log4j配置

      
	
		
							value="%d{yyyy-MM-dd HH:mm:ss} %-5p [%t - %F:%L - %c] %m%n" />
		
		
			
			
			
		
	

      
            class="org.apache.log4j.DailyRollingFileAppender">  
          
          
          
          
          
              
          
       

      
            class="org.apache.log4j.RollingFileAppender">  
          
          
          
          
          
          
          
              
          
      

      
            class="org.apache.log4j.FileAppender">  
          
          
          
              
          
      


    
		
		
		
	

      
          
               
            
            
     

指定日志输出：

	private final static Logger logger = Logger.getLogger("raily");

log4j.properties文件配置方式

log4j.logger.reclogger=DEBUG,rec
log4j.appender.rec=org.apache.log4j.RollingFileAppender
log4j.appender.rec.File=${catalina.home}/logs/rec/rec.log
log4j.appender.rec.MaxFileSize=500KB
log4j.appender.rec.MaxBackupIndex=5
log4j.appender.rec.layout=org.apache.log4j.PatternLayout
log4j.appender.rec.layout.ConversionPattern=%d{yyyyMMdd HH:mm:ss} %p %l [%t] %m%n

指定日志输出：

	private final static Logger logger = Logger.getLogger("reclogger");