1、在工程中引入log4j-1.2.12.jar和commons-logging.jar.
commons-logging.jar的版本为1.0.3,低版本的配置稍有不同
2、在WEB-INF\classes目录下新建commons-logging.properties文件,文件内容如下:
org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger
此行将log实现指定为Log4j
3、在WEB-INF\classes目录下新建log4j.properties文件,简单的配置文件示例如下:
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/classes/log4j.properties</param-value>
</context-param>
<context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>60000</param-value>
</context-param>
注意一:在上述实现类中也可以选用Log4JCategoryLog,但是会出现一些异常:FAIL - Encountered exception java.lang.NoSuchMethodError:org.apache.log4j.Category.log(****)
原因:commons-logger.jar和你的log4j.jar版本不兼容。前者是对后者的一个封装,而hibernate中主要是使用前者。前者的功能就是:它封装了一些通常的日志类,比如log4j,java.util.logging.Logger 等,使用的log4j,但是由于版本不对,commons-logger中用了log4j中的那个类,在当前的log4j版本中已经不存在了,所以报错
解决方法:将class目录下commons-logging.properties
org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JCategoryLog
更改为
org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger
注意二:在配置过程中我log4j.properties放于WEB-INF目录下,并修改相应的log4jConfigLocation,结果没有成功,不过用上述的配置没有问题
注意三:在配置输出路径时由于粗心写成如下:
log4j.appender.file.File=D:\log.log
没有看到任何结果,后来发现路径写错拉,这点要注意啊,呵呵
log4j.appender.file.File=D:/log.log
网友例一:功能比较多
LOG4J的配置之简单使它遍及于越来越多的应用中了: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。择其一二使用就够用了,
log4j.rootLogger
=
DEBUG
,
CONSOLE
,
A1
,
im
log4j.addivity.org.apache
=
true
#应用于控制台
log4j.appender.CONSOLE
=
org.apache.log4j.ConsoleAppender
log4j.appender.Threshold
=
DEBUG
log4j.appender.CONSOLE.Target
=
System.out
log4j.appender.CONSOLE.layout
=
org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern
=
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%n
#log4j.appender.CONSOLE.layout.ConversionPattern
=
[
start
]
%d{DATE}
[
DATE
]
%n%p
[
PRIORITY
]
%n%x
[
NDC
]
%n%t
[
THREAD
]
n%c
[
CATEGORY
]
%n%m
[
MESSAGE
]
%n%n
#应用于文件
log4j.appender.FILE
=
org.apache.log4j.FileAppender
log4j.appender.FILE.File
=
file.log
log4j.appender.FILE.Append
=
false
log4j.appender.FILE.layout
=
org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern
=
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%n
#UsethislayoutforLogFactor
5
analysis
#应用于文件回滚
log4j.appender.ROLLING_FILE
=
org.apache.log4j.RollingFileAppender
log4j.appender.ROLLING_FILE.Threshold
=
ERROR
log4j.appender.ROLLING_FILE.File
=
rolling.log
log4j.appender.ROLLING_FILE.Append
=
true
log4j.appender.ROLLING_FILE.MaxFileSize
=
10KB
log4j.appender.ROLLING_FILE.MaxBackupIndex
=
1
log4j.appender.ROLLING_FILE.layout
=
org.apache.log4j.PatternLayout
log4j.appender.ROLLING_FILE.layout.ConversionPattern
=
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%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
#SetupforLogFacter
5
log4j.appender.SOCKET.layout
=
org.apache.log4j.PatternLayout
log4j.appender.SOCET.layout.ConversionPattern
=
[
start
]
%d{DATE}
[
DATE
]
%n%p
[
PRIORITY
]
%n%x
[
NDC
]
%n%t
[
THREAD
]
%n%c
[
CATEGORY
]
%n%m
[
MESSAGE
]
%n%n
#LogFactor
5
Appender
log4j.appender.LF5_APPENDER
=
org.apache.log4j.lf5.LF5Appender
log4j.appender.LF5_APPENDER.MaxNumberOfRecords
=
2000
#发送日志给邮件
log4j.appender.MAIL
=
org.apache.log4j.net.SMTPAppender
log4j.appender.MAIL.Threshold
=
FATAL
log4j.appender.MAIL.BufferSize
=
10
log4j.appender.MAIL.From
=
[email protected]
log4j.appender.MAIL.SMTPHost
=
www.wusetu.com
log4j.appender.MAIL.Subject
=
Log4JMessage
log4j.appender.MAIL.To
=
[email protected]
log4j.appender.MAIL.layout
=
org.apache.log4j.PatternLayout
