1，添加log4j.properties

Global logging configuration

log4j.rootLogger=DEBUG, logDB

Console output...

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

mysql

log4j.appender.logDB=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.logDB.driver=com.mysql.jdbc.Driver
log4j.appender.logDB.URL=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
log4j.appender.logDB.user=root
log4j.appender.logDB.password=123456
log4j.appender.logDB.sql=insert into log(create_time,logs) VALUES ('%d{yyyy-MM-dd hh:mm:ss}', '%c %p %l')
log4j.appender.logDB.layout=org.apache.log4j.PatternLayout