在Maven和Tomcat中发生冲突？

Question

我在加载jar时遇到了一些麻烦.我在Tomcat上部署了Struts2 Web应用程序,导致错误:

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:....../Tomcat%206.0/lib/slf4j-log4j12-1.5.8.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:....../Tomcat%206.0/webapps/Timesheet/WEB-INF/lib/slf4j-log4j12-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
2011-03-31 14:33:48,302 DEBUG com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles:748 - Loading action configurations from: struts-default.xml
2011-03-31 14:33:50,592 DEBUG com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles:832 - Loaded action configuration from: struts-default.xml
...
2011-03-31 14:33:50,809 DEBUG com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register:202 - Loaded type:com.opensymphony.xwork2.util.XWorkConverter name:struts impl:com.opensymphony
.xwork2.util.AnnotationXWorkConverter
Mar 31, 2011 2:33:50 PM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
Mar 31, 2011 2:33:50 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/Timesheet] startup failed due to previous errors

我已经排除了所有jar冲突pom.xml,但它似乎是slf4j-log4jTomcat lib中的另一个文件.

然后我试图删除Tomcat/lib中的slf4j-log4j12-1.5.8.jar并重新运行战争,但仍然有另一个错误:

Mar 31, 2011 2:44:51 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(...\Tomcat 6.0\webapps\Timesheet\WEB-INF\lib\servlet-api-2.4.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class:
javax/servlet/Servlet.class
... // Struts file still loaded here, but another Error filterStart: the same as above.

我在这里错过了吗？

编辑:我删除了pom.xml中包含的冗余servlet-api:它被另一个jar意外包含.但在排除那个罐子后我得到了错误:

Mar 31, 2011 4:11:19 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(...\Tomcat 6.0\webapps\Timesheet\WEB-INF\lib\servlet-api-2.4.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class:
javax/servlet/Servlet.class
2011-03-31 16:11:20,234 DEBUG com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles:748 - Loading action configurations from: struts-default.xml
2011-03-31 16:11:21,028 DEBUG com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles:832 - Loaded action configuration from: struts-default.xml

我的Tomcat中的servlet-api版本为2.5; pom.xml中排除的servlet-api.jar的版本为2.4.

Answer 1

我不认为tomcat捆绑了slf4j,所以删除它tomcat/lib是一个合适的步骤.

然后,你不应该servlet-api-x.jar进入WEB-INF/lib,因为它与tomcat捆绑在一起.将它标记为<scope>provided</scope>maven pom.

确保一切都清理完毕 mvn clean