1. First enter the dependency in pom.xml, the code is as follows <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>
2. Create log4j.properties under the resources file and enter the following code
### set log levels ### log4j.rootLogger = DEBUG,console,file ### Output to console ### log4j.appender.console = org.apache.log4j.ConsoleAppender log4j.appender.console.Target = System.out log4j.appender.console.Threshold = DEBUG log4j.appender.console.layout = org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern = [%c]-%m%n ### Output to log file ### log4j.appender.file=org.apache.log4j.RollingFileAppender log4j.appender.file.File=./log/hou.log log4j.appender.file.MaxFileSize=10mb log4j.appender.file.Threshold=DEBUG log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%n # log output level log4j.logger.org.mybatis=DEBUG log4j.logger.java.sql=DEBUG log4j.logger.java.sql.Statement=DEBUG log4j.logger.java.sql.ResultSet=DEBUG log4j.logger.java.sql.PreparedStatement=DEBUG
3. Write the following code in mybatis-config.xml
<settings> <setting name="logImpl" value="LOG4J"/> </settings>
Finally, run it and see the log in the console.
After running, a log package will be automatically generated, in which you can view all operation logs