Struts2 入门配置小实例

    前段时间一直在学习struts1.x，今天试着配置了一下，struts2.x，用的版本是struts2.0.14，因为现在对于2.0和2.1的区别还不是很清楚，所以先用了比较低的版本试一下。
    就写了一个login项目，启动tomcat时就出现了配置方面的错误。在这里总结一下

  
警告: Settings: Could not parse struts.locale setting, substituting default VM locale
2009-8-15 13:41:10 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
Error building results for action login in namespace  - action - file:/C:/Tomcat%206.0/webapps/struts2/WEB-INF/classes/struts.xml:7:58
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:340)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:429)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:239)
	at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:152)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
	at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:205)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3709)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4363)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:926)
	at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:889)
	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:516)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: There is no result type defined for type '/result.jsp' mapped with name 'success' - result - file:/C:/Tomcat%206.0/webapps/struts2/WEB-INF/classes/struts.xml:8:48
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:584)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:338)
	... 35 more
2009-8-15 13:41:10 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2009-8-15 13:41:10 org.apache.catalina.core.StandardContext start
严重: Context [/struts2] startup failed due to previous errors
2009-8-15 13:41:10 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2009-8-15 13:41:10 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2009-8-15 13:41:10 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/47  config=null
2009-8-15 13:41:10 org.apache.catalina.startup.Catalina start
信息: Server startup in 5747 ms

---------------解决如下-----------
看了错误信息，首先想到的是struts.xml的问题

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
	<package name="struts2" extends="struts-default" >
		<action name="login" 
		        class="com.mp.struts.LoginAction"
		>
		
		<result name="success" 
		        type = "/result.jsp"
	    ></result>
		</action>
	</package></struts>

第一次看了一下，并没有找到什么错误，然后就想着是不是namespace没有配置正确
然后又加了namespace的配置，
   

还是错误，之后试了好几次，一点一点的排查，终于发现自己犯了一个很低级的错误

Error building results for action login in namespace   

仔细看了一下这个错误提示，应该是result标签的错误了，

<result name="success" 
		        type = "/result.jsp"
	    ></result>

一看，我竟然写成了这样

因为我在myeclipse里面是用的 xml editor编辑的，出现的不是这个画面所以当时没有注意，改成如下：

<result name="success" >
			/result.jsp
	    </result>

启动就正常了
希望能对初学者有所帮助
关于我的那个项目的工程文件在附件中