在struts2 中加了json 就出错了。

Question

严重: Exception starting filter struts2
The package name 'json-default' at location package - jar:file:/C:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/fsgl/WEB-INF/lib/jsonplugin-0%5B1%5D.34.jar!/struts-plugin.xml:8:59 is already been used by another package at location package - jar:file:/C:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/fsgl/WEB-INF/lib/jsonplugin-0.32.jar!/struts-plugin.xml:8:59 - package - jar:file:/C:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/fsgl/WEB-INF/lib/jsonplugin-0%5B1%5D.34.jar!/struts-plugin.xml:8:59
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.addPackageConfig(DefaultConfiguration.java:95)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:435)
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:201)
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)
2010-1-15 14:41:51 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2010-1-15 14:41:51 org.apache.catalina.core.StandardContext start
严重: Context [/fsgl] startup failed due to previous errors

Answer 1

1.Jar包：
  struts2-json-plugin-x.x.x.jar放在lib目录下。2.struts.xml中package配置：
<package name="ajaxj" extends="json-default" namespace="/ajaxj"> <action name="AJR001" method="doRequest" class="ajr001Action">
<result type="json" />
</action></package>

Answer 2

struts-plugin.xml is already been used by another package at location package 这个包已经在项目中了？或者重复配置了？

Answer 3

解决了。
原来我在项目中把.34.jar删了。又加了.32.jar.
可是tomcat下居然没有把.34删了。
晕。