Question

请使用jsoup

帮助从Blogger等博客中提取评论

能够获得标题但是如何提取人们发布的关于某个讨论主题的所有评论

package com.hascode.samples.jsoup;

import java.io.IOException;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

public class WebScraper {
 public static void main(final String[] args) throws IOException {
 Document doc = Jsoup.connect("http://www.hascode.com/")
 .userAgent("Mozilla").timeout(6000).get();
 String title = doc.title(); // parsing the page's title
 System.out.println("The title of www.hascode.com is: " + title);
 Elements heading = doc.select("h2 > a"); // parsing the latest article's
 // heading
 System.out.println("The latest article is: " + heading.text());
 System.out.println("The article's URL is: " + heading.attr("href"));
 Elements editorial = doc.select("div.BlockContent-body small");
 System.out.println("The was created: " + editorial.text());
 }
}

我正在尝试使用Jframe提取注释，但没有输出。这是我的代码：

public class SimpleWebCrawler extends JFrame {

    JTextField yourInputField = new JTextField(20);
    static JTextArea _resultArea = new JTextArea(100, 100);
    JScrollPane scrollingArea = new JScrollPane(_resultArea);
    private final static String newline = "\n";

    public SimpleWebCrawler() throws MalformedURLException {

        _resultArea.setEditable(false);
        System.out.println("Please enter the website  :");
        Scanner scan2 = new Scanner(System.in);
        String word2 = scan2.nextLine();

        try {
            URL my_url = new URL("http://" + word2 + "/");
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    my_url.openStream()));
            String strTemp = "";
            while (null != (strTemp = br.readLine())) {
                _resultArea.append(strTemp + newline);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        _resultArea.append("\n");
        _resultArea.append("\n");
        _resultArea.append("\n");


        String url = "http://" + word2 + "/";
        print("Fetching %s...", url);

        try{
        Document articlePage = Jsoup.connect(url).get();
        Elements comments = articlePage.select(".comments .comment-body");


        System.out.println("\n");

        BufferedWriter bw = new BufferedWriter(new FileWriter("C:\\Users\\user\\fypworkspace\\FYP\\Link\\abc.txt"));
        _resultArea.append("\n");
        for (Element comment : comments) {
            print("  %s  ",  comment.text());

            bw.write(comment.text());
            bw.write(System.getProperty("line.separator"));
        }
        bw.flush();
        bw.close();
        } catch (IOException e1) {

        }
        JPanel content = new JPanel();
        content.setLayout(new BorderLayout());
        content.add(scrollingArea, BorderLayout.CENTER);

        this.setContentPane(content);
        this.setTitle("Crawled Links");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        this.pack();


        }

        private static void print(String msg, Object... args) {

            _resultArea.append(String.format(msg, args) +newline);
        }

        private static String trim(String s, int width) {
            if (s.length() > width)
                return s.substring(0, width - 1) + ".";
            else
                return s;
        }

        //.. Get the content pane, set layout, add to center


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

        JFrame win = new SimpleWebCrawler();
        win.setVisible(true);

    }
}

Answer 1

只需打开文章页面并从那里抓取评论。每条评论都是<li>中<ul>个commentsList元素，其中Document articlePage = Jsoup.connect(heading.attr("href")).get(); Elements comments = articlePage.select(".commentsList li"); for (Element comment : comments) { System.out.println("Comment: " + comment.text()); }类，所以你可以这样做：

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使用jsoup从博客中提取评论

1 个答案: