JavaでHTMLからテキストを取得するサンプル

HtmlParserCallback.java

package sample;

import javax.swing.text.MutableAttributeSet;
import javax.swing.text.html.HTML.Tag;
import javax.swing.text.html.HTMLEditorKit.ParserCallback;

public class HtmlParserCallback extends ParserCallback {
    private StringBuffer buffer;

    public HtmlParserCallback() {
        buffer = new StringBuffer();
    }

    public String getFormattedText() {
        return buffer.toString();
    }

    @Override
    public void handleText(char[] data, int pos) {
        buffer.append(data);
    }

    @Override
    public void handleStartTag(Tag t, MutableAttributeSet a, int pos) {
    }

    @Override
    public void handleEndTag(Tag t, int pos) {
    }

    @Override
    public void handleSimpleTag(Tag t, MutableAttributeSet a, int pos) {
        if (t.equals(Tag.BR)) {
            buffer.append("\n");
        }
    }
}

HtmlParseSample.java

package sample;

import javax.swing.text.html.parser.ParserDelegator;
import java.io.StringReader;

/**
 * JavaでHTMLからテキストを取得するサンプル
 *
 * @see http://docs.oracle.com/javase/jp/6/api/javax/swing/text/html/parser/ParserDelegator.html
 * @see http://docs.oracle.com/javase/jp/6/api/javax/swing/text/html/HTMLEditorKit.ParserCallback.html
 */
public class HtmlParseSample {
    public static void main(String[] args) {
        String html = "<div>"
                + "hoge<br>"
                + "   hoge"
                + "</div>"
                + "ほげほげ<br>"
                + "   fugafuga<br>"
                + "   <pre>"
                + "   hoge<br>"
                + "   fuga"
                + "</pre>"
                + "<script type=\"text/javascript\">"
                + "    alert('ALERT!');"
                + "</script>"
                + "<br/>"
                + "あばばばば";
        StringReader reader = new StringReader(html);
        ParserDelegator parserDelegator = new ParserDelegator();
        HtmlParserCallback callback = new HtmlParserCallback();
        try {
            parserDelegator.parse(reader, callback, true);
            System.out.println(callback.getFormattedText());
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}