一个棘手的运行错误！急求！！在线等！

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/F:/out/artifacts/web.war/WEB-INF/lib/logback-classic-0.9.15.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/F:/out/artifacts/web.war/WEB-INF/lib/slf4j-jcl-1.5.8.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
2012-09-28 16:19:50,912 [main] ERROR org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'mailSender' defined in file [F:\out\artifacts\web.war\WEB-INF\classes\applicationContext-mail.xml]: Could not resolve placeholder 'mail.host'
at org.springframework.beans.factory.config.PropertyPlaceholderConfigurer.processProperties(PropertyPlaceholderConfigurer.java:272) [org.springframework.beans-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:75) [org.springframework.beans-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:663) [org.springframework.context-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:638) [org.springframework.context-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:407) [org.springframework.context-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276) [org.springframework.web-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197) [org.springframework.web-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) [org.springframework.web-3.0.3.RELEASE.jar:3.0.3.RELEASE]
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206) [catalina.jar:6.0.35]
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705) [catalina.jar:6.0.35]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799) [catalina.jar:6.0.35]
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779) [catalina.jar:6.0.35]
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601) [catalina.jar:6.0.35]
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675) [catalina.jar:6.0.35]
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601) [catalina.jar:6.0.35]
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502) [catalina.jar:6.0.35]
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317) [catalina.jar:6.0.35]
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324) [catalina.jar:6.0.35]
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) [catalina.jar:6.0.35]
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065) [catalina.jar:6.0.35]
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) [catalina.jar:6.0.35]
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) [catalina.jar:6.0.35]
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) [catalina.jar:6.0.35]
at org.apache.catalina.core.StandardService.start(StandardService.java:525) [catalina.jar:6.0.35]
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) [catalina.jar:6.0.35]
at org.apache.catalina.startup.Catalina.start(Catalina.java:595) [catalina.jar:6.0.35]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [na:1.6.0_27]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [na:1.6.0_27]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [na:1.6.0_27]
at java.lang.reflect.Method.invoke(Method.java:597) [na:1.6.0_27]
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) [bootstrap.jar:6.0.35]
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) [bootstrap.jar:6.0.35]
2012-9-28 16:19:50 org.apache.catalina.core.StandardContext start
严重: Error listenerStart
2012-9-28 16:19:50 org.apache.catalina.core.StandardContext start
严重: Context [] startup failed due to previous errors
2012-9-28 16:19:52 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory docs
2012-9-28 16:19:52 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory examples
2012-9-28 16:19:52 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory host-manager
2012-9-28 16:19:52 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory manager
2012-9-28 16:19:52 org.apache.coyote.http11.Http11Protocol start
信息: Starting Coyote HTTP/1.1 on http-80
2012-9-28 16:19:52 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8009
2012-9-28 16:19:52 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/42  config=null
2012-9-28 16:19:52 org.apache.catalina.startup.Catalina start
信息: Server startup in 29685 ms
Connected to server
--------------------编程问答-------------------- Class path contains multiple SLF4J bindings.
绑定了多个傻来疯! 楼主检查一下jar包和版本 --------------------编程问答-------------------- 绑定了多个傻来疯! ？

补充：Java ,  Web 开发