Java HTML Parse Jsoup truncateHTML(String content, int len)

Description

truncate HTML

License

Apache License

Declaration

public static String truncateHTML(String content, int len)

Method Source Code


//package com.java2s;
//License from project: Apache License 

import org.jsoup.Jsoup;
import org.jsoup.nodes.*;
import org.jsoup.parser.Tag;
import java.util.List;

public class Main {

    public static String truncateHTML(String content, int len) {
        Document dirtyDocument = Jsoup.parse(content);
        Element source = dirtyDocument.body();
        Document clean = Document.createShell(dirtyDocument.baseUri());
        Element dest = clean.body();
        truncateHTML(source, dest, len);
        return dest.outerHtml().replace("<body>", "").replace("</body>", "");
    }/*from   w  w w  .ja v  a2s .c  o  m*/

    private static void truncateHTML(Element source, Element dest, int len) {
        List<Node> sourceChildren = source.childNodes();
        for (Node sourceChild : sourceChildren) {
            if (sourceChild instanceof Element) {
                Element sourceEl = (Element) sourceChild;
                Element destChild = createSafeElement(sourceEl);
                int txt = dest.text().length();
                if (txt >= len) {
                    break;
                } else {
                    len = len - txt;
                }
                dest.appendChild(destChild);
                truncateHTML(sourceEl, destChild, len);
            } else if (sourceChild instanceof TextNode) {
                int destLeng = dest.text().length();
                if (destLeng >= len) {
                    break;
                }
                TextNode sourceText = (TextNode) sourceChild;
                int txtLeng = sourceText.getWholeText().length();
                if ((destLeng + txtLeng) > len) {
                    int tmp = len - destLeng;
                    String txt = sourceText.getWholeText().substring(0, tmp) + "...";
                    TextNode destText = new TextNode(txt, sourceChild.baseUri());
                    dest.appendChild(destText);
                    break;
                } else {
                    TextNode destText = new TextNode(sourceText.getWholeText(), sourceChild.baseUri());
                    dest.appendChild(destText);
                }
            }
        }
    }

    private static Element createSafeElement(Element sourceEl) {
        String sourceTag = sourceEl.tagName();
        Attributes destAttrs = new Attributes();
        Element dest = new Element(Tag.valueOf(sourceTag), sourceEl.baseUri(), destAttrs);
        Attributes sourceAttrs = sourceEl.attributes();
        for (Attribute sourceAttr : sourceAttrs) {
            destAttrs.put(sourceAttr);
        }
        return dest;
    }
}

Java HTML Parse Jsoup truncateHTML(String content, int len)

Description

License

Declaration

Method Source Code

Related