eclipse 找不到“org.apache.commons.logging.impl.Log4JLogger”
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'org.apache.commons.logging.impl.Log4JLogger' cannot be found
提问by user1912404
In my Java Web Service, I am trying to write logs to windows event viewer, using log4j. I am using Eclipse as an IDE to deploy it using Tomcat.
在我的 Java Web 服务中，我尝试使用 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。
this is my log4j.properties:
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
this is my classpath:
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>
once I deploy the the code on tomcat the following
一旦我在 tomcat 上部署了以下代码
exception occur:
发生异常：
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)
采纳答案by Roman C
remove all references of NTEventLogand it will work. If you uncomment this appender it may be work if the source is a valid name.
删除所有引用，NTEventLog它将起作用。如果你取消注释这个 appender，如果源是一个有效的名称，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
Do not forget to place NTEventLogAppender.dll, NTEventLogAppender.amd64.dll, NTEventLogAppender.ia64.dll or NTEventLogAppender.x86.dll as appropriate in a directory that is on the PATH of the Windows system. Otherwise, you will get a java.lang.UnsatisfiedLinkError.
不要忘记将 NTEventLogAppender.dll、NTEventLogAppender.amd64.dll、NTEventLogAppender.ia64.dll 或 NTEventLogAppender.x86.dll 适当地放置在 Windows 系统路径上的目录中。否则，您将收到 java.lang.UnsatisfiedLinkError。
回答by Biswajit
I think there's a copy of commons-logging in TOMCAT_HOME/lib, so potentially you could be encountering a classpath conflict, but I'd check the apache commons logging docs to make sure you've got it set up properly.
我认为在 TOMCAT_HOME/lib 中有一个 commons-logging 的副本，因此您可能会遇到类路径冲突，但我会检查 apache commons 日志记录文档以确保您已正确设置它。
回答by Garry
This could be an issue: the class file is present in two jars in your classpath.
这可能是一个问题：类文件存在于类路径中的两个 jar 中。
Class file : org.apache.commons.logging.impl.Log4JLogger
类文件： org.apache.commons.logging.impl.Log4JLogger
1st Jar : commons-logging-1.1.2.jar
第一个罐子： commons-logging-1.1.2.jar
2nd Jar : commons-logging-adapters-1.1.2.jar
第二罐： commons-logging-adapters-1.1.2.jar
Try to remove the second jar and try again.
尝试取出第二个罐子并重试。
