siftappender logback_consoleappender_fileappender rollover

pender.appenderName.layout.option = valueN

Log4j提供的layout有以下几种：

org.apache.log4j.HTMLLayout（以HTML表格形式布局），

org.apache.log4j.PatternLayout（可以灵活地指定布局模式），

org.apache.log4j.SimpleLayout（包含日志信息的级别和信息字符串），

org.apache.log4j.TTCCLayout（包含日志产生的时间、线程、类别等等信息）

例子1：

#log4j.rootLogger = [ level ] , appenderName, appenderName, …

log4j.rootLogger=INFO, A1 ,R

#这一句设置以为着所有的log都输出

#如果为log4j.rootLogger=WARN,则意味着只有WARN,ERROR,FATAL被输出，DEBUG,INFO将被屏蔽掉.

# A1 is set to be a ConsoleAppender.

#log4j中Appender有几层如控制台、文件、GUI组件、甚至是套接口服务器、NT的事件记录器、UNIXSyslog守护进程等

#ConsoleAppender输出到控制台

log4j.appender.A1=org.apache.log4j.ConsoleAppender

# A1 使用的输出布局

log4j.appender.A1.layout=org.apache.log4j.PatternLayout

#灵活定义输出格式 具体查看log4j javadoc org.apache.log4j.PatternLayout

#d 时间 ....

log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss}[%c]-[%p] %m%n

#R 输出到文件 RollingFileAppender的扩展，可以提供一种日志的备份功能。

log4j.appender.R=org.apache.log4j.RollingFileAppender

#日志文件的名称

log4j.appender.R.File=log4j.log

#日志文件的大小

log4j.appender.R.MaxFileSize=100KB

# 保存一个备份文件

log4j.appender.R.MaxBackupIndex=1

log4j.appender.R.layout=org.apache.log4j.TTCCLayout

log4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss}[%c]-[%p] %m%n

例子2 ：

# log4j.properties

# Set root category priority to DEBUG and its only appender toA1.

# 设置com.ccit域对应的级别DEBUG和输出地A1，A2

log4j.category.com.ccit=DEBUG,A1,A2

log4j.appender.A2=org.apache.log4j.ConsoleAppender

log4j.appender.A2.layout=org.apache.log4j.PatternLayout

log4j.appender.A2.Encoding=ISO-8859-1

log4j.appender.A2.layout.ConversionPattern=%5p [%t] (%F:%L) -%m%n

log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender

log4j.appender.A1.DatePattern='.'yyyy-MM-dd

log4j.appender.A1.Encoding=ISO-8859-1

log4j.appender.A1.File=log/server.log

log4j.appender.A1.layout=org.apache.log4j.PatternLayout

log4j.appender.A1.layout.ConversionPattern=%d %5p [%t] (%F:%L) -%m%n

java文件中初始化log4j配置：

String dir = System.getProperty('user.dir'); // 获得当前程序所在路径

System.out.println('log4j = ' + dir +'/conf/log4j.properties');

// 初始化log4j org.apache.log4j.PropertyConfigurator

PropertyConfigurator.configure('./conf/log4j.properties');

读取配置文件的三种方法：

//自动快速地使用缺省Log4j环境。fileappender rolloverfileappender rollover

BasicConfigurator.configure ();

//读取使用Java的特性文件编写的配置文件

PropertyConfigurator.configure ( String configFilename);

//读取XML形式的配置文件

DOMConfigurator.configure ( String filename );

日志级别分离

一、 Tomcat日志分离

修改war包中的log4j.properties文件

增加红色字体的配置信息（两处修改）：

# Set root category priority to DEBUG and its only appender toA1.

#log4j.rootCategory=DEBUG, A1

#add a root category named 'f2'

log4j.rootCategory=INFO, stdout,f1,f2

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

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

log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd} %5p[%t] (%F:%L) - %m%n

# Pattern to output the caller's file name and line number.

log4j.appender.f1=org.apache.log4j.DailyRollingFileAppender

log4j.appender.f1.File=../logs/raweb.log

log4j.appender.f1.layout=org.apache.log4j.PatternLayout

log4j.appender.f1.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss}%5p (%F:%L) - %m%n

#set information level to 'ERROR'

log4j.appender.f2=org.apache.log4j.DailyRollingFileAppender

log4j.appender.f2.Threshold=ERROR

log4j.appender.f2.File=../logs/raweb_error.log

log4j.appender.f2.layout=org.apache.log4j.PatternLayout

log4j.appender.f2.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss}%5p (%F:%L) - %m%n

