Log4j配置方式

# ${webapp.root} : 日志文件存储到项目目录下 ${catalina.home} : 日志文件存储到Tomcat目录下

XML配置方式1

配置maxBackupIndex最大记录日志文件数为20，每个日志文件大小为10MB。将不同级别的日志信息保存到不同文件中：debug.log、info.log、warn.log、error.log等文件。

当日志文件数量达到20个之后，此种配置方式会覆盖重写第一个日志文件，将新的日志信息写到第一个日志文件，第一个写满后，重写第二个，按顺序循环进行。

log4j.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"><log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'><!-- 日志记录的优先级，由高到低为OFF, FITAL（致命）, ERROR（错误）, WARN（警告）, INFO（信息）, DEBUG（调试）, TRACE（跟踪）, ALL（全部）。 --><!-- 控制台标准输出日志 --><appender name="stdout" class="org.apache.log4j.ConsoleAppender"><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout></appender><!-- traceLog4Debug日志 --><appender name="traceLog4Debug" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/traceLog4Debug.log"/><param name="maxFileSize" value="10MB" /><param name="maxBackupIndex" value="20" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout></appender><!-- <appender name="allLog" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/all.log"/><param name="encoding" value="GBK" /><param name="maxFileSize" value="1MB" /><param name="maxBackupIndex" value="20" /><param name="threshold" value="ALL" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout></appender> --><!-- trace跟踪日志 --><appender name="traceLog" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/trace/trace.log"/><param name="encoding" value="GBK" /><param name="maxFileSize" value="10MB" /><param name="maxBackupIndex" value="20" /><param name="threshold" value="TRACE" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout><filter class="org.apache.log4j.varia.LevelRangeFilter"><param name="LevelMax" value="TRACE" /><param name="LevelMin" value="TRACE" /></filter></appender><!-- debug调试日志 --><appender name="debugLog" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/debug/debug.log"/><param name="encoding" value="GBK" /><param name="maxFileSize" value="10MB" /><param name="maxBackupIndex" value="20" /><param name="threshold" value="DEBUG" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout><!-- filter配置LevelMax、LevelMin限制输出到文件的日志级别 --><filter class="org.apache.log4j.varia.LevelRangeFilter"><param name="LevelMax" value="DEBUG" /><param name="LevelMin" value="DEBUG" /></filter></appender><!-- info信息日志 --><appender name="infoLog" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/info/info.log"/><param name="encoding" value="GBK" /><param name="maxFileSize" value="10MB" /><param name="maxBackupIndex" value="20" /><param name="threshold" value="INFO" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout><filter class="org.apache.log4j.varia.LevelRangeFilter"><param name="LevelMax" value="INFO" /><param name="LevelMin" value="INFO" />       </filter></appender><!-- warn警告日志 --><appender name="warnLog" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/warn/warn.log"/><param name="encoding" value="GBK" /><param name="maxFileSize" value="10MB" /><param name="maxBackupIndex" value="20" /><param name="threshold" value="WARN" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout><filter class="org.apache.log4j.varia.LevelRangeFilter"><param name="LevelMax" value="WARN" />         <param name="LevelMin" value="WARN" />       </filter></appender><!-- error错误日志 --><appender name="errorLog" class="org.apache.log4j.RollingFileAppender"><param name="File" value="${webapp.root}/logs1/error/error.log" /><param name="encoding" value="GBK" /><param name="maxFileSize" value="10MB" /><param name="maxBackupIndex" value="20" /><param name="threshold" value="ERROR" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout>    <filter class="org.apache.log4j.varia.LevelRangeFilter">        <param name="LevelMax" value="ERROR" />        <param name="LevelMin" value="ERROR" />    </filter></appender><!-- 记录该包下所有日志 --><logger name="com.yd"><level value="ALL"/><appender-ref ref="stdout" /><appender-ref ref="traceLog4Debug" /><!-- <appender-ref ref="allLog" /> --><appender-ref ref="traceLog" /><appender-ref ref="debugLog" /><appender-ref ref="infoLog" /><appender-ref ref="warnLog" /><appender-ref ref="errorLog" /></logger><logger name="org.hibernate.SQL"><level value="DEBUG" /><appender-ref ref="traceLog4Debug"/><appender-ref ref="stdout" /></logger><logger name="org.hibernate"><level value="error" /><appender-ref ref="traceLog4Debug"/><appender-ref ref="stdout" /></logger><logger name="org.springframework"><level value="error" /><appender-ref ref="traceLog4Debug" /><appender-ref ref="stdout" /></logger></log4j:configuration>

