找不到“org.apache.commons.logging.impl.Log4JLogger”[关闭]答案

【问题标题】：'org.apache.commons.logging.impl.Log4JLogger' cannot be found [closed]找不到“org.apache.commons.logging.impl.Log4JLogger”[关闭]
【发布时间】：2013-03-25 01:15:15
【问题描述】：

在我的 Java Web 服务中，我正在尝试使用 log4j 将日志写入 Windows 事件查看器。我使用 Eclipse 作为 IDE 来使用 Tomcat 部署它。

这是我的 log4j.properties：

log4j.rootLogger=DEBUG, CA, NTEventLog 


log4j.rootLogger=DEBUG, CA, NTEventLog 


#Console Appender 
log4j.appender.CA=org.apache.log4j.ConsoleAppender 
log4j.appender.CA.layout=org.apache.log4j.PatternLayout 
log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n 

#File Appender 
log4j.appender.FA=org.apache.log4j.FileAppender 
log4j.appender.FA.File=sample.log 
log4j.appender.FA.layout=org.apache.log4j.PatternLayout 
log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

#Event Log Appender
log4j.appender.NTEventLog=org.apache.log4j.nt.NTEventLogAppender
log4j.appender.NTEventLog.source=ESB Web Services


# Set the logger level of File Appender to WARN 
log4j.appender.FA.Threshold = WARN

这是我的类路径：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jre6">
        <attributes>
            <attribute name="owner.project.facets" value="java"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v6.0">
        <attributes>
            <attribute name="owner.project.facets" value="jst.web"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/>
    <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
    <classpathentry kind="lib" path="dom4j-1.6.1.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="jide-oss-2.1.1.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="jtds-1.2.6.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="poi-3.9-20121203.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="poi-ooxml-3.9-20121203.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="poi-ooxml-schemas-3.9-20121203.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="stax-api-1.0.1.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="xmlbeans-2.3.0.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="NTEventLogAppender.amd64.dll">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="NTEventLogAppender.dll">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="log4j-1.2.17.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-1.1.2.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-1.1.2-javadoc.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-1.1.2-sources.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-1.1.2-test-sources.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-1.1.2-tests.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-adapters-1.1.2.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-api-1.1.2.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="lib" path="commons-logging-tests.jar">
        <attributes>
            <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="output" path="build/classes"/>
</classpath>

一旦我在 tomcat 上部署代码，如下

出现异常：

org.apache.commons.logging.LogConfigurationException: User-specified log class 'org.apache.commons.logging.impl.Log4JLogger' cannot be found or is not useable.
    at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:874)
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:604)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:336)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:310)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685)
    at org.apache.axis2.deployment.DeploymentEngine.<clinit>(DeploymentEngine.java:76)
    at org.apache.axis2.transport.http.AxisServlet.initConfigContext(AxisServlet.java:584)
    at org.apache.axis2.transport.http.AxisServlet.init(AxisServlet.java:454)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Unknown Source)

【问题讨论】：

你有 log4j jar 放在 tomcat 的 WEB-INF/lib 文件夹下吗？
remove NTEventLog 也没有正确配置。
这里：workspace\Project\WebContent\WEB-INF\lib @linski
你是什么意思@RomanCpan>
@user1912404 没有布局，来源可疑。

标签： java eclipse tomcat log4j

【解决方案1】：

删除所有NTEventLog 的引用，它将起作用。如果您取消注释此附加程序，如果源是有效名称，它可能会起作用。

#log4j.rootLogger=DEBUG,CA,NTEventLog 
log4j.rootLogger=DEBUG,CA        

#Console Appender 
log4j.appender.CA=org.apache.log4j.ConsoleAppender 
log4j.appender.CA.layout=org.apache.log4j.PatternLayout 
log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n 

#File Appender 
log4j.appender.FA=org.apache.log4j.FileAppender 
log4j.appender.FA.File=sample.log 
log4j.appender.FA.layout=org.apache.log4j.PatternLayout 
log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

#Event Log Appender
#log4j.appender.NTEventLog=org.apache.log4j.nt.NTEventLogAppender
#log4j.appender.NTEventLog.layout=org.apache.log4j.PatternLayout
#log4j.appender.NTEventLog.layout.ConversionPattern=%m%n
#log4j.appender.NTEventLog.source=ESBWebServices


# Set the logger level of File Appender to WARN 
log4j.appender.FA.Threshold = WARN

不要忘记将 NTEventLogAppender.dll、NTEventLogAppender.amd64.dll、NTEventLogAppender.ia64.dll 或 NTEventLogAppender.x86.dll 适当地放置在 Windows 系统 PATH 上的目录中。否则，您将收到 java.lang.UnsatisfiedLinkError。

【讨论】：

但我遇到了另一个错误：java.lang.UnsatisfiedLinkError: no NTEventLogAppender in java.library.path at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown来源）在 java.lang.System.loadLibrary（未知来源）
代码在这一行崩溃：NTEventLogAppender eventLogAppender = new NTEventLogAppender();
我只是将 dll 添加到类路径中，如上所示
请再看一遍答案，我已经编辑过了
你需要把dll放到路径中。

【解决方案2】：

这可能是个问题：类文件存在于您的类路径中的两个 jar 中。

类文件：org.apache.commons.logging.impl.Log4JLogger

第一个罐子：commons-logging-1.1.2.jar

第二罐：commons-logging-adapters-1.1.2.jar

尝试移除第二个 jar 并重试。

【讨论】：

同样的错误，它不起作用

【解决方案3】：

我认为在 TOMCAT_HOME/lib 中有一个 commons-logging 副本，因此您可能会遇到类路径冲突，但我会检查 apache commons logging 文档以确保您已正确设置它。

【讨论】：

我检查了这个路径 C:\Users\KELEL\Desktop\apache-tomcat-6.0.36\lib 并且我没有找到 commons-logging 的副本
在tomcat\lib中添加jar