Log4j学习札记(2)_log4j配置示例&Spring集成log4j
Log4j学习笔记(2)_log4j配置示例&Spring集成log4j
log4j配置示例
#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:
<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> -->