JxBrowser提供允许处理所有文件下载的API。使用此API，您可以控制应下载哪些文件，提供必须保存文件的目标目录的路径以及跟踪下载进度。 您可以注册自己的DownloadHandler接口实现，以自己的方式处理文件下载。以下示例演示了如何执行此操作： ``` browser.setDownloadHandler(new DownloadHandler() { public boolean allowDownload(DownloadItem download) { download.addDownloadListener(new DownloadListener() { public void onDownloadUpdated(DownloadEvent event) { DownloadItem download = event.getDownloadItem(); if (download.isCompleted()) { System.out.println("Download is completed!"); } } }); System.out.println("Dest file: " + download.getDestinationFile().getAbsolutePath()); return true; } }); ``` 该DownloadItem 类提供了暂停和取消下载过程的方法。请参阅其相应的方法。 完整的示例演示了如何注册您自己的DownloadHandler实现，您可以在下面找到： ``` import com.teamdev.jxbrowser.chromium.Browser; import com.teamdev.jxbrowser.chromium.DownloadHandler; import com.teamdev.jxbrowser.chromium.DownloadItem; import com.teamdev.jxbrowser.chromium.events.DownloadEvent; import com.teamdev.jxbrowser.chromium.events.DownloadListener; import com.teamdev.jxbrowser.chromium.swing.BrowserView; import javax.swing.*; import java.awt.*; /** * The sample demonstrates how to handle file download. To cancel download * you must return {@code false} from the * {@link DownloadHandler#allowDownload(com.teamdev.jxbrowser.chromium.DownloadItem)} * method. To listed for download update events you can register your own * {@link com.teamdev.jxbrowser.chromium.events.DownloadListener}. */ public class DownloadSample { 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.setDownloadHandler(new DownloadHandler() { public boolean allowDownload(DownloadItem download) { download.addDownloadListener(new DownloadListener() { public void onDownloadUpdated(DownloadEvent event) { DownloadItem download = event.getDownloadItem(); if (download.isCompleted()) { System.out.println("Download is completed!"); } } }); System.out.println("Destination file: " + download.getDestinationFile().getAbsolutePath()); return true; } }); browser.loadURL("ftp://ftp.teamdev.com/updates/jxbrowser-4.0-beta.zip"); } } ```