java獲取異常信息，Selenium碰到的異常記錄

Java版本的Selenium異常記錄

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1. 沒有找到類的異常（NoClassDefFoundError）

異常如下：

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/base/Function

??? at com.yy.baidu.testBaidu.main(testBaidu.java:12)

Caused by: java.lang.ClassNotFoundException: com.google.common.base.Function

??? at java.net.URLClassLoader$1.run(Unknown Source)

??? at java.net.URLClassLoader$1.run(Unknown Source)

??? at java.security.AccessController.doPrivileged(Native Method)

??? at java.net.URLClassLoader.findClass(Unknown Source)

??? at java.lang.ClassLoader.loadClass(Unknown Source)

??? at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

??? at java.lang.ClassLoader.loadClass(Unknown Source)

??? ... 1 more

解決辦法：

此問題通常的包引入的少了，少Selenium包，如下圖，除了要引入selenium-java-2.52.0.jar包以外，還需要引入libs目錄下的包。

java獲取異常信息，

2. 沒有找到Firefox的路徑

異常如下：

Exception in thread "main" org.openqa.selenium.WebDriverException: Cannot find firefox binary in PATH. Make sure firefox is installed. OS appears to be: WIN8_1

Build info: version: '2.52.0', revision: '4c2593c', time: '2016-02-11 19:03:33'

System info: host: 'DESKTOP-VFHU33A', ip: '192.168.3.115', os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.7.0_79'

Driver info: driver.version: FirefoxDriver

??? at org.openqa.selenium.firefox.internal.Executable.<init>(Executable.java:74)

??? at org.openqa.selenium.firefox.FirefoxBinary.<init>(FirefoxBinary.java:60)

??? at org.openqa.selenium.firefox.FirefoxBinary.<init>(FirefoxBinary.java:56)

??? at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:120)

??? at com.yy.baidu.testBaidu.main(testBaidu.java:12)

解決辦法：

方法1. 重裝Firefox，這個問題最簡單的辦法就是重新按照Firefox，穩穩的

方法2. 用System.setPropert方法設置webdriver.firefox.bin的值，如：

public?class?testBaidu?{

??? public?static?void?main(String[] args){

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

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??????? System.out.println("srart selenium ");

??????? WebDriver driver =?new?FirefoxDriver();

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

??????? WebElement txtbox = driver.findElement(By.id("kw"));

??????? txtbox.sendKeys("selenium java");

??????? WebElement btn = driver.findElement(By.id("su"));

??????? btn.click();

??????? System.out.println("end selenium");

??? }

}

微信交易記錄怎么查？方法3. 用FirefoxBinary類和public FirefoxDriver(FirefoxBinary binary, FirefoxProfile profile)這個構造方法，直接上代碼:

public?class?testBaidu?{

??? public?static?void?main(String[] args){

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

??????? FirefoxBinary firefoxbin =?new?FirefoxBinary(pathToFirefoxBinary);

??????? WebDriver driver =?new?FirefoxDriver(firefoxbin,null);//這里使用這個構造方法。?

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??????? System.out.println("srart selenium ");

??????? WebDriver driver =?new?FirefoxDriver();

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

??????? WebElement txtbox = driver.findElement(By.id("kw"));

??????? txtbox.sendKeys("selenium java");

??????? WebElement btn = driver.findElement(By.id("su"));

??????? btn.click();

??????? System.out.println("end selenium");

??? }

}

注：有人可能會不知道webdriver.firefox.bin，可以看一下源碼，其中

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

方法第一句

??? String binaryName =?System.getProperty(FirefoxDriver.SystemProperty.BROWSER_BINARY);

說明默認的時候取的就是這個值，重新設置一下。

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最后附上查看Selenium源碼的方法

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shell腳本異常捕獲、1. 右鍵selenium引入的jar包“selenium-java-2.52.0.jar”選擇Properties

2. 點擊External location -> External File... -> 找到“selenium-java-2.52.0-srcs.jar”

設置好了之后，就可以查看Selenium的源碼了。