1.新增log4j相應jar包：

<!-- 日誌檔案管理包 --> 
    <dependency>  
          <groupId>log4j</groupId>  
          <artifactId>log4j</artifactId>  
           <version>${log4j.version}</version>  
     </dependency> 
    <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-api</artifactId>  
            <version>${slf4j.version}</version>  
      </dependency>  
      <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-log4j12</artifactId>  
            <version>${slf4j.version}</version> 
    </dependency>
 

2.配置log4j.properties檔案

log4j.rootLogger=INFO,stdout
# Log everything. Good for troubleshooting
log4j.logger.org.hibernate=INFO
# Log all JDBC parameters
log4j.logger.org.hibernate.type=ALL


log4j.logger.log4jdbc.debug=ERROR
log4j.logger.com.gk.mapper=ERROR

log4j.logger.jdbc.audit=ERROR
log4j.logger.jdbc.resultset=ERROR

log4j.logger.jdbc.sqlonly=DEBUG
log4j.logger.jdbc.sqltiming=ERROR
log4j.logger.jdbc.connection=FATAL

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %5p %c{1}:%L - %m%n
 

3.在application.properties中宣告log4j.properties.

logging.config=classpath:log4j.properties

log4j.properties 中相關知識點

請參考：https://www.cnblogs.com/ITEagle/archive/2010/04/23/1718365.html