log4j日志技术的使用

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1.导入必要的jar包,log4j.api和log4j.core,如果是SSH环境之类可能还需要其他jar包。配置文件log4j.properties内容如下：

log4j.rootLogger=info, R,userLoglog4j.appender.R=org.apache.log4j.RollingFileAppenderlog4j.appender.R.File=E:/BestLog.loglog4j.appender.R.MaxFileSize=100MBlog4j.appender.R.MaxBackupIndex=20log4j.appender.R.layout=org.apache.log4j.PatternLayoutlog4j.appender.R.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} [%p] %c - %m%n log4j.appender.userLog=org.apache.log4j.ConsoleAppenderlog4j.appender.userLog.Target=System.outlog4j.appender.userLog.layout=org.apache.log4j.PatternLayoutlog4j.appender.userLog.layout.ConversionPattern=%m%n

2.在xml文件中配置：

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

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