Jetty启动webApp报错，是因为没有加全依赖

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如下：

2016-07-06 10:24:47.748:INFO::Logging to STDERR via org.mortbay.log.StdErrLog2016-07-06 10:24:47.764:INFO::jetty-6.1.252016-07-06 10:24:47.826:INFO::NO JSP Support for /myWeb, did not find org.apache.jasper.servlet.JspServletlog4j:WARN No appenders could be found for logger (org.apache.struts.util.PropertyMessageResources).log4j:WARN Please initialize the log4j system properly.2016-07-06 10:24:48.216:WARN::EXCEPTION java.lang.ClassNotFoundException: org.eclipse.jetty.servlet.DefaultServletat java.net.URLClassLoader.findClass(URLClassLoader.java:381)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:401)at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:363)at org.mortbay.util.Loader.loadClass(Loader.java:91)at org.mortbay.util.Loader.loadClass(Loader.java:71)at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73)at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242)at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1272)at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:489)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.heroinex.install.install.main(install.java:31)2016-07-06 10:24:48.216:INFO:/myWeb:Unavailable javax.servlet.UnavailableException: org.eclipse.jetty.servlet.DefaultServlet2016-07-06 10:24:48.216:WARN::failed default: java.lang.NullPointerException2016-07-06 10:24:48.216:WARN::Failed startup of context org.mortbay.jetty.webapp.WebAppContext@36f0f1be{/myWeb,webapps/myWeb}java.lang.NullPointerExceptionat java.lang.Class.isAssignableFrom(Native Method)at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256)at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1272)at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:489)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.heroinex.install.install.main(install.java:31)2016-07-06 10:24:48.263:INFO::Started SelectChannelConnector@0.0.0.0:17000

加上依赖就行了：

<dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-server</artifactId><version>7.2.2.v20101205</version></dependency><dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-webapp</artifactId><version>7.2.2.v20101205</version></dependency><dependency><groupId>org.eclipse.jetty</groupId><artifactId>jetty-jsp-2.1</artifactId><version>7.2.2.v20101205</version></dependency><dependency><groupId>org.mortbay.jetty</groupId><artifactId>jsp-2.1-glassfish</artifactId><version>2.1.v20100127</version></dependency>

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