get div by class containing TWO whitespaces in a row (JSoup)

Question

i'm trying to get a specific div by it's class. The class actually contains multiple classes seperated with spaces, but: the last class is seperated by to spaces!

Ex: class=test[SPACE]test[SPACE]test[SPACE][SPACE]test

full:

listing[SPACE]category_templates[SPACE]clearfix[SPACE]shelfListing[SPACE][SPACE]multiSaveListing

Now how did i go on about doing that?

Did not work (No Error thrown):

Elements divItemContainer = doc.select("div[class=listing category_templates clearfix shelfListing  multiSaveListing]");
            for (Element div : divItemContainer) {
                Toast.makeText(ApplicationContextProvider.getContext(), "Got Div: ", Toast.LENGTH_SHORT).show();
            }

Did not work (Thrown Error: String cannot contain whitespaces):

Elements divItemContainer = doc.select("div.listing.category_templates.clearfix.shelfListing..multiSaveListing");
            for (Element div : divItemContainer) {
                Toast.makeText(ApplicationContextProvider.getContext(), "Got Div: ", Toast.LENGTH_SHORT).show();
            }

Did not work (No Error):

Elements divItemContainer = doc.select("div.listing.category_templates.clearfix.shelfListing.multiSaveListing");
            for (Element div : divItemContainer) {
                Toast.makeText(ApplicationContextProvider.getContext(), "Got Div: ", Toast.LENGTH_SHORT).show();
            }

PS: The Toast is meant to purposly crash the App! It does nothing but kill and that's supposed to happen (at least at the moment)

Source:


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Alkis Kalogeris · Accepted Answer

This works, but it is unsafe and no reason to use it. Moreover in order for this to work you the order of the classes and the whitespaces must be identical. You say it doesn't, but I've tested it and it does.

Elements divItemContainer = doc.select("div[class=listing category_templates clearfix shelfListing  multiSaveListing]");
for (Element div : divItemContainer) {
    Toast.makeText(ApplicationContextProvider.getContext(), "Got Div: ", Toast.LENGTH_SHORT).show();
}

This is the way to do it. The order of the classes doesn't matter, nor the whitespaces. You say it doesn't work, but I've tested it and it does.

Elements divItemContainer = doc.select("div.listing.category_templates.clearfix.shelfListing.multiSaveListing");
for (Element div : divItemContainer) {
    Toast.makeText(ApplicationContextProvider.getContext(), "Got Div: ", Toast.LENGTH_SHORT).show();
}

For this one the error is correct.

Elements divItemContainer = doc.select("div.listing.category_templates.clearfix.shelfListing..multiSaveListing");
for (Element div : divItemContainer) {
    Toast.makeText(ApplicationContextProvider.getContext(), "Got Div: ", Toast.LENGTH_SHORT).show();
}

You query goes through a validation before executed. The validation that takes place takes as a parameter every class you input. The css selector you type gets split for every . and by typing consecutive . you are creating empty classes.

public static void notEmpty(String string) {
    if ((string == null) || (string.length() == 0))
        throw new IllegalArgumentException("String must not be empty");
}

The reason it doesn't work is not your selector. Try typing the response you get from the server. When you don Document doc = Jsoup.parse()... try printing the doc. Does this contain the element you are searching for? I'm suspecting it doesn't.

If I'm right in that the element you are searching for is not present in the response you are getting, then you have two possibilities.

The server perceives your program as a bot and doesn't allow that or it serves you a page for mobiles, so it serves you something else from what you are seeing when navigating through the browser. If this is the case then the solution is to set a userAgent
The element is not present because it is generated by javascript. Jsoup is just a parser, not a browser. It cannot execute javascript, thus it cannot generate the dynamic content. In order to check if the content you need is dynamic, just navigate to the page and press Ctrl + U and check if the element you need is in there. That's the content before any javascript is executed.

get div by class containing TWO whitespaces in a row (JSoup)

Answers (1)

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