如何配置maven以在不同环境下使用不同的log4j.properties文件[英] How to configure maven to use different log4j.properties files in different environments

问题描述

I want to be able to use different log4j configuration for different environments.

In my development environment, I want to use log4j.properties (A). But when I build in Maven for the production environment, I want to use log4j.properties (B).

Please tell me how to configure this in my pom.xml?

推荐答案

1. in your project add 3 folders : 

  Your Project\src\main\resources\

            \A > log4j.properties
            \B > log4j.properties
            \Default > log4j.properties
2. in pom.xml         

       <properties>
                <param>Default</param> 
        </properties>

        <build>
            <resources>
                <resource>
                    <directory>src/main/resources/${param}</directory>           
                </resource>
            </resources>
        </build> 

3. 

 - if : mvn clean install : classpath => log4j.properties(Default)

 - if : mvn clean install  -Dparam=A : classpath => log4j.properties(A)

 - if : mvn clean install  -Dparam=B : classpath => log4j.properties(B)


> much better than using profiles is more extensible without touching the pom

其他推荐答案

You can use profiles to achieve the desired behavior:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-resources-plugin</artifactId>
            <version>2.5</version>
            <executions>
                <execution>
                    <id>log4j</id>
                    <phase>process-resources</phase>
                    <goals>
                        <goal>copy-resources</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>output_directory</outputDirectory>
                        <resources>
                            <resource>${log4j.file}</resource>
                        </resources>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<profiles>
    <profile>
        <id>dev</id>
        <activation>
            <activeByDefault>true</activeByDefault>
        </activation>
        <properties>
            <log4j.file>path_to_file_A</log4j.file>
        </properties>
    </profile>
    <profile>
        <id>prod</id>
        <properties>
            <log4j.file>path_to_file_B</log4j.file>
        </properties>
    </profile>
</profiles>

其他推荐答案

You don't need the maven-resources-plugin if you have a simple environment.

In this example, log4j.properties B is the file you use for production and is in the directory src/main/java and log4j.properties A is the file you use for development and is in the directory /Users/junger/.m2/.

In your pom.xml:

<properties>
    <log4j.properties.directory>src/main/java</log4j.properties.directory>
</properties>

<build>
    <resources>
        <resource>
            <directory>${log4j.properties.directory}</directory>
            <includes>
                <include>log4j.properties</include>
            </includes>
        </resource>
    </resources>
</build>

Now, in your /Users/junger/.m2/settings.xml (create one if it doesn't exist):

<profiles>
    <profile>
        <id>dev</id>
        <activation>
            <activeByDefault>true</activeByDefault>
        </activation>
        <properties>
            <log4j.properties.directory>/Users/devuser/.m2/</log4j.properties.directory>
        </properties>
    </profile>
</profile>

By using this method, each developer can have a different log4j.properties directory and you keep your pom.xml clean.