如何使用jsoup用span标签替换单词? [英] How to replace words with span tag using jsoup?
问题描述
假设我有以下html:
Assume I have the following html:
<html>
<head>
</head>
<body>
<div id="wrapper" >
<div class="s2">I am going <a title="some title" href="">by flying</a>
<p>mr tt</p>
</div>
</div>
</body>
</html>
文本节点中等于或大于4个字符的所有单词(例如单词"going")都将替换为原始html中的html内容(而非文本)<span>going<span>，而无需进行任何其他更改.
Any words in the text nodes that are equal to or greater than 4 characters for example the word 'going' is replaced with html content (not text) <span>going<span> in the original html without changing anything else.
如果我尝试执行诸如element.html(replacement)之类的问题，那么问题在于，如果让当前元素为<div class="s2">，那么它也会擦除<a title="some title"
If I try do something like element.html(replacement), the problem is if lets the current element is <div class="s2"> it will also wipe off <a title="some title"
推荐答案
In this case you must traverse your document as suggested by this answer. Here's a way of doing it using Jsoup APIs:
-
NodeTraversor和NodeVisitor允许您遍历DOM -
Node.replaceWith(...)允许替换DOM中的节点
NodeTraversorandNodeVisitorallow you to traverse the DOMNode.replaceWith(...)allows for replacing a node in the DOM
代码如下:
public class JsoupReplacer {
public static void main(String[] args) {
so6527876();
}
public static void so6527876() {
String html =
"<html>" +
"<head>" +
"</head>" +
"<body>" +
" <div id=\"wrapper\" >" +
" <div class=\"s2\">I am going <a title=\"some title\" href=\"\">by flying</a>" +
" <p>mr tt</p>" +
" </div> " +
" </div>" +
"</body> " +
"</html>";
Document doc = Jsoup.parse(html);
final List<TextNode> nodesToChange = new ArrayList<TextNode>();
NodeTraversor nd = new NodeTraversor(new NodeVisitor() {
@Override
public void tail(Node node, int depth) {
if (node instanceof TextNode) {
TextNode textNode = (TextNode) node;
String text = textNode.getWholeText();
String[] words = text.trim().split(" ");
for (String word : words) {
if (word.length() > 4) {
nodesToChange.add(textNode);
break;
}
}
}
}
@Override
public void head(Node node, int depth) {
}
});
nd.traverse(doc.body());
for (TextNode textNode : nodesToChange) {
Node newNode = buildElementForText(textNode);
textNode.replaceWith(newNode);
}
System.out.println("result: ");
System.out.println();
System.out.println(doc);
}
private static Node buildElementForText(TextNode textNode) {
String text = textNode.getWholeText();
String[] words = text.trim().split(" ");
Set<String> longWords = new HashSet<String>();
for (String word : words) {
if (word.length() > 4) {
longWords.add(word);
}
}
String newText = text;
for (String longWord : longWords) {
newText = newText.replaceAll(longWord,
"<span>" + longWord + "</span>");
}
return new DataNode(newText, textNode.baseUri());
}
}
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