Firefox下载自动保存

   profile.setPreference("browser.download.folderList",2);
        profile.setPreference("browser.download.dir", "C:\\selenium");
        profile.setPreference("browser.download.manager.showWhenStarting",false);
        profile.setPreference("browser.helperApps.neverAsk.saveToDisk", "exe/zip");  
        WebDriver driver=new FirefoxDriver(profile);
        driver = new FirefoxDriver(profile);
        driver.get("http://www.baidu.com");