Simple use of Log4J (combined with online content organization)

Log4J configuration file example

ConversionPattern参数的格式含义
%c 输出日志信息所属的类的全名
%d 输出日志时间点的日期或时间，默认格式为ISO8601，也可以在其后指定格式，比如：%d{yyy-MM-dd HH:mm:ss }
%f 输出日志信息所属的类的类名
%l 输出日志事件的发生位置，即输出日志信息的语句处于它所在的类的第几行
%m 输出代码中指定的信息，如log(message)中的message
%n 输出一个回车换行符，Windows平台为“rn”，Unix平台为“n”
%p 输出优先级，即DEBUG，INFO，WARN，ERROR，FATAL.
%r 输出自应用启动到输出该日志信息所耗费的毫秒数
%t 输出产生该日志事件的线程名
######################################################## 
log4j.rootLogger=DEBUG,CONSOLE,A1,FILE
log4j.addivity.org.apache=true
#应用于控制台
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=DEBUG
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.Encoding=gbk
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%-5p] %c{1}(%t):%L-%m%n
#每天新建日志(文件不会被覆盖)
log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.File=D:/log4j/log.log
log4j.appender.A1.Encoding=gbk
log4j.appender.A1.Threshold=DEBUG
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%-5p] %c{1}(%t):%L-%m%n
#应用于文件(当前调用,文件会被覆盖)
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=D:/log4j/file.log
log4j.appender.FILE.Append=false
log4j.appender.FILE.Encoding=gbk
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%-5p] %c{1}(%t):%L-%m%n

# 应用于文件回滚 
log4j.appender.ROLLING_FILE=org.apache.log4j.RollingFileAppender 
log4j.appender.ROLLING_FILE.Threshold=ERROR 
log4j.appender.ROLLING_FILE.File=rolling.log 
log4j.appender.ROLLING_FILE.Append=true
log4j.appender.CONSOLE_FILE.Encoding=gbk 
log4j.appender.ROLLING_FILE.MaxFileSize=10KB 
log4j.appender.ROLLING_FILE.MaxBackupIndex=1
log4j.appender.ROLLING_FILE.layout=org.apache.log4j.PatternLayout 
log4j.appender.ROLLING_FILE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n 

#自定义Appender 
log4j.appender.im = net.cybercorlin.util.logger.appender.IMAppender 
log4j.appender.im.host = mail.cybercorlin.net 
log4j.appender.im.username = username 
log4j.appender.im.password = password 
log4j.appender.im.recipient [email protected] 
log4j.appender.im.layout=org.apache.log4j.PatternLayout 
log4j.appender.im.layout.ConversionPattern =[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n 

#应用于socket 
log4j.appender.SOCKET=org.apache.log4j.RollingFileAppender 
log4j.appender.SOCKET.RemoteHost=localhost 
log4j.appender.SOCKET.Port=5001
log4j.appender.SOCKET.LocationInfo=true
# Set up for Log Facter 5
log4j.appender.SOCKET.layout=org.apache.log4j.PatternLayout 
log4j.appender.SOCET.layout.ConversionPattern=[start]%d{DATE}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD]%n%c[CATEGORY]%n%m[MESSAGE]%n%n 
# Log Factor 5 Appender 
log4j.appender.LF5_APPENDER=org.apache.log4j.lf5.LF5Appender 
log4j.appender.LF5_APPENDER.MaxNumberOfRecords=2000

# 发送日志给邮件 
log4j.appender.MAIL=org.apache.log4j.net.SMTPAppender 
log4j.appender.MAIL.Threshold=FATAL 
log4j.appender.MAIL.BufferSize=10
[email protected] 
log4j.appender.MAIL.SMTPHost=www.wusetu.com 
log4j.appender.MAIL.Subject=Log4J Message 
[email protected] 
log4j.appender.MAIL.layout=org.apache.log4j.PatternLayout 
log4j.appender.MAIL.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n

log4j.rootLogger=DEBUG,CONSOLE,FILE
log4j.addivity.org.apache=true

log level

DEBUG points out that fine-grained informational events are very helpful for debugging applications.
INFO indicates that the message highlights the operation of the application at a coarse-grained level.
WARN indicates a potentially erroneous situation.
ERROR indicates that although an error event occurs, it still does not affect the continued operation of the system.
FATAL indicates that every serious error event will cause the application to exit.
The priority from high to low is ERROR, WARN, INFO, DEBUG.

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