[英]Jsoup extract group of selectors until reached designated selector
我有以下頁面:
<div>
<h3>...</h3>
<span>...</span>
<p>...</p>
<span...</span>
<span...</span>
<span...</span>
<p>...</p>
<span...</span>
<span...</span>
<hr />
<h3>...</h3>
<span>...</span>
<p>...</p>
<p>...</p>
<hr />
<h3>...</h3>
<span>...</span>
<span>...</span>
<p>...</p>
<p>...</p>
<hr />
</div>
如您所見,大多數選擇器都在同一級別內。 我試圖弄清楚如何使用Jsoup一次廢棄一個塊。 塊表示所有以<h3>
開始並以<hr>
結束的選擇器(在上面的示例中有3個塊)。 之間的選擇器不一致,並且數量可以變化。
我閱讀了官方的API文檔 ,但找不到正確的方法。
package stack;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
public class Stack {
public static void main(String args[]) throws Exception {
File input = new File("test.html");
Document doc = Jsoup.parse(input, "UTF-8");
List<Elements> blocks = new ArrayList<>();
Elements listofh3 = doc.getElementsByTag("h3");
for(Element h3 : listofh3) {
Elements block = new Elements();
block.add(h3);
Element cursor = h3;
while(!cursor.tagName().equals("hr")) {
cursor = cursor.nextElementSibling();
block.add(cursor);
}
blocks.add(block);
}
for(Elements block : blocks) {
System.out.println(block);
System.out.println("----------------------------");
}
}
}
另一個解決方案可能是這樣
package stack;
import java.io.File;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
public class Stack {
public static void main(String args[]) throws Exception {
File input = new File("test.html");
Document doc = Jsoup.parse(input, "UTF-8");
Elements listofh3 = doc.getElementsByTag("h3");
for(Element h3 : listofh3) {
Element span = doc.createElement("span");
span.addClass("block");
Element cursor = h3;
while(!cursor.tagName().equals("hr")) {
Element next = cursor.nextElementSibling();
span.appendChild(cursor);
cursor = next;
}
cursor.remove(); //remove hr
doc.body().appendChild(span);
}
System.out.println(doc);
}
}
測試輸入
<div>
<h3>header 1</h3>
<span>span 1</span>
<p>p 1</p>
<span>span 11</span>
<span>span 111</span>
<span>span 1111</span>
<p>p 11</p>
<span>span 11111</span>
<span>span 111111</span>
<hr />
<h3>header 2</h3>
<span>span 2</span>
<p>p 2</p>
<p>p 22</p>
<hr />
<h3>header 3</h3>
<span>span 3</span>
<span>span 33</span>
<p>p 3</p>
<p>p 33</p>
<hr />
</div>
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