Jsoup-获取仅具有指定属性及其值的HTML标记 [英] Jsoup - getting a HTML tag with ONLY the specified attributes and its values

问题描述

我想使用jsoup从仅具有 一些特定属性和值的页面中提取元素.我已经经历了以下提到的方法，但没有一个能很好地解决我的目的:

I want to use jsoup to extract elements from a page that have only some specific attributes and values. I have gone through the below mentioned methods and none solved my purpose well:

1. Jsoup的getElementsByAttributesMatching

选择查询的这种格式:

doc.select("table[width=100%]").select("table[cellpadding=0]").select("table[cellspacing=0]");

这也是:

This one too:

doc.select("table[width=100%][cellpadding=0][cellspacing=0]");

当我使用这些方法时，我得到的元素具有我提到的属性以及其他属性.我想要的是仅具有指定属性的元素.

When I use these methods I am getting elements which have the attributes I have mentioned plus other attributes too. What I want are the elements with ONLY the specified attributes.

有没有办法解决这个问题?

Is there a way to get pass this huddle?

推荐答案

您的选择器已经为那些 3 属性选择了具有特定值的元素.因此，该元素至少具有3个属性.但是，如果它完全具有 3个属性，则这些属性就是您指定的属性.

Your selector already select element having a specific value for those 3 attributes. So the element has at least 3 attributes. But if it has exactly 3 attributes, then those are the ones you specified.

for (Element el: doc.select("table[width=100%][cellpadding=0][cellspacing=0]"))
    if (el.attributes().size() == 3)
        // Do something

---

示例

Document doc = Jsoup.parse(
    "<table width=100% cellpadding=0 cellspacing=0>OK</table>" +
    "<table width=100% cellpadding=0 cellspacing=0 height=100%>NO</table>");

for (Element el: doc.select("table[width=100%][cellpadding=0][cellspacing=0]"))
    if (el.attributes().size() == 3)
        System.out.println(el.text());

输出

OK

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