我想从那里的两个h2
标签中获取所有这些链接的名称
<h2><span class="mw-headline" id="People">People</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Bush&action=edit&section=1" title="Edit section: People">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<ul>
<li><a href="/wiki/George_H._W._Bush" title="George H. W. Bush">George H. W. Bush</a> (born 1924), the 41st president of the United States of America</li>
<li><a href="/wiki/George_W._Bush" title="George W. Bush">George W. Bush</a> (born 1946), the 43rd president of the United States of America</li>
<li><a href="/wiki/Jeb_Bush" title="Jeb Bush">Jeb Bush</a> (born 1953), the former governor of Florida and also a member of the Bush family</li>
<li><a href="/wiki/Bush_family" title="Bush family">Bush family</a>, the political family that includes both presidents</li>
<li><a href="/wiki/Bush_(surname)" title="Bush (surname)">Bush (surname)</a>, a surname (including a list of people with the name) </li>
</ul>
<h2><span class="mw-headline" id="Places.2C_United_States">Places, United States</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Bush&action=edit&section=2" title="Edit section: Places, United States">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
这两个
Elements h2next = docx.select("span.mw-headline#People");
do
{
ul = h2next.select("ul").first();
System.out.println(ul.text());
}
while (h2next!=null && ul==null);
也不是
//String content = docx.getElementById("People").outerHtml();
作品。
似乎this guy,有正确的想法,但我不能让它适应我的情况。
也许我应该使用正则表达式?
似乎维基百科html有点&#34;非结构化&#34;而且难以合作。
从the wikipedia disambiguation page我想抓住不同的感官,其中Bush
(或我考虑的任何模棱两可的名字)都可以用作一个人。
我已经尝试过各种方法来使用jsoup来获取这些数据,但我还没弄清楚。
我试过了:
Document docx = Jsoup.connect("https://en.wikipedia.org/wiki/Bush").get();
Element contentDiv = docx.select("span#mw-headlinePeople").first();
String printMe = contentDiv.toString(); // The result
因为我注意到我想要的数据存在于名为:
的分区中 <h2><span class="mw-headline" id="People">
但是输出没什么。
我根据之前的问题尝试了一些变体:
.select("span#mw-headlinePeople");
但仍然没有。
如何获取该信息?
理想情况下,我喜欢的是这样的:
George H. W. Bush
George W. Bush
Jeb Bush
虽然我知道我可能最初也必须得到Bush family
和Bush (surname)
,因为他们是该细分受众群的一部分,但我想我可以稍后删除它们。
此外,使用它更快:
Document docx = Jsoup.connect("https://en.wikipedia.org/wiki/Bush").get();
或者这个:
URL site_two = new URL("https://en.wikipedia.org/wiki/Bush");
URLConnection ycb = site_two.openConnection();
BufferedReader inb = new BufferedReader(
new InputStreamReader(
ycb.getInputStream()));
StringBuilder sb = new StringBuilder();
while ((inputLine = inb.readLine()) != null)
{
//get the disambig
//System.out.println(inputLine);
sb.append(inputLine);
sb.append(System.lineSeparator());
inputLine = inb.readLine();
}
我尝试使用this site,但事实证明它不是很有用。有人应该像所有这些正则表达式网站一样建立一个jsoup网站。
答案 0 :(得分:3)
一种可能的方法是同时选择所有标题(span.mw-headlines
)和所有链接(我找到的最佳选择器为li > a
)。
如果您通过将一个选择器与,
组合在一起来选择两个选择器,则它们将按照它们在页面上显示的顺序排列。因此,您可以在循环搜索结果时跟踪您是否处于“人员”部分:
Elements elements = docx.select("span.mw-headline, li > a");
boolean inPeopleSection = false;
for (Element elem : elements) {
if (elem.className().equals("mw-headline")) {
// It's a headline
inPeopleSection = elem.id().equals("People");
} else {
// It's a link
if (inPeopleSection) {
System.out.println(elem.text());
}
}
}
输出:
George H. W. Bush
George W. Bush
Jeb Bush
Bush family
Bush (surname)
关于性能,我认为它没有任何区别,只需使用更简单的版本(虽然我的Jsoup经验非常有限,所以不要相信我的话)。
答案 1 :(得分:1)
一个简单的选择器是h2:contains(people) + ul a
,例如:
Elements els = doc.select("h2:contains(people) + ul a");
这给出了以下要素:
0 <a href="/wiki/George_H._W._Bush" title="George H. W. Bush">
George H. W. Bush
1 <a href="/wiki/George_W._Bush" title="George W. Bush">
George W. Bush
2 <a href="/wiki/Jeb_Bush" title="Jeb Bush">
Jeb Bush
3 <a href="/wiki/Bush_family" title="Bush family">
Bush family
4 <a href="/wiki/Bush_(surname)" title="Bush (surname)">
Bush (surname)
我使用了try.jsoup.org(请参阅working example)和selector syntax guide作为资源。