Log4j学习笔记(2)_log4j配置示例&Spring集成log4j

log4j配置示例

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#定义根日志级别和输出端(定义了两个输出端)

log4j.rootLogger=ERROR,CONSOLE,Orclight

#定义第一个输出端，输出到控制台

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender

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

log4j.appender.CONSOLE.layout.ConversionPattern=%d [%t] %-5p %c(%L) - %m%n

#定时第二个输出端，输出到文件,该文件最大空间为1000KB，超过1000KB后自动备份，生成新文件

log4j.appender.Orclight=org.apache.log4j.RollingFileAppender

log4j.appender.Orclight.file=orclight.log

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

log4j.appender.Orclight.layout.conversionPattern=%d [%t] %-5p %c(%L) - %m%n

log4j.appender.Orclight.MaxFileSize=1000KB

log4j.appender.Orclight.MaxBackupIndex=10

#定义具体某个包下的日志输出级别

log4j.logger.com.orclight.rbac=INFO,Orclight,CONSOLE

log4j.logger.com.orclight.rbac.services.impl.CacheServiceImpl=INFO,Orclight

log4j.logger.org.springframework=ERROR,Orclight

log4j.logger.org.springframework.jdbc.support=INFO

log4j.logger.org.springframework.scheduling=INFO

#定义sql语句的输出级别

log4j.logger.java.sql.Connection=DEBUG

# Struts OgnlUtil issues unimportant warnings

log4j.logger.com.opensymphony.xwork2.util.OgnlUtil=ERROR

log4j.logger.com.opensymphony.xwork2.ognl.OgnlValueStack=ERROR

在Spring中集成log4j

在web应用中为Spring配置log4j

Spring的做法是使用一个Servlet Listener，在Web Container启动时把ROOT的绝对路径写到系统变量里，这样log4j的配置文件里就可以用${myAppfuse.root}来表示刚刚设进去的系统变量：log4j.appender.logfile.File=${myAppfuse.root}/logs/mylog.log

在Web.xml中配置语句如下：

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<context-param>

<param-name>webAppRootKey</param-name>

<param-value>myappfuse.root</param-value>

</context-param>

<context-param>

<param-name>log4jConfigLocation</param-name>

<param-value>/WEB-INF/classes/log4j.properties</param-value>

</context-param>

<listener>

<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>

</listener>

<!--这里配置了一个listener，也可以配置servlet:-->

<!--

<servlet>

<servlet-name>log4j</servlet-name>

<servlet-class>

org.springframework.web.util.Log4jConfigServlet

</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

-->