java Logback：如何将日志目录从“tomcat/bin”更改为与应用程序相关的目录？
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Logback: how to change log directory from "tomcat/bin" to application related?
提问by Sergey
I want to use slf4jwith logbackfor logging.
我想使用带有logback 的slf4j进行日志记录。
You can see my logback.xml below:
你可以在下面看到我的 logback.xml：
<configuration>
<appender name="FILE-MODULE" class="ch.qos.logback.core.FileAppender">
<file>module.log</file>
<encoder>
<pattern>
%date %level [%thread] %logger{10} [%file:%line] %msg%n
</pattern>
</encoder>
</appender>
<logger name="module" level="debug" additivity="false">
<appender-ref ref="FILE-MODULE" />
</logger>
</configuration>
The problem is: when I deploy my application to Tomcat, log file is stored in tomcat/binfolder, and I want to store it in myapp folder (tomcat/webapp/myapp).
问题是：当我将应用程序部署到 Tomcat 时，日志文件存储在tomcat/bin文件夹中，我想将其存储在 myapp 文件夹（tomcat/webapp/myapp）中。
How can I do that?
我怎样才能做到这一点？
回答by Sergey
Well, I solved my problem but it is not very good solution (by my opinion).
好吧，我解决了我的问题，但这不是很好的解决方案（我认为）。
First of all I put absolute path to log file in .property file. For example:
首先，我将日志文件的绝对路径放在 .property 文件中。例如：
logback.log.location=d:\Tomcat\tomcat_8.0.0-RC5\webapps\module\logs
Then I use that property in my logback.xml:
然后我在 logback.xml 中使用该属性：
<configuration>
<property file="src\main\resources\system_config.properties" />
<appender name="FILE-MODULE" class="ch.qos.logback.core.FileAppender">
<file>${logback.log.location}\module.log</file>
<encoder>
<pattern>
%date %level [%thread] %logger{10} [%file:%line] %msg%n
</pattern>
</encoder>
</appender>
<logger name="module" level="debug" additivity="false">
<appender-ref ref="FILE-MODULE" />
</logger>
</configuration>
More details you can see here. This is an example, that I use.
But in solution above we have environment specific absolute path to the logs. This is ugly. Of course, we can use system variable CATALINA_HOMEto avoid absolute path. But, as I know, CATALINA_HOME can be undefined. Or, we can use another instance of tomcat, that is not in CATALINA_HOME.
但是在上面的解决方案中，我们有环境特定的日志绝对路径。这是丑陋的。当然，我们可以使用系统变量CATALINA_HOME来避免绝对路径。但是，据我所知，CATALINA_HOME 可以是未定义的。或者，我们可以使用另一个不在 CATALINA_HOME 中的 tomcat 实例。
Maybe someone have more nice solution that will be environment independent?
也许有人有更好的解决方案，将与环境无关？
UPDATE
更新
Another solution:
另一种解决方案：
Just use relative (to tomcat\bin) path instead absolute in logback.xml:
只需在 logback.xml 中使用相对（到 tomcat\bin）路径而不是绝对路径：
<configuration>
<appender name="FILE-MODULE" class="ch.qos.logback.core.FileAppender">
<file>..\webapps\module\module.log</file>
<encoder>
<pattern>
%date %level [%thread] %logger{10} [%file:%line] %msg%n
</pattern>
</encoder>
</appender>
<logger name="module" level="debug" additivity="false">
<appender-ref ref="FILE-MODULE" />
</logger>
</configuration>
It was the first idea, that I try to implement. I don't know, why it didn't work before. Maybe there were other problems. Moreover thisand thisarticles confused me.
这是我尝试实施的第一个想法。我不知道，为什么它以前不起作用。也许还有其他问题。而且这和这文章让我感到困惑。
But now this solution work fine. This is exactly that I am looking for =)
但现在这个解决方案工作正常。这正是我正在寻找的 =)
回答by Praval Sharma
If you do not want to save your logs in Tomcat's bin folder then use ${catalina.base}as file path prefix in logback.xmlfile.
如果您不想将日志保存在 Tomcat 的 bin 文件夹中，请${catalina.base}在logback.xml文件中用作文件路径前缀。
<file>${catalina.base}/logs/log.log</file>
Here log file will be saved in existing logs folder of Tomcat instead of bin.
这里的日志文件将保存在 Tomcat 现有的日志文件夹中，而不是保存在 bin 中。
