解决log4j2配置不起作用

1、所有的配置都正确，启动项目，发现log4j加载失败

2、在poi的build标签下添加一段代码

<plugins>

<plugin>

<groupId>org.basepom.maven</groupId>

<artifactId>duplicate-finder-maven-plugin</artifactId>

<version>1.1.0</version>

<executions>

<execution>

<id>default</id>

<phase>verify</phase>

<goals>

<goal>check</goal>

</goals>

</execution>

</executions>

<configuration>

<skip>false</skip>

<quiet>false</quiet>

<checkCompileClasspath>true</checkCompileClasspath>

<checkRuntimeClasspath>true</checkRuntimeClasspath>

<checkTestClasspath>true</checkTestClasspath>

<failBuildInCaseOfDifferentContentConflict>false</failBuildInCaseOfDifferentContentConflict>

<failBuildInCaseOfEqualContentConflict>false</failBuildInCaseOfEqualContentConflict>

<failBuildInCaseOfConflict>false</failBuildInCaseOfConflict>

<printEqualFiles>false</printEqualFiles>

<preferLocal>true</preferLocal>

<!-- Version 1.1.1+ -->

<includeBootClasspath>false</includeBootClasspath>

<bootClasspathProperty>sun.boot.class.path</bootClasspathProperty>

<!-- Version 1.1.1+ -->

<!-- Version 1.2.0+ -->

<includePomProjects>false</includePomProjects>

<!-- Version 1.2.0+ -->

</configuration>

</plugin>

</plugins>

3、然后在项目上右键-run as-run configurations,找到maven，右键，新建

4、分别输入名称和地址

5、在goals中输入duplicate-finder:check

6、点击apply-run，在控制台我们看到了有冲突的包以及冲突类 

7、activemq包里与log4j的api冲突，我们删除activemq，换用无冲突的依赖包

8、再次启动项目，哈哈，可以看到日志信息出来了