jsoup标签提取问题 [英] jsoup tag extraction problem

问题描述

 Elements size = doc.select("div:contains(test:)");

我如何从这个html标记中提取值example和example1 ....使用jsoup ..

how can i extract the value example and example1 from this html tag....using jsoup..

推荐答案

由于此HTML的语义不足以实现您的最终目的(<br>不能有子级，而:不是HTML)，因此可以'使用诸如Jsoup之类的HTML解析器不能做很多事情. HTML解析器无意执行特定的 text 提取/标记化工作.

Since this HTML is not semantic enough for the final purpose you have (a <br> cannot have children and : is not HTML), you can't do much with a HTML parser like Jsoup. A HTML parser isn't intented to do the job of specific text extraction/tokenizing.

最好的办法是使用Jsoup获取<div>的HTML内容，然后使用常规的java.lang.String或java.util.Scanner方法进一步提取该内容.

Best what you can do is to get the HTML content of the <div> using Jsoup and then extract that further using the usual java.lang.String or maybe java.util.Scanner methods.

这是一个开球示例:

String html = "<div style=\"height:240px;\"><br>test: example<br>test1:example1</div>";
Document document = Jsoup.parse(html);
Element div = document.select("div[style=height:240px;]").first();

String[] parts = div.html().split("<br />"); // Jsoup transforms <br> to <br />.
for (String part : parts) {
    int colon = part.indexOf(':');
    if (colon > -1) {
        System.out.println(part.substring(colon + 1).trim());
    }
}

这导致

example
example1

---

如果我是HTML作者，则应该使用定义列表.例如

---

If I was the HTML author, I would have used a definition list for this. E.g.

<dl id="mydl">
     <dt>test:</dt><dd>example</dd>
     <dt>test1:</dt><dd>example1</dd>
</dl>

这更具语义，因此更容易解析:

This is more semantic and thus more easy parseable:

String html = "<dl id=\"mydl\"><dt>test:</dt><dd>example</dd><dt>test1:</dt><dd>example1</dd></dl>";
Document document = Jsoup.parse(html);
Elements dts = document.select("#mydl dd");
for (Element dt : dts) {
    System.out.println(dt.text());
}

这篇关于jsoup标签提取问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！