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Instant Web Scraping with Java, by Ryan Mitchell
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Build simple scrapers or vast armies of Java-based bots to untangle and capture the Web
Overview
- Learn something new in an Instant! A short, fast, focused guide delivering immediate results
- Get your Java environment set up and running
- Gather clean, formatted web data into your own database
- Learn how to work around crawler-resistant websites and legally subvert security measures
- Use built-in Java features to perform parallel processing and distributed scraping
- Build test cases for your own websites using JUnit
In Detail
Java is often thought of as a stuffy enterprise language, while web scraping is the often-murky domain of scripting languages. By combining the robustness and extensibility of Java with the flexibility and power of web scraping, we can create immensely useful tools that can solve very difficult problems.
Instant Web Scraping with Java will guide you, step by step, through setting up your Java environment. You will also learn how to write simple web scrapers and distributed networks of crawlers. Throughout the book, we will provide useful tips, out-of-the-box working code, and additional resources to build expert knowledge.
Instant Web Scraping with Java will teach how to build your own web scrapers using real-world scraping examples that collect and store data from Wikipedia, public records data sites, IP address geolocation services, and more. You will learn how to run scrapers across multiple servers, run them in parallel, and subvert common methods of anti-scraper security used on modern websites. This book will also provide you with detailed step-by-step instructions, out-of-the-box working code, and expert pointers to further resources on key topics.
Instant Web Scraping with Java will show you how to view and collect any Internet data at the speed of your processor!
What you will learn from this book
- Set up your Java environment and work with the Eclipse IDE
- Execute complicated web crawlers that run without intervention
- Handle errors, documentation, and writing robust code
- Log scraped data for later retrieval and analysis
- Write code to test website content and functionality with the JUnit framework
- Learn techniques for getting around website security, designed to prevent automated scraping
- Fill and submit forms automatically
- Use threading to run scrapers in parallel
- Use Java’s Remote Machine Invocation to create multi-server distributed scrapers
Approach
Filled with practical, step-by-step instructions and clear explanations for the most important and useful tasks. This book is full of short, concise recipes to learn a variety of useful web scraping techniques using Java. You will start with a simple basic recipe of setting up your Java environment and gradually learn some more advanced recipes such as using complex Scrapers.
Who this book is written for
Instant Web Scraping with Java is aimed at developers who, while not necessarily familiar with Java, are at least ready to dive into the complexities of this language with simple, step-by-step instructions leading the way. It is assumed that you have at least an intermediate knowledge of HTML, some knowledge of MySQL, and access to an Internet-connected computer while doing most of the exercises (after all, scraping the Web is difficult if your code can’t get online!)
- Sales Rank: #2465656 in Books
- Published on: 2013-08-26
- Released on: 2013-08-26
- Original language: English
- Dimensions: 9.25" h x .17" w x 7.50" l, .0 pounds
- Binding: Paperback
- 72 pages
About the Author
Ryan Mitchell has ten years of programming experience, including Java, C, Perl, PHP, and Python. In addition to "traditional" programming, she specializes in web technologies, with three years of Drupal development experience, and is Sitecore developer certifi ed. She graduated from Olin College of Engineering and is currently studying at the Harvard University Extension School for a Masters in Software Engineering. In addition to academic life, she currently works at Velir Studios as a Web Systems Analyst, and has also worked as a developer for Harvard University and Abine Inc.
Most helpful customer reviews
0 of 0 people found the following review helpful.
I recommend this book for programmers wanting to build web tools using Java
By Robert Scavilla
I don't often leave reviews for technical books (I've been reading them for 35 years:). I also am cautious about buying technical books more than a year old. That said, I felt the author did a really good job here and I recommend this book for programmers wanting to build web tools using Java. The ideal reader would have a strong understanding of code and OOP, but not necessarily Java. The book doesn't cover all the details but gives you plenty to start with and the author is very good about providing links to additional resources. For me, the examples in the beginning of the book all worked well. Some of the examples deeper in worked with minor fixes.
The book covered Jsoup well enough for me to make use of it and it was easy for me to expand to advanced uses using online resources. HTMLUnit was introduced and a good example for working with forms was provided. Again I was easily able to expand on what the book covered using online resources.
My hat is off to the author for tackling distributed computing in the last chapter. Well done. This is the best introduction to RMI that I've come across.
0 of 0 people found the following review helpful.
I got this book to supplement the "Web Scraping with ...
By anonymousReviewer
I got this book to supplement the "Web Scraping with Python" book by the same author. I have much more experience in Java than Python and was hoping to stick with what i know. That being said, there are a couple issues i have come across in this book. The first and most problematic is that Ive struggled to get the example code to run. With the help of some online videos Ive gotten things moving, but now there is the task of matching up what the author has done with the outside tutorial and figuring out how to combine them to continue the rest of the book. The other issue i have found with the book is that this book tries to be too many things to the reader. In the introduction the author makes some statements about how this isn't a book on learning Java; yet there is a section on how two write your first Java program. Additionally, there are sections through out the book describing what code comments are, how to write a class, and other somewhat fundamental Java instructions. I wish the book focused more on the task at hand, web scraping, and less on how to write in Java.
3 of 6 people found the following review helpful.
It is very limited on teaching
By Amazon Customer
This book does a poor job of explaining the concepts on scrapping html. The book gives a few working programs that can be reused if you have a good understanding Java to start with.
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