How to filter noise in nested tags in JSoup? java
Question
How to filter noise in nested tags? For example, i have this input:
[in:]
<html>
<source>
<noise>something something, many many things</noise>foo bar bar<noise>more something something noise</noise>baring foo
</source>
</html>
and i need to get this output:
[out]
foo bar bar
baring foo
I have tried this but I am still getting the noise from the nested tags:
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());
}
}
[out:]
something something, many many thingsfoo bar barmore something something noisebaring foo
2 answers
solution1
4 ACCPTED 2014-02-10 14:00:13
By removing the noise tags first, you are left with <source>foo bar barbaring foo</source> , though to achieve the output you specified, you can just iterate through the nodes and print each TextNode on a new line. For example:
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
}
Outputs:
foo bar bar
baring foo
Update
I found this to be an even simpler method:
Element source = doc.select("source").first(); // select source element
for (TextNode node : source.textNodes()) {
System.out.println(node);
}
It iterates through the textNodes owned directly by the <source> element and prints each one to a new line. Ouput is:
foo bar bar
baring foo
solution2
0 2014-02-10 13:33:12
尝试：
System.out.println(sentence.ownText());
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