Scraping with Java Guide
This tutorial goes over how to download a webpage using the HtmlUnit dependency. It also goes over using xpaths to extract data from webpages, in addition to some other uses for web crawlers.
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A Guide to Crawler4j
This shows how to create a multiple web crawlers using crawler4j, including downloading text-based HTML pages and binary image data.
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How to make a simple webcrawler with JAVA ….(and jsoup)
This tutorial shows how to use jsoup to download pages from CNN. It’s relatively quick and simple.
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How To Build Web Crawler With Java
This tutorial by Damilare Jolayemi shows how to create a simple web crawler using Heritrix, JSoup, Apache Nutch, Stormcrawler, and Gecco.
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What is a Webcrawler and where is it used?
This tutorial shows how to create a web crawler from scratch in Java, including downloading pages and extracting links.
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jsoup – Basic Web Crawler Example
This tutorial shows how to create a basic web crawler using the jsoup library.
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How to Write a Web Crawler in Java
This is a tutorial written by Viral Patel on how to develop a website crawler using Java.
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How to make a Web Crawler using Java
This is a tutorial made by Program Creek on how to make a prototype web crawler using Java. This guide covers setting up the MySQL database, creating the database and the table, and provides sample code for building a simple web crawler.