二、 Jboss日志分离

修改jboss-4.2.3.GA\server\default\conf jboss-log4j.xml文件

增加红色字体的配置信息（两处修改）：

<?xml version='1.0' encoding='UTF-8'?>

<!DOCTYPE log4j:configuration SYSTEM 'log4j.dtd'>

<!--=====================================================================-->

<!-- -->

<!-- Log4j Configuration -->

<!-- -->

<!--=====================================================================-->

<!-- $Id: jboss-log4j.xml 75507 2008-07-08 20:15:07Zstan.silvert@jboss.com $ -->

<!--

| For more configuration infromation and examples see the JakartaLog4j

| owebsite:

-->

<log4j:configurationxmlns:log4j='http://jakarta.apache.org/log4j/'debug='false'>

<!-- ================================= -->

<!-- Preserve messages in a local file -->

<!-- ================================= -->

<!-- A time/date based rolling appender -->

<appender>

<errorHandler/>

<paramvalue='${jboss.server.log.dir}/server.log'/>

<param value='false'/>

<!-- Rollover at midnight each day -->

<param value=''.'yyyy-MM-dd'/>

<!-- Rollover at the top of each hour

<param value=''.'yyyy-MM-dd-HH'/>

-->

<layout>

<!-- The default pattern: Date Priority [Category] Message\n-->

<param value='%d %-5p [%c]%m%n'/>

<!-- The full pattern: Date MS Priority [Category] (Thread:NDC)Message\n

<param value='%d %-5r %-5p [%c] (%t:%x)%m%n'/>

-->

</layout>

</appender>

<appender>

<errorHandler/>

<paramvalue='${jboss.server.log.dir}/server_error.log'/>

<param value='false'/>

<param value='ERROR'/>

<!-- Rollover at midnight each day -->

<param value=''.'yyyy-MM-dd'/>

<!-- Rollover at the top of each hour

<param value=''.'yyyy-MM-dd-HH'/>

-->

<layout>

<!-- The default pattern: Date Priority [Category] Message\n-->

<param value='%d %-5p [%c]%m%n'/>

<!-- The full pattern: Date MS Priority [Category] (Thread:NDC)Message\n

<param value='%d %-5r %-5p [%c] (%t:%x)%m%n'/>

-->

</layout>

</appender>

<!-- A size based file rolling appender

<appender>

<errorHandler/>

<paramvalue='${jboss.server.log.dir}/server.log'/>

<param value='false'/>

<param value='500KB'/>

<param value='1'/>

<layout>

<param value='%d %-5p [%c]%m%n'/>

</layout>

</appender>

-->

<!-- ============================== -->

<!-- Append messages to the console -->

<!-- ============================== -->

<appender>

<errorHandler/>

<param value='System.out'/>

<param value='INFO'/>

<layout>

<!-- The default pattern: Date Priority [Category] Message\n-->

<param value='%d{ABSOLUTE} %-5p [%c{1}]%m%n'/>

</layout>

</appender>

<!-- ====================== -->

<!-- More Appender examples -->

<!-- ====================== -->

<!-- Buffer events and log them asynchronously

<appender>

<errorHandler/>

<appender-ref ref='FILE'/>

<appender-ref ref='CONSOLE'/>

<appender-ref ref='SMTP'/>

</appender>

-->

<!-- EMail events to an administrator

<appender>

<errorHandler/>

<param value='ERROR'/>

<param value='admin@myhost.domain.com'/>

<param value='nobody@myhost.domain.com'/>

<param value='JBoss Sever Errors'/>

<param value='localhost'/>

<param value='10'/>

<layout>

<param value='[%d{ABSOLUTE},%c{1}]%m%n'/>

</layout>

</appender>

-->

<!-- Syslog events

<appender>

<errorHandler/>

<param value='LOCAL7'/>

<param value='true'/>

<param value='localhost'/>

<layout>

<param value='[%d{ABSOLUTE},%c{1}]%m%n'/>

</layout>

</appender>

-->

<!-- Log events to JMS (requires a topic to be created)

