附：Log4j比较全面的配置

Log4j配置文件实现了输出到控制台、文件、回滚文件、发送日志邮件、输出到数据库日志表、自定义标签等全套功能。

log4j.rootLogger=DEBUG,console,dailyFile,im

log4j.additivity.org.apache=true

# 控制台(console)

log4j.appender.console=org.apache.log4j.ConsoleAppender

log4j.appender.console.Threshold=DEBUG

log4j.appender.console.ImmediateFlush=true

log4j.appender.console.Target=System.err

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

log4j.appender.console.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n

# 日志文件(logFile)

log4j.appender.logFile=org.apache.log4j.FileAppender

log4j.appender.logFile.Threshold=DEBUG

log4j.appender.logFile.ImmediateFlush=true

log4j.appender.logFile.Append=true

log4j.appender.logFile.File=D:/logs/log.log4j

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

log4j.appender.logFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n

# 回滚文件(rollingFile)

log4j.appender.rollingFile=org.apache.log4j.RollingFileAppender

log4j.appender.rollingFile.Threshold=DEBUG

log4j.appender.rollingFile.ImmediateFlush=true

log4j.appender.rollingFile.Append=true

log4j.appender.rollingFile.File=D:/logs/log.log4j

log4j.appender.rollingFile.MaxFileSize=200KB

log4j.appender.rollingFile.MaxBackupIndex=50

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

log4j.appender.rollingFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n

# 定期回滚日志文件(dailyFile)

log4j.appender.dailyFile=org.apache.log4j.DailyRollingFileAppender

log4j.appender.dailyFile.Threshold=DEBUG

log4j.appender.dailyFile.ImmediateFlush=true

log4j.appender.dailyFile.Append=true

log4j.appender.dailyFile.File=D:/logs/log.log4j

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

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

log4j.appender.dailyFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %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 Factor 5

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

log4j.appender.socket.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n

# Log Factor 5 Appender

log4j.appender.LF5_APPENDER=org.apache.log4j.lf5.LF5Appender

log4j.appender.LF5_APPENDER.MaxNumberOfRecords=2000

# 发送日志到指定邮件

log4j.appender.mail=org.apache.log4j.net.SMTPAppender

log4j.appender.mail.Threshold=FATAL

log4j.appender.mail.BufferSize=10

log4j.appender.mail.From = xxx@mail.com

log4j.appender.mail.SMTPHost=mail.com

log4j.appender.mail.Subject=Log4J Message

log4j.appender.mail.To= xxx@mail.com

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

log4j.appender.mail.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n

# 应用于数据库

log4j.appender.database=org.apache.log4j.jdbc.JDBCAppender

log4j.appender.database.URL=jdbc:mysql://localhost:3306/test

log4j.appender.database.driver=com.mysql.jdbc.Driver

log4j.appender.database.user=root

log4j.appender.database.password=

log4j.appender.database.sql=INSERT INTO LOG4J (Message) VALUES('=[%-5p] %d(%r) --> [%t] %l: %m %x %n')

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

log4j.appender.database.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %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 = corlin@cybercorlin.net

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

log4j.appender.im.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n