log4j的使用

1、需要导入的包

< dependency >     < groupId >org.slf4j</ groupId >     < artifactId >slf4j-log4j12</ artifactId >     < version >1.7.6</ version >    </ dependency >    < dependency >     < groupId >org.slf4j</ groupId >     < artifactId >slf4j-api</ artifactId >     < version >1.7.5</ version >    </ dependency >    < dependency >     < groupId >ch.qos.logback</ groupId >     < artifactId >logback-core</ artifactId >     < version >1.0.13</ version >    </ dependency >    < dependency >     < groupId >ch.qos.logback</ groupId >     < artifactId >logback-classic</ artifactId >     < version >1.0.13</ version >    </ dependency >

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2、log4j.properties的配置，该文件放到src\main\resources\log4j.properties

仅输出相关的日志

log4j.root Logger =info,  ServerDailyRollingFile , stdout log4j.appender. ServerDailyRollingFile =org.apache.log4j. DailyRollingFileAppender log4j.appender. ServerDailyRollingFile . DatePattern = '.' yyyy- MM -dd log4j.appender. ServerDailyRollingFile . File =C://logs/notify-subscription.log log4j.appender. ServerDailyRollingFile .layout=org.apache.log4j. PatternLayout log4j.appender. ServerDailyRollingFile .layout. ConversionPattern = %d - %m%n log4j.appender. ServerDailyRollingFile . Append =true   log4j.appender.stdout=org.apache.log4j. ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j. PatternLayout log4j.appender.stdout.layout. ConversionPattern = %d{yyyy-MM-dd HH:mm:ss} %p [%c] %m%n

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详细的日志配置

log4j.root Logger =debug,console Appender ,file Appender log4j.category. ETTAppLogger =debug, ett AppLogFile log4j.appender.console Appender =org.apache.log4j. ConsoleAppender log4j.appender.console Appender . Threshold =debug log4j.appender.console Appender .layout=org.apache.log4j. PatternLayout log4j.appender.console Appender .layout. ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss SSS} ->[%t]--[%-5p]--[%c{1}]--%m%n log4j.appender.file Appender =org.apache.log4j. DailyRollingFileAppender #log4j.appender.file Appender . File =c:/temp/nstd/debug1.log log4j.appender.file Appender . DatePattern = '_' yyyy- MM -dd '.log' log4j.appender.file Appender . Threshold = TRACE log4j.appender.file Appender . Encoding = BIG5 log4j.appender.file Appender .layout=org.apache.log4j. PatternLayout log4j.appender.file Appender .layout. ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss SSS}-->[%t]--[%-5p]--[%c{1}]--%m%n log4j.appender.ett AppLogFile =org.apache.log4j. DailyRollingFileAppender #log4j.appender.ett AppLogFile . File =c:/temp/nstd/ettdebug.log log4j.appender.ett AppLogFile . DatePattern = '_' yyyy- MM -dd '.log' log4j.appender.ett AppLogFile . Threshold = DEBUG log4j.appender.ett AppLogFile .layout=org.apache.log4j. PatternLayout log4j.appender.ett AppLogFile .layout. ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss SSS}-->[%t]--[%-5p]--[%c{1}]--%m%n

测试代码

import  org.slf4j.Logger; import  org.slf4j.LoggerFactory;   public  class  Slf4jTest {   //  private final static Logger log = LoggerFactory.getLogger(Slf4jTest.class);        private  final  static  Logger log1 = LoggerFactory.getLogger( "Slf4jTest.class" );              public  static  void  main(String[] args) {                    try  {              log1.error( "this is an error test." );              log1.info( "{} is {}." , new  Object[]{ "a" , "b" });              log1.debug( "aaaaaaaaaaaaaa" );              System.out.println( "OK." );          }  catch  (Exception e) {              e.printStackTrace();          }      } }

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