如何使用Wicket上传截图/图片

public class UploadPage extends WebPage {
    private FileUploadField fileUploadField;

    public UploadPage() {
        Form<Void> form = new Form<>("uploadForm");
        add(form);

        fileUploadField = new FileUploadField("fileUpload");
        form.add(fileUploadField);

        form.add(new Button("submit") {
            @Override
            public void onSubmit() {
                FileUpload uploadedFile = fileUploadField.getFileUpload();
                if (uploadedFile != null) {
                    // 获取上传文件的文件名
                    String fileName = uploadedFile.getClientFileName();
                    
                    // 获取上传文件的内容
                    byte[] fileContent = uploadedFile.getBytes();
                    
                    // 进行文件处理操作，例如保存文件到服务器
                    // ...
                    
                    // 显示上传成功的消息
                    info("文件上传成功！");
                }
            }
        });
    }
}