放置src目录下

log4j.properties

Global logging configuration
log4j.rootLogger=DEBUG, stdout
#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
\u518D\u6B21\u8FD0\u884C\uFF1A
DEBUG [main] - ooo Using Connection [com.mysql.jdbc.JDBC4Connection@17671]
DEBUG [main] - ==> Preparing: select * from user
DEBUG [main] - ==> Parameters: