在m% 或者 t% 等出现需要转义字符时处理
实例：
### direct log messages to stdout ###log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.Target=System.outlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} %5p [%c]- %m%n### direct messages to file hibernate.log ####log4j.appender.file=org.apache.log4j.RollingFileAppender#log4j.appender.file.File=reportLog.log#log4j.appender.file.layout=org.apache.log4j.PatternLayout#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} %5p [%c]- %m%n#log4j.appender.file.MaxFileSize=5MB#log4j.appender.file.MaxBackupIndex=2### set log levels - for more verbose logging change 'info' to 'debug' ###log4j.rootLogger=info,stdout,db#log4j.logger.business=INFO,db #log4j.appender.db=com.neam.commons.MyJDBCAppender log4j.appender.db=com.yss.util.ReJDBCAppender log4j.appender.db.BufferSize=1log4j.appender.db.driver=${com.yss.db.driverClassName}log4j.appender.db.URL=${com.yss.zt.url}log4j.appender.db.user=${com.yss.zt.username}log4j.appender.db.password=${com.yss.zt.password}log4j.appender.db.sql=insert into RP_REPORTLOG(FLOW,USERNAME,REPORTCODE,REPORTDATE,LOGLEVEL,LOGMSG ,JCLASS ,JMETHOD ,ERRORTIME ) values (REPORTLOG.nextval,'%X{userName}','%X{reportCode}','%X{reportDate}','%p','%m','%M','%C','%d{yyyy-MM-dd HH:mm:ss}')log4j.appender.db.layout=org.apache.log4j.PatternLayout### log HQL query parser activity#log4j.logger.org.hibernate.hql.ast.AST=debug### log just the SQL#log4j.logger.org.hibernate.SQL=debug### log cache activity ####log4j.logger.org.hibernate.cache=debug### log transaction activity#log4j.logger.org.hibernate.transaction=debug### log JDBC resource #log4j.logger.org.hibernate.jdbc=debug