struts2 报错

错误信息：

Unable to load configuration. - action - file:/E:/programfiles_vm/apache-tomcat-7.0.92/webapps/struts2_day002/WEB-INF/classes/com/hyk/demo1/test3.struts.xml:10:57
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:957)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:463)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:496)
at org.apache.struts2.dispatcher.InitOperations.initDispatcher(InitOperations.java:73)
at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:61)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:285)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:266)
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4997)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5699)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase S t a r t C h i l d . c a l l ( C o n t a i n e r B a s e . j a v a : 1707 ) a t o r g . a p a c h e . c a t a l i n a . c o r e . C o n t a i n e r B a s e StartChild.call(ContainerBase.java:1707) at org.apache.catalina.core.ContainerBase StartChild.call(ContainerBase.java:1707)atorg.apache.catalina.core.ContainerBaseStartChild.call(ContainerBase.java:1697)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

Caused by: Action class [com.hyk.demo1.Test3] does not have a public no-arg constructor

action - file:/E:/programfiles_vm/apache-tomcat-7.0.92/webapps/struts2_day002/WEB-INF/classes/com/hyk/demo1/test3.struts.xml:10:57
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyAction(XmlConfigurationProvider.java:511)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:457)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:572)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:326)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:108)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:196)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
… 17 more

解决方法：

仔细看错误信息，错误信息中有一句Caused by: Action class [com.hyk.demo1.Test3] does not have a public no-arg constructor，指的是action中没有公共的无参构造方法，检查action类发现，构造方法前没有加public，加上之后问题解决。

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struts2 报错

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解决方法：

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