log4j分级 分文件配置

# to info file
log4j.rootLogger=INFO,R_INFO,R_ERROR
log4j.appender.R_INFO=org.apache.log4j.RollingFileAppender
log4j.appender.R_INFO.File=info.log
log4j.appender.R_INFO.layout=org.apache.log4j.PatternLayout
log4j.appender.R_INFO.layout.ConversionPattern=[%t] (%F,%L) %d{yyyy-MM-dd HH:mm:ss,SSS}  %m%n
log4j.appender.R_INFO.MaxFileSize=50000KB
log4j.appender.R_INFO.MaxBackupIndex=90

# to error file
log4j.appender.R_ERROR=org.apache.log4j.RollingFileAppender
log4j.appender.R_ERROR.file=error.log
log4j.appender.R_ERROR.Threshold=ERROR
log4j.appender.R_ERROR.MaxFileSize=50000KB
log4j.appender.R_ERROR.MaxBackupIndex=20
log4j.appender.R_ERROR.layout=org.apache.log4j.PatternLayout
log4j.appender.R_ERROR.layout.ConversionPattern=[%t] (%F,%L) %d{yyyy-MM-dd HH:mm:ss,SSS}  %m%n