Unable to load configuration. - Class: java.net.PlainSocketImpl

来源：http://hi.baidu.com/albert02/blog/item/0af0f5304b03cf93a9018e9f.html

 

严重: Exception starting filter struts2
Unable to load configuration. - Class: java.net.PlainSocketImpl
File: PlainSocketImpl.java
Method: connect
Line: 177 - java/net/PlainSocketImpl.java:177:-1
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
    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)

解决不联网无法启动struts2问题
将struts.xml中的声明部分
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts

Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">

替换为 struts2-core-2.xxx.jar中struts-default.xml的文

件声明
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts

Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

也就是说要保持一致！！O(∩_∩)O~
默认包中用的2.0 而 struts.xml中却用了2.1 所以会出现问题 替换一下就解决了