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> <groupI颊俄岿髭d>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-runas-runconfigurations,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
