logback 配置 logback 配置详解(推荐)

 <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>1.0.11</version>
 </dependency>
 <dependency>
  <groupId>ch.qos.logback</groupId>
  <artifactId>logback-classic</artifactId>
  <version>1.0.11</version>
 </dependency>

package io.beansoft.logback.demo.universal;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 *
 * @author beanlam
 * @date 2017年2月9日 下午11:17:53
 * @version 1.0
 *
 */
public class SimpleDemo {

 private static final Logger logger = LoggerFactory.getLogger(SimpleDemo.class);

 public static void main(String[] args) {
 logger.info("Hello, this is a line of log message logged by Logback");
 }
}

package io.beansoft.logback.demo.universal;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.core.util.StatusPrinter;

/**
 *
 *
 * @author beanlam
 * @date 2017年2月9日 下午11:31:55
 * @version 1.0
 *
 */
public class LogInternalStateDemo {

 private static final Logger logger = LoggerFactory.getLogger(LogInternalStateDemo.class);
 
 public static void main(String[] args) {
 logger.info("Hello world");
 
 //打印 Logback 内部状态
 LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
 StatusPrinter.print(lc);
 }
}

Logger rootLogger = LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);

package org.slf4j; 
public interface Logger {

 // Printing methods: 
 public void trace(String message);
 public void debug(String message);
 public void info(String message); 
 public void warn(String message); 
 public void error(String message); 
}

package io.beansoft.logback.demo.universal;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.Level;

/**
 *
 *
 * @author beanlam
 * @date 2017年2月10日 上午12:20:33
 * @version 1.0
 *
 */
public class LogLevelDemo {

 public static void main(String[] args) {
 
 //这里强制类型转换时为了能设置 logger 的 Level
 ch.qos.logback.classic.Logger logger = 
  (ch.qos.logback.classic.Logger) LoggerFactory.getLogger("com.foo");
 logger.setLevel(Level.INFO);
 
 Logger barlogger = LoggerFactory.getLogger("com.foo.Bar");

 // 这个语句能打印，因为 WARN > INFO
 logger.warn("can be printed because WARN > INFO");

 // 这个语句不能打印，因为 DEBUG < INFO. 
 logger.debug("can not be printed because DEBUG < INFO");

 // barlogger 是 logger 的一个子 logger
 // 它继承了 logger 的级别 INFO
 // 以下语句能打印，因为 INFO >= INFO
 barlogger.info("can be printed because INFO >= INFO");

 // 以下语句不能打印，因为 DEBUG < INFO
 barlogger.debug("can not be printed because DEBUG < INFO");
 }
}

logger.debug("the message is " + msg + " from " + somebody);

if(logger.isDebugEnabled()) { 
 logger.debug("the message is " + msg + " from " + somebody);
}

logger.debug("the message {} is from {}", msg, somebody);

<configuration>

 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
 <!-- encoders are assigned the type
  ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
 <encoder>
 <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
 </encoder>
 </appender>

 <root level="debug">
 <appender-ref ref="STDOUT" />
 </root>
</configuration>

public static void main(String[] args) {
 // assume SLF4J is bound to logback in the current environment
 LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
 // print logback's internal status
 StatusPrinter.print(lc);
 ...
}

<configuration debug="true">
 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
  <!-- encoders are assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder 
   by default -->
  <encoder>
   <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
   </pattern>
  </encoder>
 </appender>

 <root level="debug">
  <appender-ref ref="STDOUT" />
 </root>
</configuration>

<configuration>
 <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" /> 
 ... the rest of the configuration file 
</configuration>

<configuration scan="true" scanPeriod="30 seconds" > 
 ...
</configuration> 

<configuration packagingData="true">
 ...
</configuration>

LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
 lc.setPackagingDataEnabled(true);

package chapters.configuration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.joran.JoranConfigurator;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.util.StatusPrinter;

public class MyApp3 {
 final static Logger logger = LoggerFactory.getLogger(MyApp3.class);

 public static void main(String[] args) {
 // assume SLF4J is bound to logback in the current environment
 LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
 
 try {
  JoranConfigurator configurator = new JoranConfigurator();
  configurator.setContext(context);
  // Call context.reset() to clear any previous configuration, e.g. default 
  // configuration. For multi-step configuration, omit calling context.reset().
  context.reset(); 
  configurator.doConfigure(args[0]);
 } catch (JoranException je) {
  // StatusPrinter will handle this
 }
 StatusPrinter.printInCaseOfErrorsOrWarnings(context);

 logger.info("Entering application.");

