log4j logback slf4j配置

一. Log4j+commons-logging

JAR包

commons-logging-1.1.jar

log4j-1.2.15.jar

配置文件

commons-logging.properties

log4j.xml

commons-logging.jar包读取commons-logging.properties中指定的log,自动加载日志配置

在commons-logging+log4j组合中commons-logging.properties指定的日志为:

org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger

log4j指定具体日志输出配置

如果未选用commons-logging,可以在启动项目中,主动加载log4j的配置文件

二. Logback+slf4j

JAR包

slf4j-api-1.5.2.jar

logback-classic-0.9.9.jar

logback-core-0.9.9.jar

配置文件

Logback.xml

logback的加载采用编码加载

String logbackCfg = "/config/logback.xml";
URL logURL = new ClassPathResource(logbackCfg).getURL();
ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
LoggerContext loggerContext = (LoggerContext) loggerFactory;
loggerContext.shutdownAndReset();
JoranConfigurator configurator = new JoranConfigurator();
configurator.setContext(loggerContext);
configurator.doConfigure(logURL);

三. Slf4j+log4j

JAR包

slf4j-api-1.5.2.jar

slf4j-log4j12-1.5.2.jar

log4j-1.2.15.jar

配置文件

Logback.xml

四. Slf4j+logback+logback

注:这种情况下是项目中有log4j输出的日志以及logback数据的日志.老项目改造,log4j和logback共存的情况下.(当选用spring+slf4j+logback的时候,spring的日志输出是log4j的,这个时候采用这种配置.)

JARbao

log4j-over-slf4j-1.5.2.jar

logback-classic-0.9.9.jar

logback-core-0.9.9.jar

slf4j-api-1.5.2.jar

配置文件

Logback.xml

配置加载

String logbackCfg = "/config/logback.xml";

URL logURL = new ClassPathResource(logbackCfg).getURL();

ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();

LoggerContext loggerContext = (LoggerContext) loggerFactory;

loggerContext.shutdownAndReset();

JoranConfigurator configurator = new JoranConfigurator();

configurator.setContext(loggerContext);

configurator.doConfigure(logURL);

五. Log4j配置文件示例

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<!-- 控制台输出-->
<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">

<param name="Target" value="System.out" />

<param name="Threshold" value="INFO" />

<layout class="org.apache.log4j.PatternLayout">

<param name="ConversionPattern"

value="%d{yyyy-MM-dd HH:mm:ss sss}[%-p][%-c][line:%-L] \r\n  %m%n" />

</layout>

<!— 以下是过滤一些不需要输出的log信息 -->

<filter class="org.apache.log4j.varia.StringMatchFilter">

<param name="StringToMatch" value="new a seq no spend" />

<param name="AcceptOnMatch" value="false" />

</filter>

<filter class="org.apache.log4j.varia.StringMatchFilter">

<param name="StringToMatch" value="new hi[type=" />

<param name="AcceptOnMatch" value="false" />

</filter>

<filter class="org.apache.log4j.varia.StringMatchFilter">

<param name="StringToMatch" value="FileTransfer.execCommand()" />

<param name="AcceptOnMatch" value="false" />

</filter>

</appender>

<!--文件输出 按照文件大小滚动文件-->

<appender name="xxxx_file" class="org.apache.log4j.RollingFileAppender">

<param name="Append" value="true" />

<param name="Threshold" value="INFO" />

<param name="File" value="xxxx.log" />

<param name="MaxFileSize" value="100MB" />

<param name="MaxBackupIndex" value="15" />

<layout class="org.apache.log4j.PatternLayout">

<param name="ConversionPattern"

