selenium如何分别启动IE、firefox、chrome浏览器

    /*
     * 初始化火狐浏览器
     * */
    public static WebDriver initFireFox(WebDriver dr) {
        
        
        String key = "webdriver.firefox.bin";
        String value = "C:/Program Files (x86)/Mozilla Firefox/firefox.exe";
        System.setProperty(key, value);
        dr = new FirefoxDriver();
        dr.manage().window().maximize();
        dr.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
          
        return dr;        
        
    }

    /*
     * 初始化IE浏览器
     * */
    public static WebDriver initIE(WebDriver dr) {
        
        String key = "webdriver.ie.driver";
        String value = "./other/IEDriverServer.exe";
        System.setProperty(key, value);
        dr = new InternetExplorerDriver();
        dr.manage().window().maximize();
        dr.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        
        return dr;
        
    }

    /*
     * 初始化谷歌浏览器
     * */
    public static WebDriver initChrome(WebDriver dr) {
        
        String key = "webdriver.chrome.driver";
        String value = "./other/chromedriver.exe";
        System.setProperty(key, value);
        dr = new ChromeDriver();
        dr.manage().window().maximize();
        dr.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        
        return dr;
        
    }