 Foo foo = new Foo();
 foo.doIt();
 logger.info("Exiting application.");
 }
}

<logger name="HELLO" level="debug">
 <appender-ref ref="FILE" />
 <appender-ref ref="STDOUT" />
</logger>

<configuration>
 <contextName>myAppName</contextName>
 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
 <encoder>
  <pattern>%d %contextName [%t] %level %logger{36} - %msg%n</pattern>
 </encoder>
 </appender>

 <root level="debug">
 <appender-ref ref="STDOUT" />
 </root>
</configuration>

<configuration>

 <property name="USER_HOME" value="/home/sebastien" />

 <appender name="FILE" class="ch.qos.logback.core.FileAppender">
 <file>${USER_HOME}/myApp.log</file>
 <encoder>
  <pattern>%msg%n</pattern>
 </encoder>
 </appender>

 <root level="debug">
 <appender-ref ref="FILE" />
 </root>
</configuration>

java -DUSER_HOME="/home/sebastien" MyApp2

<configuration>

 <property file="src/main/java/chapters/configuration/variables1.properties" />

 <appender name="FILE" class="ch.qos.logback.core.FileAppender">
  <file>${USER_HOME}/myApp.log</file>
  <encoder>
  <pattern>%msg%n</pattern>
  </encoder>
 </appender>

 <root level="debug">
  <appender-ref ref="FILE" />
 </root>
</configuration>

<configuration>

 <property resource="resource1.properties" />

 <appender name="FILE" class="ch.qos.logback.core.FileAppender">
  <file>${USER_HOME}/myApp.log</file>
  <encoder>
  <pattern>%msg%n</pattern>
  </encoder>
 </appender>

 <root level="debug">
  <appender-ref ref="FILE" />
 </root>
</configuration>

USER_HOME=/home/sebastien

<configuration>

 <property scope="context" name="nodeId" value="firstNode" />

 <appender name="FILE" class="ch.qos.logback.core.FileAppender">
 <file>/opt/${nodeId}/myApp.log</file>
 <encoder>
  <pattern>%msg%n</pattern>
 </encoder>
 </appender>

 <root level="debug">
 <appender-ref ref="FILE" />
 </root>
</configuration>

${aName:-golden}

<configuration>

 <define name="rootLevel" class="a.class.implementing.PropertyDefiner">
 <shape>round</shape>
 <color>brown</color>
 <size>24</size>
 </define>
 
 <root level="${rootLevel}"/>
</configuration>

 <!-- if-then form -->
 <if condition="some conditional expression">
 <then>
  ...
 </then>
 </if>
 
 <!-- if-then-else form -->
 <if condition="some conditional expression">
 <then>
  ...
 </then>
 <else>
  ...
 </else> 
 </if>

<configuration debug="true">

 <if condition='property("HOSTNAME").contains("torino")'>
 <then>
  <appender name="CON" class="ch.qos.logback.core.ConsoleAppender">
  <encoder>
   <pattern>%d %-5level %logger{35} - %msg %n</pattern>
  </encoder>
  </appender>
  <root>
  <appender-ref ref="CON" />
  </root>
 </then>
 </if>

 <appender name="FILE" class="ch.qos.logback.core.FileAppender">
 <file>${randomOutputDir}/conditional.log</file>
 <encoder>
  <pattern>%d %-5level %logger{35} - %msg %n</pattern>
 </encoder>
 </appender>

 <root level="ERROR">
  <appender-ref ref="FILE" />
 </root>
</configuration>

<configuration>
 <insertFromJNDI env-entry-name="java:comp/env/appName" as="appName" />
 <contextName>${appName}</contextName>

 <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
 <encoder>
  <pattern>%d ${CONTEXT_NAME} %level %msg %logger{50}%n</pattern>
 </encoder>
 </appender>

 <root level="DEBUG">
 <appender-ref ref="CONSOLE" />
 </root>
</configuration>

<configuration>
 <include file="src/main/java/chapters/configuration/includedConfig.xml"/>

 <root level="DEBUG">
 <appender-ref ref="includedConsole" />
 </root>

</configuration>

<included>
 <appender name="includedConsole" class="ch.qos.logback.core.ConsoleAppender">
 <encoder>
  <pattern>"%d - %m%n"</pattern>
 </encoder>
 </appender>
</included>

<include file="src/main/java/chapters/configuration/includedConfig.xml"/>

<include resource="includedConfig.xml"/>

<include url="http://some.host.com/includedConfig.xml"/>

<include optional="true" ..../>

<configuration debug="true">
 <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator"/>
 .... 
</configuration>