正文提取算法

本身寫的一個正文提取算法，在三個網站上測試沒問題

須要使用第三方的jar jsoup

 

package com.extract;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

public class ExtractNovel {

	public static void main(String[] args) throws IOException {

		//dijiuzww.com
		String test = FileUtils
				.readFileToString(new File("C://Users//Administrator//Desktop//sina.com"));
//		String test = FileUtils
//				.readFileToString(new File("C://Users//Administrator//Desktop//testextaractContent.txt"));
//	
		Document doc = Jsoup.parse(test);
		doc = denoiseElementForDoc(doc);
		// System.out.println(doc.text());
		int size = doc.text().length();
		Element e = doc.getAllElements().get(0);
		Element target[] = new Element[1];
		check(e,size);
	
	}
	
	public static void check(Element e, float size) {

		Element son = findRealSon(e, size);
		System.out.println(son.toString());
		System.out.println(son.text());
	}
	
	
	public static Element findRealSon(Element e, float size) {
		Elements els = e.children();
		Element son = null;
		for (Element tempson : els) {
			float length = tempson.text().length();
			if (length / size > 0.75) {
				Element element = findRealSon(tempson, size);
				if(element ==null){
					son =  tempson;
					return son;
				}else{
					son = element;
				}
			}
		}
		return son;
		

		

	}
	
	public static Document denoiseElementForDoc(Document document) {
		document.getElementsByTag("script").remove();
		document.getElementsByTag("style").remove();
		document.getElementsByTag("select").remove();
		document.getElementsByTag("link").remove();
		document.getElementsByTag("input").remove();
		document.getElementsByTag("object").remove();
		document.getElementsByTag("textarea").remove();
		 
		document.getElementsByTag("ul").remove();
		document.getElementsByTag("img").remove();
		document.getElementsByTag("a").attr("href", "javascript:void(0)").remove();
		document.getElementsByAttributeValue("display", "none").remove();
		 
		document.getElementsByAttributeValueStarting("class", "foot").remove();
		document.getElementsByAttributeValue("class", "settings").remove();
		document.getElementsByAttributeValueContaining("style", "display:none").remove();
		document.getElementsByAttributeValueContaining("style", "overflow: hidden").remove();
		return document;
	}
}