Screen Scraping Library for Java

🌏 Scrape the world!

Install

• maven

Usage

This library screen-scrapes data from html and injects data into POJO using annotation.

    @WebScraper(url = "http://foo.com/bar.html")
    public class Baz {
        @Target(value = "//TABLE//TR/TD[2]/DIV/text()")
        String artist;
        @Target(value = "//TABLE//TR/TD[4]/A/text()")
        String title;
        @Target(value = "//TABLE//TR/TD[4]/A/@href")
        String url;
    }
    
    :
    
    List<Baz> bazs = WebScraper.Util.scrape(Baz.class);

Details

• InputHandler ... apply any processing before parsing

• Parser

  • XPathParser ... default
  • HtmlXPathParser ... for original purpose
  • SaxonXPathParser ... for huge xml file
  • JsonPathParser ... for json return

• Parser#foreach() ... like java collection stream

Sample

• Scraping composers from JASRAC database for iTuens
• Scraping json for deep learning proof reading
• Amazon purchase history
• Amazon yourstore collection
• Google suggest
• Yahoo! Japan proof reading

References

• https://www2.jasrac.or.jp/eJwid/

TODO

• Tidy version
• deleted garbled text
• InputHandler w/o cache
• argument injection into WebScraper#url

      @WebScraper(url = "http://foo.com?bar={bar}")
      public static class Result {
          :
  
      List<Result> data = WebScraper.Util.scrape(Result.class, @UrlParam(bar) args[0]);
  

• json parser
• css selector
  • https://github.com/jhy/jsoup -> serdes
• integrate serdes
• @WebScraper#encoding()
• @Target add exception handler or second, third option
• xml2xpath