value="%d{yyyy-MM-dd HH:mm:ss sss}[%-p][%-c][line:%-L] \r\n  %m%n" />

</layout>

<filter class="org.apache.log4j.varia.StringMatchFilter">

<param name="StringToMatch" value="new a seq no spend" />

<param name="AcceptOnMatch" value="false" />

</filter>

<filter class="org.apache.log4j.varia.StringMatchFilter">

<param name="StringToMatch" value="new hi[type=" />

<param name="AcceptOnMatch" value="false" />

</filter>

<filter class="org.apache.log4j.varia.StringMatchFilter">

<param name="StringToMatch" value="FileTransfer.execCommand()" />

<param name="AcceptOnMatch" value="false" />

</filter>

</appender>

<!-- 错误输出 过滤出错误日志信息-->

<appender name="xxxx_error" class="org.apache.log4j.RollingFileAppender">

<param name="Append" value="true" />

<param name="Threshold" value="ERROR" />

<param name="File" value="xxxx-error.log" />

<param name="MaxFileSize" value="100MB" />

<param name="MaxBackupIndex" value="4" />

<layout class="org.apache.log4j.PatternLayout">

<param name="ConversionPattern"

value="%d{yyyy-MM-dd HH:mm:ss sss}[%-p][%-c][line:%-L] \r\n  %m%n" />

</layout>

</appender>

<!-- 根loggr -->
<root>

<appender-ref ref="CONSOLE" />

<appender-ref ref="xxxx_file" />

<appender-ref ref="xxxx_file_error" />

</root>

</log4j:configuration>

六. Logback配置文件示例

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE configuration>

<configuration>
<jmxConfigurator />

<!-- 控制台输出日志 -->
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">

<layout class="ch.qos.logback.classic.PatternLayout">

<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>

</layout>

</appender>

<!-- 文件输出日志 (文件大小策略进行文件输出，超过指定大小对文件备份)-->

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">

<File>xxxx.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>xxxx.log.%i.bak</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>12</MaxIndex>
</rollingPolicy>

<triggeringPolicy
class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>100MB</MaxFileSize>
</triggeringPolicy>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>

<appender name="FILE-ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>ERROR</level>
<OnMismatch>DENY</OnMismatch>
<OnMatch>ACCEPT</OnMatch>
</filter>

<File>xxxx-err.log</File>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<FileNamePattern>xxxx-err.log.%i.bak</FileNamePattern>
<MinIndex>1</MinIndex>
<MaxIndex>3</MaxIndex>
</rollingPolicy>
<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<MaxFileSize>100MB</MaxFileSize>
</triggeringPolicy>
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>

<!--这里指定logger name 是为jmx设置日志级别做铺垫 -->
<logger name="com.xxx.xxx">
<level value="INFO" />
<appender-ref ref="STDOUT" />
<appender-ref ref="FILE" />
<appender-ref ref="FILE-ERROR" />
</logger>

</configuration>

七. 相关简单说明

Log4j

Log4j是Apache的一个开放源代码项目，通过使用Log4j，我们可以控制日志信息输送的目的地是控制台、文件、GUI组件、甚至是套接口服务 器、NT的事件记录器、UNIXSyslog守护进程等；用户也可以控制每一条日志的输出格式；通过定义每一条日志信息的级别，用户能够更加细致地控制日志的生成过程。这些可以通过一个配置文件来灵活地进行配置，而不需要修改程序代码

Slf4j

简单日记门面(Facade)SLF4J是为各种logingAPIs提供一个简单统一的接口，从而使得最终用户能够在部署的时候配置自己希望的loging APIs实现。 LoggingAPI实现既可以选择直接实现SLF4J接的loging APIs如：NLOG4J、SimpleLogger。也可以通过SLF4J提供的API实现来开发相应的适配器如Log4jLoggerAdapter、JDK14LoggerAdapter。

Logback

Logback是由log4j创始人设计的又一个开源日记组件。logback当前分成三个模块：logback-core,logback-classic和logback-access。logback-core是其它两个模块的基础模块。logback-classic是log4j的一个改良版本。此外logback-classic完整实现SLF4J API使你可以很方便地更换成其它日记系统如log4j或JDK14Logging。logback-access访问模块与Servlet容器集成提供通过Http来访问日记的功能。