JxBrowser API提供的功能允许在加载的网页上获取帧ID层次结构。 ``` import com.teamdev.jxbrowser.chromium.Browser; import com.teamdev.jxbrowser.chromium.events.FinishLoadingEvent; import com.teamdev.jxbrowser.chromium.events.LoadAdapter; import com.teamdev.jxbrowser.chromium.swing.BrowserView; import javax.swing.*; import java.awt.*; import java.util.List; /** * The sample demonstrates how to get a list of available frame IDs on * the loaded web page. Using frame ID parameter you can access document * frame to get its HTML, load specified URL in this frame or execute * JavaScript on it etc. In this sample we print HTML of each frame. */ public class GetFrameIDsSample { public static void main(String[] args) { Browser browser = new Browser(); BrowserView view = new BrowserView(browser); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.add(view, BorderLayout.CENTER); frame.setSize(800, 600); frame.setLocationRelativeTo(null); frame.setVisible(true); browser.addLoadListener(new LoadAdapter() { @Override public void onFinishLoadingFrame(FinishLoadingEvent event) { if (event.isMainFrame()) { printFramesHierarchy(event.getBrowser(), Browser.MAIN_FRAME_ID); } } }); browser.loadURL("http://docs.oracle.com/javase/8/docs/api/"); } public static void printFramesHierarchy(Browser browser, long parentFrameId) { List<Long> childFrameIds = browser.getFramesIds(parentFrameId); for (Long childFrameId : childFrameIds) { System.out.println("Child Frame: " + childFrameId + ", HTML: " + browser.getHTML(childFrameId)); printFramesHierarchy(browser, childFrameId); } } } ```