使用java而不是javascript，在默认浏览器的同一选项卡中打开URL

import java.awt.Desktop;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

public class OpenURLInBrowser {
    public static void main(String[] args) {
        String url = "https://www.example.com";
        openURL(url);
    }

    public static void openURL(String url) {
        if (Desktop.isDesktopSupported()) {
            Desktop desktop = Desktop.getDesktop();
            if (desktop.isSupported(Desktop.Action.BROWSE)) {
                try {
                    URI uri = new URI(url);
                    desktop.browse(uri);
                } catch (IOException | URISyntaxException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}