Extract CSS Styles from HTML using JSOUP in JAVA

java, jsoup

Solution

If the style is embedded in your Element you just have to use `.attr("style")`.

JSoup is not a Html renderer, it is just a HTML parser, so you will have to parse the content from the retrieved `<style>` tag html content. You can use a simple regex for this; but it won't work in all cases. You may want to use a CSS parser for this task.

public class Test {
    public static void main(String[] args) throws Exception {
        String html = "<HTML>\n" +
                "<HEAD>\n"+
                "<TITLE>Page 1</TITLE>\n"+
                "<META http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n"+
                "<DIV style=\"position:relative;width:931;height:1243;\">\n"+
                "<STYLE type=\"text/css\">\n"+
                "<!--\n"+
                "    .ft00{font-size:11px;font-family:Times;color:#ffffff;}\n"+
                "    .ft01{font-size:11px;font-family:Times;color:#ffffff;}\n"+
                "-->\n"+
                "</STYLE>\n"+
                "</HEAD>\n"+
                "</HTML>";

        Document doc = Jsoup.parse(html);
        Element style = doc.select("style").first();
        Matcher cssMatcher = Pattern.compile("[.](\\w+)\\s*[{]([^}]+)[}]").matcher(style.html());
        while (cssMatcher.find()) {
            System.out.println("Style `" + cssMatcher.group(1) + "`: " + cssMatcher.group(2));
        }
    }
}

Will output:

Style `ft00`: font-size:11px;font-family:Times;color:#ffffff;
Style `ft01`: font-size:11px;font-family:Times;color:#ffffff;

Problem

Can anyone help with extraction of CSS styles from HTML using Jsoup in Java. For e.g in below html i want to extract .ft00 and .ft01 ``` <HTML> <HEAD> <TITLE>Page 1</TITLE> <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> <DIV style="position:relative;width:931;height:1243;"> <STYLE type="text/css"> <!-- .ft00{font-size:11px;font-family:Times;color:#ffffff;} .ft01{font-size:11px;font-family:Times;color:#ffffff;} --> </STYLE> </HEAD> </HTML> ```

Original source