Maven依赖项和日志记录- Slf4j和Log4j
Maven依赖项和日志记录- Slf4j和Log4j
提问于 2014-05-21 06:49:58
我正在使用Maven来管理基于spring的项目中的项目依赖关系。
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
<!-- <scope>provided</scope> -->
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
<!-- <scope>provided</scope> -->
</dependency>但是，部署在同一服务器上的其他一些项目使用tomcat的lib目录中的slf4j和log4j库，我无法删除这些库。
Slf4J和Log4J版本出现在tomcat的lib目录中 slf4j-api-1.4.2 log4j-1.2.14 slf4j-log4j12-1.5.2
当我从tomcat的lib目录中删除这些库并使用项目pom中提到的库时，我的项目运行良好
当我在项目的pom文件中注释依赖项并使用tomcat的lib中的依赖项时，会引发异常
> SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder.getSingleton()Lorg/slf4j/impl/StaticLoggerBinder;
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:657)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:282)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5291)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
>May 21, 2014 11:57:27 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
May 21, 2014 11:57:27 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/onevalue] startup failed due to previous errors
May 21, 2014 11:57:27 AM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
May 21, 2014 11:57:27 AM org.apache.catalina.core.StandardContext listenerStop
SEVERE: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.ExceptionInInitializerError
at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:116)
at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4837)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5484)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalStateException: org.slf4j.LoggerFactory could not be successfully initialized. See also http://www.slf4j.org/codes.html#unsuccessfulInit
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:303)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:657)
at org.springframework.web.context.ContextCleanupListener.<clinit>(ContextCleanupListener.java:43)
... 12 more我还尝试使用maven作用域“提供”，同时将库保存在tomcat的lib目录中。虽然该项目运行，但现在日志机制无法工作，没有创建日志，甚至System.out.println()也无法在控制台窗口上打印任何内容
回答 2
Stack Overflow用户
回答已采纳
发布于 2014-05-21 08:47:57
似乎您需要将项目降级为slf4j 1.4.2，以便使用tomcat中可用的log4j。它们是二进制不相容的。之后你还会继续使用<scope>provided</scope>，所以你不会把它们双倍地包含进去。
另一种方法是让另一个项目包含库本身，并从tomcat公共项目中删除。我知道在猫身上没有其他排除机制。
作为参考，而且可能没有帮助，我目前部署在weblogic上，它有一个部署规范，允许将服务器公共类排除在外，而使用捆绑类，例如下面的片段(带参考)
<wls:prefer-application-packages>
<!-- http://blog.terrencemiao.com/archives/annoying-slf4j-problem-in-weblogic-server-12c -->
<wls:package-name>org.slf4j</wls:package-name>
</wls:prefer-application-packages>Stack Overflow用户
发布于 2014-05-21 09:06:29
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>这是我的配置，对我来说很好。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/23775906
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号