alv*_*vas 1 html java xml parsing jsoup
如何过滤嵌套标签中的噪音？例如，我有这个输入：
[在：]
<html>
<source>
<noise>something something, many many things</noise>foo bar bar<noise>more something something noise</noise>baring foo
</source>
</html>
我需要得到这个输出：
[出去]
foo bar bar
baring foo
我试过这个，但我仍然从嵌套标签中得到噪音：
import java.io.*;
import java.util.List;
import org.apache.commons.io.IOUtils;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.parser.Parser;
public class HelloJsoup {
public static void main(String[] args) throws IOException {
String br = "<html><source><noise>something something, many many things</noise>foo bar bar<noise>more something something noise</noise>baring foo</source></html>";
Document doc = Jsoup.parse(br, "", Parser.xmlParser());
//System.out.println(doc);
for (Element sentence : doc.getElementsByTag("source"))
System.out.print(sentence.text());
}
}
[出去：]
something something, many many thingsfoo bar barmore something something noisebaring foo
通过首先删除噪声标签，您只剩下<source>foo bar barbaring foo</source>，但要实现您指定的输出，您只需遍历节点并将每个 TextNode 打印在新行上。例如：
String br = "<html><source><noise>something something, many many things</noise>foo bar bar<noise>more something something noise</noise>baring foo</source></html>";
Document doc = Jsoup.parse(br, "", Parser.xmlParser());
Element source = doc.select("source").first(); // select source element
Elements noise = doc.select("noise"); // Select noise elements
for (Element e : noise) { // loop through and remove each from doc
e.remove();
}
for (Node node : source.childNodes()) {
System.out.println(node); // print each remaining textnode on a new line
}
输出：
foo bar bar
baring foo
更新
我发现这是一种更简单的方法：
Element source = doc.select("source").first(); // select source element
for (TextNode node : source.textNodes()) {
System.out.println(node);
}
它遍历<source>元素直接拥有的 textNodes，并将每个文本节点打印到新行。输出为：
foo bar bar
baring foo