单个WAR文件中的多个jar中的log4j.xml冲突

Question

我的WAR应用程序结构如下：

    MyApp
    |_ WEB-INF/
      |_ log4j.xml -> Print to File
        |_ libs/
          |_ abc.jar/
            |_log4j.xml -> Print to STDOUT

因此，在我的应用程序加载时，它将在WEB-INF下选择log4j.xml并开始登录文件。 但是，从abc.jar请求的任何类都将开始在该abc.jar中加载类以及资源，从而替换到STDOUT的日志记录。而且，文件记录突然弯曲了：（

我们可以覆盖/忽略依赖项jar文件中可用的底层log4j.xml吗？

Web服务器日志：

    loadClass(java.io.PrintStream, false)
      Returning class from cache
    loadClass(java.lang.StringBuilder, false)
      Returning class from cache
    loadClass(java.lang.StringBuffer, false)
      Returning class from cache
    loadClass(xxx.xxxx.ServiceHandle, false)
      Searching local repositories
        findClass(xxx.xxxx.ServiceHandle)
      Loading class from local repository
    loadClass(xxx.xxxx.ServiceNotFoundException, false)
      Searching local repositories
        findClass(xxx.xxxx.ServiceNotFoundException)
      Loading class from local repository
    loadClass(xxx.xxxx.RawDataCallback, false)
      Searching local repositories
        findClass(xxx.xxxx.RawDataCallback)
      Loading class from local repository
    loadClass(xxx.xxxx.Logger, false)
      Searching local repositories
        findClass(xxx.xxxx.Logger)
      Loading class from local repository
    loadClass(org.apache.log4j.spi.LoggerFactory, false)
      Delegating to parent classloader1 java.net.URLClassLoader@2a098129
      Loading class from parent
    loadClass(org.apache.log4j.or.ObjectRenderer, false)
      Delegating to parent classloader1 java.net.URLClassLoader@2a098129
      Loading class from parent
    loadClass(xxx.xxxx.Logger$DataRecordRenderer, false)
      Searching local repositories
        findClass(xxx.xxxx.Logger$DataRecordRenderer)
      Loading class from local repository
    loadClass(org.apache.log4j.LogManager, false)
      Delegating to parent classloader1 java.net.URLClassLoader@2a098129
      Loading class from parent
    getResource(log4j.xml)
        findResource(log4j.xml)
        --> Returning 'jar:file:serverPath/WEB-INF/lib/xxx.xxxx-1.0.0.jar!/log4j.xml'
      --> Returning 'jar:file:serverPath/WEB-INF/lib/xxx.xxxx-1.0.0.jar!/log4j.xml'
    loadClass(org.apache.log4j.xml.DOMConfigurator, false)
      Delegating to parent classloader1 java.net.URLClassLoader@2a098129
      Loading class from parent
        findResources(META-INF/services/javax.xml.parsers.DocumentBuilderFactory)
    loadClass(com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl, false)

    ......... No more logging ...........