今天跑了下新搭的一个SSI框架。报如下错误：
严重: Exception sending context initialized event to listener instance of class com.j.chat.upgrade.web.core.SystemLaunchListenerjava.lang.IllegalStateException: No WebApplicationContext found: no ContextLoaderListener registered? at org.springframework.web.context.support.WebApplicationContextUtils.getRequiredWebApplicationContext(WebApplicationContextUtils.java:84) at com.j.chat.upgrade.web.core.SystemLaunchListener.contextInitialized(SystemLaunchListener.java:27) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)2014-7-14 19:49:10 org.apache.catalina.core.ApplicationContext log信息: Initializing Spring root WebApplicationContext很纳闷，我在web.xml里面已经声明了ContextLoaderListener 这个监听器。我的web.xml配置文件如下：
<listener> <listener-class>com.j.chat.upgrade.web.core.SystemLaunchListener</listener-class></listener><listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-config.xml</param-value></context-param>网上搜了下web.xml文件里listener的执行顺序。下面是一个可信的说法：
在java web规范中说明.按照listner,filter,servlet的顺序初始化. 而其中listener是按照在web.xml中的声明顺序执行的，不存在并发的的情况.