1. 在 Maven 中添加对 Log4j 的依赖在 pom.xml

      1. <dependency>
      2.  <groupId>log4j</groupId>
      3.  <artifactId>log4j</artifactId>
      4.  <version>1.2.17</version>
      5. </dependency>
      6. <dependency>
      7.  <groupId>org.slf4j</groupId>
      8.  <artifactId>slf4j-api</artifactId>
      9.  <version>1.7.25</version>
      10. </dependency>
      11. <dependency>
      12.  <groupId>org.slf4j</groupId>
      13.  <artifactId>slf4j-log4j12</artifactId>
      14.  <version>1.7.25</version>
      15.  <scope>test</scope>
      16. </dependency>
      17. <dependency>
      18.  <groupId>org.slf4j</groupId>
      19.  <artifactId>slf4j-simple</artifactId>
      20.  <version>1.7.25</version>
      21.  <scope>test</scope>
      22. </dependency>

    2. 配置 Log4j，在 resources/log4j.properties

      1. log4j.rootLogger=DEBUG,stdout
      2. log4j.appender.stdout=org.apache.log4j.ConsoleAppender
      3. log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
      4. log4j.appender.stdout.layout.ConversionPattern=[%p]%C{1}-%m%n