XML配置方式2

每天都会产生日志文件，用日期命名日志文件，日志文件没有大小和数量限制。

log4j.xml

<?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd"><log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/"><!-- 控制台STDOUT --><appender name="console" class="org.apache.log4j.ConsoleAppender"><param name="encoding" value="GBK" /><param name="target" value="System.out" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%-5p %c{2} - %m%n" /></layout></appender><!-- 公共Appender --><appender name="DEFAULT-APPENDER" class="org.apache.log4j.DailyRollingFileAppender"><param name="File" value="${webapp.root}/logs/common-default-today.log" /><param name="Append" value="true" /><param name="encoding" value="GBK" /><param name="DatePattern" value="'.'yyyy-MM-dd'.log'" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout></appender> <!-- 错误日志APPENDER --><appender name="ERROR-APPENDER" class="org.apache.log4j.DailyRollingFileAppender"><param name="File" value="${webapp.root}/logs/common-error.log" /><param name="Append" value="true" /><param name="encoding" value="GBK" /><param name="threshold" value="error" /><param name="DatePattern" value="'.'yyyy-MM-dd'.log'" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout></appender><!-- 组件日志APPENDER --><appender name="COMPONENT-APPENDER" class="org.apache.log4j.DailyRollingFileAppender"><param name="File" value="${webapp.root}/logs/logistics-component.log" /><param name="Append" value="true" /><param name="encoding" value="GBK" /><param name="DatePattern" value="'.'yyyy-MM-dd'.log'" /><layout class="org.apache.log4j.PatternLayout"><param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" /></layout></appender><!-- 组件日志 --><logger name="LOGISTICS-COMPONENT"><level value="INFO" /><appender-ref ref="COMPONENT-APPENDER" /><appender-ref ref="ERROR-APPENDER" /></logger><!-- Root Logger --><root><!-- 日志记录的优先级，由高到低为OFF, FITAL（致命）, ERROR（错误）, WARN（警告）, INFO（信息）, DEBUG（调试）, TRACE（跟踪）, ALL（全部）。 --><level value="DEBUG" /> <appender-ref ref="DEFAULT-APPENDER" /><appender-ref ref="ERROR-APPENDER" /><appender-ref ref="console" /><appender-ref ref="DEFAULT-APPENDER" /></root></log4j:configuration>

properties配置方式1

log4j.properties

log4j.rootLogger=info,A1,console,Dlog4j.appender.A1=org.apache.log4j.DailyRollingFileAppender log4j.appender.A1.Threshold=infolog4j.appender.A1.Append=true log4j.appender.A1.File=${catalina.home}/system/logs/info/xymgr_info_log4j.log log4j.appender.A1.DatePattern = '.'yyyy-MM-dd'.log' log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=[%-5p] %X{userid} %X{ip} %d{yyyy-MM-dd HH\:mm\:ss}  Method\: %l%n%m%n log4j.appender.console=org.apache.log4j.ConsoleAppenderlog4j.appender.console.Threshold=infolog4j.appender.console.layout=org.apache.log4j.PatternLayoutlog4j.appender.console.layout.ConversionPattern=---[%-5p] %X{userid} %X{ip} %d{yyyy-MM-dd HH\:mm\:ss} \: %m class\:[%c] %nlog4j.appender.D = org.apache.log4j.DailyRollingFileAppenderlog4j.appender.D.File = ${catalina.home}/system/logs/error/xymgr_error_log4j.log log4j.appender.D.Append = truelog4j.appender.D.Threshold = ERRORlog4j.appender.D.layout = org.apache.log4j.PatternLayoutlog4j.appender.D.layout.ConversionPattern =[%-5p] %-d{yyyy-MM-dd HH:mm:ss} %X{userid} %X{ip} [ %t:%r ] - [ %p ]  %m%n%l%nlog4j.logger.org.springframework=INFOlog4j.logger.com.wenyuan.sms=INFO

新新：http://blog.csdn.net/xinxin19881112/article/details/46833693