struts2 学习，第一节

从昨天开始系统学习struts2，不过在第一个例子:HelloWorld的时候就出现问题了。按照网上的教程写好例子，在Eclipse里运行。提示下面的错误：2010-11-24 15:51:32 org.apache.catalina.core.AprLifecycleListener init 信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:/Program Files/Java/jre6/bin;.;C:/Windows/Sun/Java/bin;C:/Windows/system32;C:/Windows;C:/Program Files/Java/jdk1.6.0_21/bin/../jre/bin/client;C:/Program Files/Java/jdk1.6.0_21/bin/../jre/bin;C:/Program Files/Common Files/Microsoft Shared/Windows Live;C:/Program Files/Java/jdk1.6.0_21/bin;C:/Program Files/Java/jre6/bin;C:/Windows/system32;C:/Windows;C:/Windows/System32/Wbem;C:/Windows/System32/WindowsPowerShell/v1.0/;C:/Program Files/ATI Technologies/ATI.ACE/Core-Static;C:/Program Files/Intel/DMIX;C:/Program Files/Common Files/Thunder Network/KanKan/Codecs;C:/Program Files/Windows Live/Shared;C:/Program Files/TortoiseSVN/bin;D:/Program Files/IDM Computer Solutions/UltraEdit/ 2010-11-24 15:51:32 org.apache.tomcat.util.digester.SetPropertiesRule begin 警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:MyFirstStruts' did not find a matching property. 2010-11-24 15:51:32 org.apache.coyote.http11.Http11Protocol init 信息: Initializing Coyote HTTP/1.1 on http-8080 2010-11-24 15:51:32 org.apache.catalina.startup.Catalina load 信息: Initialization processed in 382 ms 2010-11-24 15:51:32 org.apache.catalina.core.StandardService start 信息: Starting service Catalina 2010-11-24 15:51:32 org.apache.catalina.core.StandardEngine start 信息: Starting Servlet Engine: Apache Tomcat/6.0.29 2010-11-24 15:51:32 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Parsing configuration file [struts-default.xml] 2010-11-24 15:51:32 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Unable to locate configuration files of the name struts-plugin.xml, skipping 2010-11-24 15:51:32 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Parsing configuration file [struts-plugin.xml] 2010-11-24 15:51:33 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info 信息: Parsing configuration file [struts.xml] 2010-11-24 15:51:33 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error 严重: Dispatcher initialization failed java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:295) at com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector.construct(ContainerImpl.java:431) at com.opensymphony.xwork2.inject.ContainerBuilder$5.create(ContainerBuilder.java:207) at com.opensymphony.xwork2.inject.Scope$2$1.create(Scope.java:51) at com.opensymphony.xwork2.inject.ContainerBuilder$3.create(ContainerBuilder.java:93) at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:487) at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:484) at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:574) at com.opensymphony.xwork2.inject.ContainerBuilder.create(ContainerBuilder.java:484) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.createBootstrapContainer(DefaultConfiguration.java:252) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415) at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4001) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) 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:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: java.lang.reflect.InvocationTargetException 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 com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:293) ... 32 more Caused by: java.lang.ExceptionInInitializerError at com.opensymphony.xwork2.ognl.OgnlValueStackFactory.setContainer(OgnlValueStackFactory.java:85) ... 37 more Caused by: java.lang.IllegalArgumentException: Javassist library is missing in classpath! Please add missed dependency! at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:165) ... 38 more Caused by: java.lang.ClassNotFoundException: javassist.ClassPool at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:162) ... 38 more 2010-11-24 15:51:33 org.apache.catalina.core.StandardContext filterStart 严重: Exception starting filter struts2 java.lang.reflect.InvocationTargetException - Class: com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector File: ContainerImpl.java Method: inject Line: 295 - com/opensymphony/xwork2/inject/ContainerImpl.java:295:-1 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:428) at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4001) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:295) at com.opensymphony.xwork2.inject.ContainerImpl$ConstructorInjector.construct(ContainerImpl.java:431) at com.opensymphony.xwork2.inject.ContainerBuilder$5.create(ContainerBuilder.java:207) at com.opensymphony.xwork2.inject.Scope$2$1.create(Scope.java:51) at com.opensymphony.xwork2.inject.ContainerBuilder$3.create(ContainerBuilder.java:93) at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:487) at com.opensymphony.xwork2.inject.ContainerBuilder$7.call(ContainerBuilder.java:484) at com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:574) at com.opensymphony.xwork2.inject.ContainerBuilder.create(ContainerBuilder.java:484) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.createBootstrapContainer(DefaultConfiguration.java:252) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415) ... 19 more Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.opensymphony.xwork2.inject.ContainerImpl$MethodInjector.inject(ContainerImpl.java:293) ... 32 more Caused by: java.lang.ExceptionInInitializerError at com.opensymphony.xwork2.ognl.OgnlValueStackFactory.setContainer(OgnlValueStackFactory.java:85) ... 37 more Caused by: java.lang.IllegalArgumentException: Javassist library is missing in classpath! Please add missed dependency! at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:165) ... 38 more Caused by: java.lang.ClassNotFoundException: javassist.ClassPool at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at ognl.OgnlRuntime.<clinit>(OgnlRuntime.java:162) ... 38 more 2010-11-24 15:51:33 org.apache.catalina.core.StandardContext start 严重: Error filterStart 2010-11-24 15:51:33 org.apache.catalina.core.StandardContext start 严重: Context [/MyFirstStruts] startup failed due to previous errors 2010-11-24 15:51:33 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap 严重: The web application [/MyFirstStruts] created a ThreadLocal with key of type [null] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@3c2378]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@3cc262]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.

在遍访了度娘和谷歌大婶后，终于找到了一位前辈的解决办法，

原来是struts2的jar里面。除了基本的：

commons-logging-1.0.4.jar

freemarker-2.3.16.jar

ognl-3.0.jar

struts2-core-2.2.1.jar

xwork-core-2.2.1.jar

以外，还要导入：

commons-fileupload-1.2.1.jar

commons-io-1.3.2.jar

javassist-3.7.ga.jar （ 在E:/software/struts-2.2.1/apps /struts2-blank-2.2.1.war中）

将这三个包加到工程里面后，在运行，就好了。

而且在eclipse中开发struts2工程时，要注意，发布过程中，要确定一下，eclipse是否将src下的struts。xml文件发布到WEB-INF中的classes中。

如果没有的话，还需要手动的发布一下。