Getting rid of html attributes and its values while parsing using jsoup
Question
I am trying to parse multiple html documents in such a way that I get only the tags discarding all its attributes and values. Can someone help me please.
For example: <img src="pic_trulli.jpg" alt="Italian Trulli">
changes to
<img>
Similarly, I want this to work for all the tags in an HTML document.
3 answers
solution1
1 2019-04-29 17:26:18
To remove the attributes of a single element you can use this:
element.attributes().asList()
.stream().map(Attribute::getKey)
.forEach(element::removeAttr);
To remove the attributes of all elements you can use this in combination with document.getAllElements() :
Document document = Jsoup.parse("<img src=\"pic_trulli.jpg\" alt=\"Italian Trulli\">");
document.getAllElements()
.forEach(e -> e.attributes().asList()
.stream().map(Attribute::getKey)
.forEach(e::removeAttr));
The result will be this:
<html>
<head></head>
<body>
<img>
</body>
</html>
solution2
0 2019-04-29 17:22:52
You can iterate over all elements from document and then over each element's attributes which should allow you to remove them.
Demo:
String html = "<img src=\"pic_trulli.jpg\" alt=\"Italian Trulli\">" +
"<div class=\"foo\"><a href=\"pic_trulli.jpg\" alt=\"Italian Trulli\" non-standard></div>";
Document doc = Jsoup.parse(html);
System.out.println(doc);
for (Element el : doc.getAllElements()){
for (Attribute atr : el.attributes().asList()){
el.removeAttr(atr.getKey());
}
}
System.out.println("-----");
System.out.println(doc);
Output:
<html>
<head></head>
<body>
<img src="pic_trulli.jpg" alt="Italian Trulli">
<div class="foo">
<a href="pic_trulli.jpg" alt="Italian Trulli" non-standard></a>
</div>
</body>
</html>
-----
<html>
<head></head>
<body>
<img>
<div>
<a></a>
</div>
</body>
</html>
solution3
0 2019-04-29 19:21:37
If your aim is to receive a clear document structure, you need to remove text and data nodes as well. Consider the following snippet.
Document document = Jsoup.connect("http://example.com").get();
document.getAllElements().forEach(element -> {
element.attributes().asList().forEach(attr -> element.removeAttr(attr.getKey()));
element.textNodes().forEach(Node::remove);
element.dataNodes().forEach(Node::remove);
});
System.out.println(document);
Output:
<!doctype html>
<html>
<head>
<title></title>
<meta>
<meta>
<meta>
<style></style>
</head>
<body>
<div>
<h1></h1>
<p></p>
<p><a></a></p>
</div>
</body>
</html>
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