log4j的应用

1、首先引入log4j的jar包。

2、在web。xml里面配置

<context-param>
  <param-name>webAppRootKey</param-name>
  <param-value>webApp.root</param-value>
 </context-param>

  <context-param>
  <param-name>log4jConfigLocation</param-name>
  <param-value>/WEB-INF/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>

 

3、在>/WEB-INF下写log4j.properties

 

log4j.rootLogger=INFO,model
#log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.model=org.apache.log4j.DailyRollingFileAppender
log4j.appender.model.File=${webApp.root}/WEB-INF/logs/tzgw.log
log4j.appender.model.Append=true
log4j.appender.model.layout=org.apache.log4j.PatternLayout
log4j.appender.model.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} [%-5p][%c{1}] - %m%n

 

每天生成一个log文件。

 

4、在需要记录日志的类文件里

 

static Logger logger = Logger.getLogger(YourAction.class);

 

logger.info("测试写入是否成功“）；s