记录一下log4j使用

1.导入本地maven仓管库的log4j的jar包

2.配置log4j.properties文件（还有一种配置xml文件的待测··）

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log4j.properties:

log4j.rootLogger=...............................

log4j.logger.包名=info,R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender       //控制台输出log日志

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=.............................................................

log4j.appender.stdout.Encoding=UTF-8

log4j.appender.R=org.apache.log4j.DailyRollingFileAppender   //每天记录

log4j.appender.R.File=../logs/文件名1.log                                          //项目所在的project location的logs文件夹下的“文件名.log”  用以存放记录

log4j.appender.R.DatePattern='.'yyyy-MM-dd

log4j.appender.R.layout=org.apache.log4j.PatternLayout

log4j.appender.R.layout.ConversionPattern=·················································

//打印sql语句 及参数

log4j.logger.com.ibatis=error,sql

log4j.appender.sql=org.apache.log4j.DailyRollingFileAppender

log4j.appender.sql.File=../logs/文件名2.log     //打印sql语句的地方

log4j.appender.sql.DatePattern='.'yyyy-MM-dd

log4j.appender.sql.layout=org.apache.log4j.PatternLayout

log4j.appender.sql.layout.ConversionPattern=.....................................................................

log4j.logger.java.sql.Connection=DEBUG                                                                                       √

log4j.logger.java.sql.Statement=DEBUG                                                                                          √

log4j.logger.java.sql.PreparedStatement=DEBUG                                                                         √

log4j.logger.java.sql.ResultSet=DEBUG                                                                                           √