在附加功能价值方面需要进行的修改很少：

• 铬合金选项的密钥为chromeOptions
• 首选项也是需要使用密钥prefsMap的选项之一
• 尝试提供下载目录的绝对路径。

您的附加功能应如下所示(确保没有换行符)：

chrome.additional.capabilities={"chromeOptions":{"args":["--allow-
 outdated-plugins","--always-authorize-plugins","--headless --disable-
 gpu","-disable-extensions"],"prefs":
 {"profile.default_content_settings.popups":0,
 "download.default_directory":"/usr/workspace/testproject/downloads",
 "credentials_enable_service":false,
 "profile.password_manager_enabled":false}}}

参考chromeOptions-对象

**编辑：**根据驱动版本的不同，您可能需要在Chrome特定能力中添加goog前缀，例如：

chrome.additional.capabilities={"goog:chromeOptions":{"args":["start-maximized","--ignore-certificate-errors"]}}

下面的示例展示了如何在使用侦听器初始化驱动程序之前将功能附加到复杂对象。例如，为了使用Firefox配置文件，您可以使用qaf driver listener。

@Override
public void beforeInitialize(Capabilities desiredCapabilities) {
    FirefoxProfile profile= new FirefoxProfile();
    //create and set profile as per need
    profile.setPreference( "layout.css.devPixelsPerPx", "0.9" ); 
    ((DesiredCapabilities)desiredCapabilities).setCapability(FirefoxDriver.PROFILE, profile);

   //you also can provide existing profile name. AFAIK firefoxdriver supports existing profile name as well.
   //((DesiredCapabilities)desiredCapabilities).setCapability(FirefoxDriver.PROFILE, "my-profile"); 
}

@Override
    public void beforeInitialize(Capabilities desiredCapabilities) {
        ChromeOptions options = new ChromeOptions();
        //set options and merge to capabilites
        //options.addExtensions(paths);
        desiredCapabilities.merge(options);
    }

下面的设置放在应用程序的.properties文件中。
对于Chrome：

driver.name=chromeDriver
chrome.capabilities={"chromeOptions":{"args":["--allow-outdated-plugins","--always-authorize-plugins","--headless --disable-gpu","-disable-extensions"],"prefs":{"profile.default_content_settings.popups":0,"download.default_directory":"C:\\server","credentials_enable_service":false,"profile.password_manager_enabled":false}}}
webdriver.chrome.driver =C:/server/chromedriver.exe

下面的设置适用于我的IE11

driver.name=iExplorerdriver
system.webdriver.ie.driver = C:/server/IEDriverServer.exe
iexplorer.additional.capabilities={'ignoreProtectedModeSettings':true}
iexplorer.additional.capabilities={'nativeEvents':false}
iexplorer.additional.capabilities={'unexpectedAlertBehaviour':accept}
iexplorer.additional.capabilities={'enablePersistentHover':true}
iexplorer.additional.capabilities={'ignoreZoomSetting':true}
iexplorer.additional.capabilities={'requireWindowFocus':true}
iexplorer.additional.capabilities={"ignoreProtectedModeSettings":"true",'nativeEvents':false,'unexpectedAlertBehaviour':accept,'enablePersistentHover':true,'ignoreZoomSetting':true,'requireWindowFocus':true}
iexplorer.additional.capabilities={'ignoreProtectedModeSettings':true,'nativeEvents':false,'unexpectedAlertBehaviour':accept,'enablePersistentHover':true,'ignoreZoomSetting':true,'requireWindowFocus':true}

感谢@user861594回答这个问题。
我最近发现了一种更简单的方法，可以在BaseTestCase类本身中设置Chrome功能，而不是在Application.Properties中设置。
这就是我所做的，而且效果非常好！
声明您的文件路径=“xyz”；

String chromePrefs = "{'acceptSslCerts': true,'chromeOptions':   {'prefs': {'prompt_for_download': false,'download.default_directory': '"+filePath+"'}}}";
      ConfigurationManager.getBundle().setProperty("chrome.additional.capabilities", chromePrefs);

享受自动化！