log4j.appender.MAIL.layout.ConversionPattern
=
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%n
#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
=
INSERTINTOLOG4J(Message)VALUES('
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%n')
log4j.appender.DATABASE.layout
=
org.apache.log4j.PatternLayout
log4j.appender.DATABASE.layout.ConversionPattern
=
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%n
log4j.appender.A1
=
org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.File
=
SampleMessages.log4j
log4j.appender.A1.DatePattern
=
yyyyMMdd-HH'.log4j'
log4j.appender.A1.layout
=
org.apache.log4j.xml.XMLLayout
#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
=
[email protected]
log4j.appender.im.layout
=
org.apache.log4j.PatternLayout
log4j.appender.im.layout.ConversionPattern
=
[
framework
]
%d-%c-%-4r
[
%t
]
%-5p%c%x-%m%n
网友例二:比较实用
#root输出源配置
log4j.rootLogger
=
DEBUG
,
rootlog
log4j.appender.rootlog
=
org.apache.log4j.RollingFileAppender
log4j.appender.rootlog.MaxFileSize
=
50000KB
log4j.appender.rootlog.MaxBackupIndex
=
0
log4j.appender.rootlog.file
=
D:/jakarta-tomcat-
4.1.30
/webapps/ROOT/logs/all.log
log4j.appender.rootlog.layout
=
org.apache.log4j.PatternLayout
log4j.appender.rootlog.layout.ConversionPattern
=
%d%-5p%m%n
#debug输出源配置
log4j.logger.debuglog
=
DEBUG
,
debuglog
log4j.appender.debuglog
=
org.apache.log4j.RollingFileAppender
log4j.appender.debuglog.MaxFileSize
=
50000KB
log4j.appender.debuglog.MaxBackupIndex
=
0
log4j.appender.debuglog.file
=
D:/jakarta-tomcat-
4.1.30
/webapps/ROOT/logs/debug.log
log4j.appender.debuglog.layout
=
org.apache.log4j.PatternLayout
log4j.appender.debuglog.layout.ConversionPattern
=
%m%n
#info输出源配置
log4j.logger.infolog
=
DEBUG
,
infolog
log4j.appender.infolog
=
org.apache.log4j.RollingFileAppender
log4j.appender.infolog.MaxFileSize
=
50000KB
log4j.appender.infolog.MaxBackupIndex
=
0
log4j.appender.infolog.file
=
D:/jakarta-tomcat-
4.1.30
/webapps/ROOT/logs/info.log
log4j.appender.infolog.layout
=
org.apache.log4j.PatternLayout
log4j.appender.infolog.layout.ConversionPattern
=
%m%n
#warn输出源配置
log4j.logger.warnlog
=
DEBUG
,
warnlog
log4j.appender.warnlog
=
org.apache.log4j.RollingFileAppender
log4j.appender.warnlog.MaxFileSize
=
50000KB
log4j.appender.warnlog.MaxBackupIndex
=
0
log4j.appender.warnlog.file
=
D:/jakarta-tomcat-
4.1.30
/webapps/ROOT/logs/warn.log
log4j.appender.warnlog.layout
=
org.apache.log4j.PatternLayout
log4j.appender.warnlog.layout.ConversionPattern
=
%d%X%-5p%m%n
#error输出源配置
log4j.logger.errorlog
=
DEBUG
,
errorlog
log4j.appender.errorlog
=
org.apache.log4j.RollingFileAppender
log4j.appender.errorlog.MaxFileSize
=
50000KB
log4j.appender.errorlog.MaxBackupIndex
=
0
log4j.appender.errorlog.file
=
D:/jakarta-tomcat-
4.1.30
/webapps/ROOT/logs/error.log
log4j.appender.errorlog.layout
=
org.apache.log4j.PatternLayout
log4j.appender.errorlog.layout.ConversionPattern
=
%d%x%-5p%m%n
网友例二:其余的
在spring+hibernate+struts项目开发中的log4j配置
关键词: log4j.rootLogge
##*********************自定义log4j配置*******************************##
###copybyMSY###
###设置根Logger级别INFO
,
输出地MSY,MSY2##
log4j.rootLogger
=
DEBUG
,
MSY
,
MSY2
设置com.hcinfo.velocity域对应的级别INFO
,
DEBUG
,
WARN
,
ERROR和输出地MSY,MSY2
log4j.category.com.hcinfo.velocity
=
DEBUG
###定义stdout的输出到控制断###
#log4j.appender.MSY
=
org.apache.log4j.ConsoleAppender
#log4j.appender.MSY.Target
=
System.out
###定义stdout布局模式为PatternLayout###
#log4j.appender.MSY.layout
=
org.apache.log4j.PatternLayout
###定义stdout的输出格式###
