eclipse 如何在Tomcat中配置另一个log4j配置文件？
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How to configure another log4j configuration file in Tomcat?
提问by Jaskey
I am using log4j1.2, and I am new to log4j.
我正在使用 log4j1.2，我是 log4j 的新手。
I hope that when I am debugging in my local machine ,the logs will be printed to console. But when it is running in PROD , it just logs to file, since I hope to have the least overhead.
我希望当我在本地机器上调试时，日志会打印到控制台。但是当它在 PROD 中运行时，它只是记录到文件中，因为我希望有最少的开销。
I hope that I can achieve this(only print to console when in local machine rather than the prod env) without modifying the properties file every time when I deploy.
我希望我可以实现这一点（仅在本地机器而不是 prod 环境中打印到控制台），而无需每次部署时修改属性文件。
Here is what my log4j.properties looks like：
这是我的 log4j.properties 的样子：
log4j.rootLogger=DEBUG,BAE,console,error
##################production logs###############
log4j.appender.BAE=org.apache.log4j.FileAppender
log4j.appender.BAE.encoding=utf-8
log4j.appender.BAE.Append=true
log4j.appender.BAE.Threshold=INFO
log4j.appender.BAE.layout=org.apache.log4j.SimpleLayout
####################Conole logs####################
##(hope only enable when debuging in local machine)
log4j.appender.console= org.apache.log4j.ConsoleAppender
log4j.appender.console.encoding=utf-8
## DEBUG logs
log4j.appender.console.Threshold = Trace
log4j.appender.console.layout=org.apache.log4j.SimpleLayout
##################error logs##########################
log4j.appender.error=org.apache.log4j.FileAppender
log4j.appender.error.File=/home/bae/log/error.log
log4j.appender.error.Threshold = ERROR
log4j.appender.error.Append=true
log4j.appender.error.layout=org.apache.log4j.SimpleLayout
回答by Paul Vargas
You can configure another log4j configuration file in your environment in eclipse:
您可以在 eclipse 中的环境中配置另一个 log4j 配置文件：
- First, locate your Tomcat server in eclipse (servers tab) and double-click:
- 首先，在 eclipse（服务器选项卡）中找到您的 Tomcat 服务器并双击：
- Next, click in Open lauch configuration:
- 接下来，单击Open lauch configuration：
- Add the log4j configuration argument in Tomcat and Apply.
- 在 Tomcat 和 Apply 中添加 log4j 配置参数。
Enjoy!
享受！
See more in Apache log4j 1.2 - Short introduction to log4j
回答by user5285742
If you do not have the log4j file in your path, you'll need to add something like this:
如果您的路径中没有 log4j 文件，则需要添加如下内容：
-Dlog4j.configuration="file:///C:/<path>/<nameifLog4jFile>"
Also if you use an environment variable in the log4j file, you need to declare it in the arguments. I have an env var by the name MAS_HOME that I use to specify the path to the log file. I then had to add this parameter to VM args:
此外，如果您在 log4j 文件中使用环境变量，则需要在参数中声明它。我有一个名为 MAS_HOME 的环境变量，用于指定日志文件的路径。然后我不得不将此参数添加到 VM args：
-DMAS_HOME="c:\EE"
回答by Rad
I wanted to put this as comment but there is not enough reputation :P
我想把它作为评论，但没有足够的声誉：P
Thismight help if you are using Maven.
And also take a look at this questionfor another solution.
回答by Jonatan Cloutier
You could use jvm param (answer from Brian Agnew : log4j configuration via JVM argument(s)?) :
您可以使用 jvm 参数（来自 Brian Agnew 的回答：通过 JVM 参数进行 log4j 配置？）：
Do you have a log4j configuration file ? Just reference it using
-Dlog4j.configuration={path to file}where {path to file} should be prefixed with
file:
你有 log4j 配置文件吗？只需使用引用它
-Dlog4j.configuration={path to file}其中 {path to file} 应该以
file:
