根据日志不同级别，进行配置输出

红太狼 2022-09-29 06:08 220阅读 0赞

引用：[http://www.blogjava.net/zJun/archive/2006/06/28/55511.html][http_www.blogjava.net_zJun_archive_2006_06_28_55511.html]

**配置文件：**

\#\#\# set log levels \#\#\#  
log4j.rootLogger = debug ,  stdout ,  D ,  E

\#\#\# 输出到控制台 \#\#\#  
log4j.appender.stdout = org.apache.log4j.ConsoleAppender  
log4j.appender.stdout.Target = System.out  
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout  
log4j.appender.stdout.layout.ConversionPattern =  %d\{ABSOLUTE\} %5p %c\{ 1 \}:%L - %m%n

\#\#\# 输出到日志文件 \#\#\#  
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender  
log4j.appender.D.File = logs/log.log  
log4j.appender.D.Append = true  
log4j.appender.D.Threshold = DEBUG \#\# 输出DEBUG级别以上的日志  
log4j.appender.D.layout = org.apache.log4j.PatternLayout  
log4j.appender.D.layout.ConversionPattern = %-d\{yyyy-MM-dd HH:mm:ss\}  \[ %t:%r \] - \[ %p \]  %m%n

\#\#\# 保存异常信息到单独文件 \#\#\#  
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender

\#\# 异常日志文件名  
log4j.appender.E.File = logs/error.log  
log4j.appender.E.Append = true

\#\# 只输出ERROR级别以上的日志!!!  
log4j.appender.E.Threshold = ERROR

log4j.appender.E.layout = org.apache.log4j.PatternLayout  
log4j.appender.E.layout.ConversionPattern = %-d\{yyyy-MM-dd HH:mm:ss\}  \[ %t:%r \] - \[ %p \]  %m%n

**代码中使用**

public   class  TestLog4j   \{  
     public   static   void  main(String\[\] args)   \{  
        PropertyConfigurator.configure( " D:/Code/conf/log4j.properties " );  
        Logger logger  =  Logger.getLogger(TestLog4j. class );  
        logger.debug( " debug " );  
        logger.error( " error " );  
    \}  
\}

[http_www.blogjava.net_zJun_archive_2006_06_28_55511.html]: http://www.blogjava.net/zJun/archive/2006/06/28/55511.html