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//jsoup_1.7.2, groovy_2.3.7
import org.jsoup.Jsoup
import org.jsoup.nodes.Document
import org.jsoup.select.Elements
String html = "<html><body><IMG src='http://adfadf' /></body></html>"
Document doc = Jsoup.parse(html)
Elements elements=doc.select("img")
 //for (int i = 0; i < postElements.size(); i++) {
elements.each{
    println(it.attr("src"));
}
/*output:
http://adfadf
*/
																		