<appender>

<errorHandler/>

<param value='ERROR'/>

<paramvalue='java:/ConnectionFactory'/>

<paramvalue='topic/MyErrorsTopic'/>

</appender>

-->

<!-- Log events through SNMP

<appender>

<errorHandler/>

<paramvalue='org.apache.log4j.ext.JoeSNMPTrapSender'/>

<param value='127.0.0.1'/>

<paramvalue='162'/>

<param value='1.3.6.1.4.1.24.0'/>

<param value='127.0.0.1'/>

<param value='161'/>

<param value='6'/>

<param value='12345678'/>

<param value='public'/>

<param value='true'/>

<param value='DEBUG'/>

<paramvalue='1.3.6.1.4.1.24.12.10.22.64'/>

<layout>

<paramvalue='%d,%p,[%t],[%c],%m%n'/>

</layout>

</appender>

-->

<!-- Emit events as JMX notifications

<appender>

<errorHandler/>

<param value='WARN'/>

<paramvalue='jboss.system:service=Logging,type=JMXNotificationAppender'/>

<layout>

<param value='%d %-5p [%c]%m'/>

</layout>

</appender>

-->

<!-- ================ -->

<!-- Limit categories -->

<!-- ================ -->

<!-- Limit the org.apache category to INFO as its DEBUG isverbose -->

<category>

<priority value='INFO'/>

</category>

<!-- Limit the jacorb category to WARN as its INFO is verbose-->

<category>

<priority value='WARN'/>

</category>

<!-- Limit the org.jgroups category to WARN as its INFO isverbose -->

<category>

<priority value='WARN'/>

</category>

<!-- Limit the org.quartz category to INFO as its DEBUG isverbose -->

<category>

<priority value='INFO'/>

</category>

<!-- Limit JSF logging to DEBUG. FINER and FINEST will not belogged -->

<category>

<priority value='DEBUG' />

</category>

<!-- Limit JBoss categories

<category>

<priority value='INFO'/>

</category>

-->

<!-- Limit the JSR77 categories -->

<category>

<priority value='INFO'/>

</category>

<!-- Show the evolution of the DataSource pool in the logs[inUse/Available/Max]

<category>

<priority value='TRACE'/>

</category>

-->

<!-- Limit the org.jboss.serial (jboss-serialization) to INFO asits DEBUG is verbose -->

<category>

<priority value='INFO'/>

</category>

<!-- Decrease the priority threshold for the org.jboss.variacategory

<category>

<priority value='DEBUG'/>

</category>

-->

<!-- Enable JBossWS message tracing

<category>

<priority value='TRACE'/>

</category>

-->

<!--

| An example of enabling the custom TRACE level priority that isused

| by the JBoss internals to diagnose low level details. Thiample

| turns on TRACE level msgs for the org.jboss.ejb.plugins packageand its

| subpackages. This will produce A LOT of logging output.

|

| Note: since jboss AS 4.2.x, the trace level is supported nativelyby

| log4j, so although the custom org.jboss.logging.XLevel prioritywill

| still work, there is no need to use it. The two examples thatfollow

| will both enable trace logging.

<category>

<priority value='TRACE'/>

</category>

<category>

<priority value='TRACE'/>

</category>

-->

<!--

| Logs these events to SNMP:

- server starts/stops

- cluster evolution (node death/startup)

- When an EJB archive is deployed (and associated verifiedmessages)

- When an EAR archive is deployed

<category>

<priority value='INFO' />

<appender-ref ref='TRAP_LOG'/>

</category>

<category>

<priority value='INFO' />

<appender-ref ref='TRAP_LOG'/>

</category>

<category>

<priority value='ERROR' />

<appender-ref ref='TRAP_LOG'/>

</category>

<category>

<priority value='INFO' />

<appender-ref ref='TRAP_LOG'/>

</category>

<category>

<priority value='INFO' />

<appender-ref ref='TRAP_LOG'/>

</category>

-->

<!-- Clustering logging -->

<!-- Uncomment the following to redirect the org.jgroupsand

org.jboss.ha categories to a cluster.log file.

<appender>

<errorHandler/>

<paramvalue='${jboss.server.log.dir}/cluster.log'/>

<param value='false'/>

<param value='500KB'/>

<param value='1'/>

<layout>

<param value='%d %-5p [%c]%m%n'/>

</layout>

</appender>

<category>

<priority value='DEBUG' />

<appender-ref ref='CLUSTER'/>

</category>

<category>

<priority value='DEBUG' />

<appender-ref ref='CLUSTER'/>

</category>

-->

<!-- ======================= -->

<!-- Setup the Root category -->

<!-- ======================= -->

<root>

<appender-ref ref='CONSOLE'/>

<appender-ref ref='FILE'/>

<appender-ref ref='ERRORFILE'/>

</root>

</log4j:configuration>

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