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我從Selenium Downloads page下載了selenium-java-2.0b3.zip。我將它解壓縮並將所有.jars添加到簡單Eclipse項目的構建路徑中：Selenium（XercesImpl）和Google App Engine的故障
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
public class Main {
public static void main(String[] args) {
WebDriver driver = new HtmlUnitDriver();
driver.get("http://www.google.com");
System.out.println(driver.getPageSource());
}
}
這可以正常工作。然後我嘗試將所有庫添加到GWT/GAE項目的構建路徑中。如果不加引用庫，我看到這些錯誤，當我嘗試運行項目中的任何代碼：
Initializing AppEngine server
Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
Successfully processed foo\war\WEB-INF/appengine-web.xml
Successfully processed foo\war\WEB-INF/web.xml
[WARN] failed [email protected]160e{/,foo\war}: javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
[WARN] failed [email protected]: javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
[WARN] Error starting handlers
javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
at javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source)
at org.mortbay.xml.XmlParser.setValidating(XmlParser.java:91)
at org.mortbay.xml.XmlParser.<init>(XmlParser.java:83)
at org.mortbay.jetty.webapp.TagLibConfiguration.configureWebApp(TagLibConfiguration.java:210)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1247)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:186)
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:157)
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:169)
at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:119)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:500)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1055)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:804)
at com.google.gwt.dev.DevMode.main(DevMode.java:309)
[WARN] Nested in javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found:
java.lang.ClassNotFoundException: org.apache.xerces.jaxp.SAXParserFactoryImpl
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 com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:176)
at java.lang.ClassLoader.loadClass(Unknown Source)
at javax.xml.parsers.FactoryFinder.getProviderClass(Unknown Source)
at javax.xml.parsers.FactoryFinder.newInstance(Unknown Source)
at javax.xml.parsers.FactoryFinder.findJarServiceProvider(Unknown Source)
at javax.xml.parsers.FactoryFinder.find(Unknown Source)
at javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source)
at org.mortbay.xml.XmlParser.setValidating(XmlParser.java:91)
at org.mortbay.xml.XmlParser.<init>(XmlParser.java:83)
at org.mortbay.jetty.webapp.TagLibConfiguration.configureWebApp(TagLibConfiguration.java:210)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1247)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:186)
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:157)
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:169)
at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:119)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:500)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1055)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:804)
at com.google.gwt.dev.DevMode.main(DevMode.java:309)
The server is running at http://localhost:8888/
我在做什麼錯？
更新：This question可能有一些洞察力。
更新2：可能的重複this question。