#log4j.appender.MSY.layout.ConversionPattern
=
%d{ABSOLUTE}%5p%c{
1
}:%L-%m%n
###定义MSY输出到文件(文件大小到达指定尺寸的时候产生一个新的文件)###
log4j.appender.MSY2
=
org.apache.log4j.RollingFileAppender
###文件位置###
log4j.appender.MSY2.File
=
e:/sys2.txt
###文件最大长度###
log4j.appender.MSY2.MaxFileSize
=
500KB
###备份文件数目###
log4j.appender.MSY2.MaxBackupIndex
=
1
log4j.appender.MSY2.layout
=
org.apache.log4j.PatternLayout
log4j.appender.MSY2.layout.ConversionPattern
=
%d{yyyy-MM-ddHH:mm:ss
,
SSS}
[
%t
]
[
%c
]
[
%p
]
-%m%n
###配置日志输出的格式##
###格式说明
#-X号:X信息输出时左对齐;
#%p:日志信息级别
#%d{}:日志信息产生时间
#%c:日志信息所在地(类名)
#%m:产生的日志具体信息
#%n:输出日志信息换行
###下面是定义hibernateLOG4J配置格式###
###directlogmessagestostdout###
log4j.appender.stdout
=
org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target
=
System.out
log4j.appender.stdout.layout
=
org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern
=
%d{ABSOLUTE}%5p%c{
1
}:%L-%m%n
###directmessagestofilehibernate.log###
#log4j.appender.file
=
org.apache.log4j.FileAppender
#log4j.appender.file.File
=
hibernate.log
#log4j.appender.file.layout
=
org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern
=
%d{ABSOLUTE}%5p%c{
1
}:%L-%m%n
###setloglevels-formoreverboseloggingchange'info'to'debug'###
###在次可定义输出输出端stdout###
log4j.rootLogger
=
warn
,
stdout
log4j.logger.net.sf.hibernate
=
info
###logjusttheSQL
#log4j.logger.net.sf.hibernate.SQL
=
debug
###logJDBCbindparameters###
log4j.logger.net.sf.hibernate.type
=
info
###logschemaexport/update###
log4j.logger.net.sf.hibernate.tool.hbm2ddl
=
debug
###logcacheactivity###
#log4j.logger.net.sf.hibernate.cache
=
debug
###logjdbcresourceacquisition
#log4j.logger.net.sf.hibernate.impl.BatcherImpl
=
debug
###enablethefollowinglineifyouwanttotrackdownconnection###
###leakageswhenusingDriverManagerConnectionProvider###
#log4j.logger.net.sf.hibernate.connection.DriverManagerConnectionProvider
=
trace
##定义log4j的spring配置##
log4j.rootLogger
=
DEBUG
,
Spring
log4j.appender.Spring
=
org.apache.log4j.ConsoleAppender
log4j.appender.Spring.Target
=
System.out
log4j.appender.Spring.layout
=
org.apache.log4j.PatternLayout
log4j.appender.Spring.layout.ConversionPattern
=
%d{ABSOLUTE}%5p%c{
1
}:%L-%m%n
####
web.xml中的修改:
这样配置文件以及日志文件可以在spring的帮助下,放到开发环境中的任意位置
在这里定位配置文件,需要的是从root开始的绝对路径
,或者设置个
<
context-param
>
<
param-name
>
log4jConfigLocation
</
param-name
>
<
param-value
>
classpath:log4j.properties
</
param-value
>
</
context-param
>
<!--
Spring默认刷新Log4j配置文件的间隔,单位为millisecond
-->
<
context-param
>
<
param-name
>
log4jRefreshInterval
</
param-name
>
<
param-value
>
60000
</
param-value
>
</
context-param
>
<!--
Springlog4jConfigloader
-->
<
listener
>
<
listener-class
>
org.springframework.web.util.Log4jConfigListener
</
listener-class
>
</
listener
>
设置监听器
<
context-param
>
<
param-name
>
log4jConfigLocation
</
param-name
>
<
param-value
>
classpath:log4j.properties
</
param-value
>
</
context-param
>
<
servlet
>
<
servlet-name
>
log4j
</
servlet-name
>
<
servlet-class
>
org.springframework.web.util.Log4jConfigServlet
</
servlet-class
>
<
load-on-startup
>
0
</
load-on-startup
>
</
servlet
>
==================================
什么都做完了,那该测试了,
在action中增加
static
Logger_log
=
Logger.getLogger(
this
.getClass().getName);
//
log4j(1)然后就可以在需要的地方进行日志记载
_log.debug(
"
做下测试.debug
"
);
_log.info(
"
做下测试.info
"
);
_log.warn(
"
做下测试.warn
"
);
_log.error(
"
做下测试.error
"
);
_log.fatal(
"
做下测试.fatal
"
);
补充:
有时候log日志的位置总觉的绝对路径不爽,那你可以用参数啊,比如${webapp.root}/WEB-INF/log/就是你的项目路径里的了,具体在哪里你自己看了