Selenium运行时报错

1、运行时报错，提示

Exception in thread "main" java.lang.NoSuchFieldError: INSTANCE
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:144)
    at org.openqa.selenium.remote.internal.HttpClientFactory.getClientConnectionManager(HttpClientFactory.java:71)
    at org.openqa.selenium.remote.internal.HttpClientFactory.<init>(HttpClientFactory.java:57)
    at org.openqa.selenium.remote.internal.HttpClientFactory.<init>(HttpClientFactory.java:60)
    at org.openqa.selenium.remote.internal.ApacheHttpClient$Factory.getDefaultHttpClientFactory(ApacheHttpClient.java:251)
    at org.openqa.selenium.remote.internal.ApacheHttpClient$Factory.<init>(ApacheHttpClient.java:228)
    at org.openqa.selenium.remote.HttpCommandExecutor.getDefaultClientFactory(HttpCommandExecutor.java:89)
    at org.openqa.selenium.remote.HttpCommandExecutor.<init>(HttpCommandExecutor.java:63)
    at org.openqa.selenium.remote.HttpCommandExecutor.<init>(HttpCommandExecutor.java:58)
    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:95)
    at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:275)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:116)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:222)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:215)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:211)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:124)
    at com.selenium.homepage.HomePage.openBrowse(HomePage.java:44)
    at com.selenium.homepage.HomePage.login1(HomePage.java:58)
    at com.selenium.homepage.HomePage.main(HomePage.java:29)

原因：一般是由于导入的jar包重复

解决办法：去Build Path中将重复的jar包删除

 

2、运行时报错，提示

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:

*** LOG addons.manager: Application has been upgraded

*** LOG addons.xpi: startup

*** LOG addons.xpi: Skipping unavailable install location app-system-local

*** LOG addons.xpi: Skipping unavailable install location app-system-share

*** LOG addons.xpi: Ignoring file entry whose name is not a valid add-on ID:
 C:\Users\Salma.n\AppData\Local\Temp\anonymous38301webdriver-profile\extensions\webdriver-staging

*** LOG addons.xpi: checkForChanges

*** LOG addons.xpi-utils: Opening XPI database 
C:\Users\Salma.n\AppData\Local\Temp\anonymous38301webdriver-profile\extensions.json

*** LOG addons.xpi: New add-on fxdriver@googlecode.com installed in app-profile

*** Blocklist::_loadBlocklistFromFile: blocklist is disabled

*** LOG addons.xpi-utils: Make addon app-profile:fxdriver@googlecode.com visible

原因：Selenium和FireFox版本兼容性问题
解决办法：升级Selenium或降低FireFox版本

3、启动FireFox弹出导入向导

原因：未知
解决办法：
将firefox的profiles.ini所在文件中修改IsRelative=1->IsRelative=0
文件位置
C:\Users\{用户名}\AppData\Roaming\Mozilla\Firefox\profiles.ini