How to parse data in Talend with Java (coming from a previously produced .txt file)?

This is a problem related to Talend, in your code, use the complete method names including their packages. For your document parsing for example, you can use :

Document document =  org.jsoup.Jsoup.parse(new File("C:/Talend/workspace/WEBCRAWLER/output/keywords_SOA.txt"), "utf-8");