如何使用jsoup编辑html标记中的所有文本值
[英]how to edit all text values in html tags using jsoup
问题描述
What I want: I am new to Jsoup . 
我想要的是：我是Jsoup 。 I want to parse my html string and search for each text value that appears inside tags (any tag). 我想解析我的html字符串并搜索出现在标签（任何标签）内的每个文本值。 And then change that text value to something else. 然后将该文本值更改为其他值。
What I have done: I am able to change the text value for single tag. 我已经完成的工作：我可以更改单个标签的文本值。 Below is the code: 下面是代码：
public static void main(String[] args) {
String html = "<div><p>Test Data</p> <p>HELLO World</p></div>";
Document doc1=Jsoup.parse(html);
Elements ps = doc1.getElementsByTag("p");
for (Element p : ps) {
String pText = p.text();
p.text(base64_Dummy(pText));
}
System.out.println("======================");
String changedHTML=doc1.html();
System.out.println(changedHTML);
}
public static String base64_Dummy(String abc){
return "This is changed text";
}
output: 输出：
======================
<html>
<head></head>
<body>
<div>
<p>This is changed text</p>
<p>This is changed text</p>
</div>
</body>
</html>
Above code is able to change the p tag's value. 上面的代码能够更改p标签的值。 But, in my case html string can contain any tag; 但是，就我而言， html字符串可以包含任何标签； whose value I want to search and change. 我想搜索和更改其值。 How can I search all tags in html string and change their text value one by one. 如何搜索html字符串中的所有标签，并一一更改其文本值。
2 个解决方案
解决方案1
2 已采纳 2016-03-04 09:23:32
You can try with something similar to this code: 您可以尝试使用类似于以下代码的内容：
String html = "<html><body><div><p>Test Data</p> <div> <p>HELLO World</p></div></div> other text</body></html>";
Document doc = Jsoup.parse(html);
List<Node> children = doc.childNodes();
// We will search nodes in a breadth-first way
Queue<Node> nodes = new ArrayDeque<>();
nodes.addAll(doc.childNodes());
while (!nodes.isEmpty()) {
Node n = nodes.remove();
if (n instanceof TextNode && ((TextNode) n).text().trim().length() > 0) {
// Do whatever you want with n.
// Here we just print its text...
System.out.println(n.parent().nodeName()+" contains text: "+((TextNode) n).text().trim());
} else {
nodes.addAll(n.childNodes());
}
}
And you'll get the following output: 您将获得以下输出：
body contains text: other text
p contains text: Test Data
p contains text: HELLO World
解决方案2
2 2016-03-04 14:13:13
You want to use the CSS selector * and the method textNodes to get the text of a given tag ( Element in Jsoup world). 您想使用CSS选择器*和方法textNodes来获取给定标签的文本（Jsoup世界中的Element ）。
This line below 这条线下面
Elements ps = doc1.getElementsByTag("p");
becomes 变成
Elements ps = doc1.select("*");
Now, with this new selector you'll be able to select any elements (tags) within your HTML code. 现在，使用这个新的选择器，您将可以选择HTML代码中的任何元素（标签）。
FULL CODE EXAMPLE 全代码示例
public static void main(String[] args) {
System.out.println("Setup proxy...");
JSoup.setupProxy();
String html = "<html><body><div><p>Test Data</p> <div> <p>HELLO World</p></div></div> other text</body></html>";
Document doc1 = Jsoup.parse(html);
Elements tags = doc1.select("*");
for (Element tag : tags) {
for (TextNode tn : tag.textNodes()) {
String tagText = tn.text().trim();
if (tagText.length() > 0) {
tn.text(base64_Dummy(tagText));
}
}
}
System.out.println("======================");
String changedHTML = doc1.html();
System.out.println(changedHTML);
}
public static String base64_Dummy(String abc) {
return "This is changed text";
}
OUTPUT 输出值
======================
<html>
<head></head>
<body>
<div>
<p>This is changed text</p>
<div>
<p>This is changed text</p>
</div>
</div>This is changed text
</body>
</html>
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