获取 java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory 异常
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Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception
提问by
i am executing simple Dependency Injection program of spring & getting this exception. I have already included common-logging1.1.1.jar and spring.jar file. Could you please help to out?
我正在执行 spring 的简单依赖注入程序并得到这个异常。我已经包含了 common-logging1.1.1.jar 和 spring.jar 文件。你能帮帮忙吗？
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:119)
at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:55)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:77)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:65)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:56)
at com.client.StoryReader.main(StoryReader.java:15)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 6 more
回答by emills
Try doing a complete clean of the target/deployment directory for the app to get rid of any stale library jars. Make a fresh build and check that commons-logging.jar is actually being placed in the correct lib folder. It might not be included when you are building the library for the application.
尝试彻底清除应用程序的目标/部署目录，以摆脱任何陈旧的库 jar。重新构建并检查 commons-logging.jar 是否实际放置在正确的 lib 文件夹中。当您为应用程序构建库时，它可能不包括在内。
回答by Jesper
I have already included common-logging1.1.1.jar and ...
我已经包含了 common-logging1.1.1.jar 和 ...
Are you sure you spelled the name of the JAR file exactly right? I think it should probably be commons-logging-1.1.1.jar(note the extra -in the name). Also check if the directory name is correct.
您确定您拼写的 JAR 文件名完全正确吗？我认为它可能应该是commons-logging-1.1.1.jar（注意-名称中的额外内容）。还要检查目录名称是否正确。
NoClassDefFoundErroralways means that a class cannot be found, so most likely your class path is not correct.
NoClassDefFoundError始终意味着找不到类，因此很可能您的类路径不正确。
回答by dhammikas
Just check whether the commons-logging.jar has been added to your libs and the classpath.. I had the same issue and that was because of this. dhammikas-
只需检查 commons-logging.jar 是否已添加到您的库和类路径中..我遇到了同样的问题，就是因为这个。法门——
回答by brianegge
I generally assign the classpath to a variable and then verify it. I've written a small ruby script which I include in a my startup scripts which validates the classpath before launching java. Validating the classpath before the JVM starts has saved me lots of time troubleshooting these types of problems.
我通常将类路径分配给一个变量，然后对其进行验证。我写了一个小的 ruby 脚本，我将它包含在我的启动脚本中，它在启动 java 之前验证类路径。在 JVM 启动之前验证类路径为我节省了大量时间来解决这些类型的问题。
回答by Manikandan
I have also faced the same issues, to fix, download the jar files from the below url
我也遇到了同样的问题，要修复，请从以下网址下载 jar 文件
http://commons.apache.org/logging/download_logging.cgi
http://commons.apache.org/logging/download_logging.cgi
and copy to your lib folder, will resolve your issue.
并复制到您的 lib 文件夹，将解决您的问题。
回答by rash
http://commons.apache.org/logging/download_logging.cgi
http://commons.apache.org/logging/download_logging.cgi
use this url to download jar files and include them in your class path, issue will be solved
使用此 url 下载 jar 文件并将它们包含在您的类路径中，问题将得到解决
回答by sonida
You just download commons-logging-1.1.2.jarand then copy this file in to libs
您只需下载commons-logging-1.1.2.jar然后将此文件复制到 libs
finally, it works.
最后，它起作用了。
回答by stacky
I had the same problem, and solved it by just adding the commons-logging.jarto the class path.
我遇到了同样的问题，只需将commons-logging.jar加到类路径中即可解决。
回答by Tush
Issue solved by adding commons-logging.jar
通过添加 commons-logging.jar 解决的问题
Imp files are ,
Imp 文件是，
antlr-runtime-3.0.1
org.springframework.aop-3.1.0.M2
org.springframework.asm-3.1.0.M2
org.springframework.aspects-3.1.0.M2
org.springframework.beans-3.1.0.M2
org.springframework.context.support-3.1.0.M2
org.springframework.context-3.1.0.M2
org.springframework.core-3.1.0.M2
org.springframework.expression-3.1.0.M2
commons-logging-1.1.1
回答by asuka
If you're using maven for managing dependencies, add the following line in your pom.xml:
如果您使用 maven 管理依赖项，请在 pom.xml 中添加以下行：
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
