如何更改文件夹以在项目中创建文件？

Question

I created java maven web-application in IntelliJ Idea. When I try to create file for log(log4j.log) throught .xml file it creates but in Tomcat/bin folder. I'd like to create that file in project folder.

I've solved that problem on this way: change this part of .xml file

<param name="file" value="log4j.log"/>

to this

<param name="file" value="C:/Users/Igor/IdeaProjects/JA_Project/log4j.log"/>

The main problem I have to share my project on gitHub and If anybody else downloaded this project He'd have a problem because path on his computer is different

logger.xml file

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration debug="true"
                     xmlns:log4j='http://jakarta.apache.org/log4j/'>



 <appender name="console"
              class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                   value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
        </layout>
    </appender>

    <appender name="fileAppender"
              class="org.apache.log4j.FileAppender">
        <param name="file" value="C:/Users/Igor/IdeaProjects/JA_Lesson__6/log4j.log"/>
        <param name="maxFileSize" value="10KB" />
        <param name="maxBackupIndex" value="5" />
        <param name="threshold" value="error"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                   value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
        </layout>

        <filter class="org.apache.log4j.varia.LevelRangeFilter">
        <param name="levelMin" value="ERROR" />
        <param name="levelMax" value="ERROR" />
        </filter>

    </appender>

    <root>
        <level value="DEBUG" />
        <appender-ref ref="console" />
        <appender-ref ref="fileAppender" />
    </root>

</log4j:configuration>

How I can change folder for creating files in project?

Answer 1

When I start server I can see such line: Using CATALINA_BASE: "C:\\Users\\Igor.IntelliJIdea2019.3\\system\\tomcat\\Tomcat_9_0_19_Task"

My solution was to set

<param name="file" value="${catalina.base}/logs/server.log"/>

instead of

<param name="file" value="C:/Users/Igor/IdeaProjects/JA_Lesson__6/log4j.log"/>

Everyone has own path to CATALINA_BASE but structure inside is the same! It makes sense to use this "${catalina.base}/logs/"