log4j log print mybatis

1 pom.xml add references: three must

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.7.25</version>
</dependency>
<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.17</version>
</dependency>
<dependency>
  <groupId>org.bgee.log4jdbc-log4j2</groupId>
  <artifactId>log4jdbc-log4j2-jdbc4.1</artifactId>
  <version>1.16</version>
</dependency>

2 设置mybatis的配置文件 mybatis-config.xml

<Settings> 
    <-! printing log to SLF4J -> 
    <Setting name = "logImpl" value = "the SLF4J"> </ Setting> 
</ Settings> 

. 3 log4j attribute is to be noted that the log level DEBUG, in particular of the following two, I did not pay attention to the INFO modified to DEBUG, do not print out the log

log4j.rootLogger=DEBUG,file
log4j.appender.file.Threshold=DEBUG