WebDriverException Cannot find firefox binary in PATH.的解决方法

最近在学习webdriver,顺便把遇到的问题记在这里，以便日后查阅，并分享给遇到相同问题的人。

问题：运行seleniumhq.org网站上的例子。

import org.openqa.selenium.By;  

import org.openqa.selenium.WebDriver;  

import org.openqa.selenium.WebElement;  

import org.openqa.selenium.firefox.FirefoxDriver;  

import org.openqa.selenium.support.ui.ExpectedCondition;  

import org.openqa.selenium.support.ui.WebDriverWait;  

  

public class Selenium2Example  {  

    public static void main(String[] args) {  

        // Create a new instance of the Firefox driver  

        // Notice that the remainder of the code relies on the interface,   

        // not the implementation.  

        WebDriver driver = new FirefoxDriver();  

  

        // And now use this to visit Google  

        driver.get("http://www.google.com");  

        // Alternatively the same thing can be done like this  

        // driver.navigate().to("http://www.google.com");  

  

        // Find the text input element by its name  

        WebElement element = driver.findElement(By.name("q"));  

  

        // Enter something to search for  

        element.sendKeys("Cheese!");  

  

        // Now submit the form. WebDriver will find the form for us from the element  

        element.submit();  

  

        // Check the title of the page  

        System.out.println("Page title is: " + driver.getTitle());  

          

        // Google's search is rendered dynamically with JavaScript.  

        // Wait for the page to load, timeout after 10 seconds  

        (new WebDriverWait(driver, 10)).until(new ExpectedCondition() {  

            public Boolean apply(WebDriver d) {  

                return d.getTitle().toLowerCase().startsWith("cheese!");  

            }  

        });  

  

        // Should see: "cheese! - Google Search"  

        System.out.println("Page title is: " + driver.getTitle());  

          

        //Close the browser  

        driver.quit();  

    }  

}  

报如下错误

Exception in thread "main"
org.openqa.selenium.WebDriverException: Cannot find firefox binary in PATH.
Make sure firefox is installed. OS appears to be: XP
Build info: version: '2.18.0', revision: '15704', time: '2012-01-27 17:37:17'
System info: os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1',
java.version: '1.6.0_23'

看这个报错应该是firefox安装路径不是默认路径。

解决方法：方法1、最简单的重新安装firefox到默认路径。

方法2、直接用System.setPropert方法设置webdriver.firefox.bin的值，如

System.setProperty("webdriver.firefox.bin","D:\\Program Files\\Mozilla Firefox\\firefox.exe");  

方法3、 用FirefoxBinary类和public FirefoxDriver(FirefoxBinary
binary, FirefoxProfile profile)这个构造方法，直接上代码

File pathToFirefoxBinary = new File("D:\\Program Files\\Mozilla Firefox\\firefox.exe");  

FirefoxBinary firefoxbin = new FirefoxBinary(pathToFirefoxBinary);  

WebDriver driver = new FirefoxDriver(firefoxbin,null);//这里使用这个构造方法。  

应该还可以在环境变量里面设置firefox的路径也可以，有兴趣的可以试一下。

注：有人可能会不知道webdriver.firefox.bin，可以看一下源码，其中

 org.openqa.selenium.firefox.internal.Executable.locateFirefoxBinaryFromSystemProperty()

方法第一句

String binaryName = System.getProperty("webdriver.firefox.bin");  

说明默认的时候取的就是这个值，重新设置一下。