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Logback是由log4j创始人设计的又一个开源日志组件。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志系统如log4j或JDK14 Logging。logback-access访问模块与Servlet容器集成提供通过Http来访问日志的功能
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>com.test</groupId> 5 <artifactId>test-logback</artifactId> 6 <packaging>war</packaging> 7 <version>0.0.1-SNAPSHOT</version> 8 <name>test Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>org.slf4j</groupId> 13 <artifactId>slf4j-api</artifactId> 14 <version>1.7.5</version> 15 <type>jar</type> 16 <scope>compile</scope> 17 </dependency> 18 19 <dependency> 20 <groupId>ch.qos.logback</groupId> 21 <artifactId>logback-core</artifactId> 22 <version>0.9.30</version> 23 <type>jar</type> 24 </dependency> 25 26 <dependency> 27 <groupId>ch.qos.logback</groupId> 28 <artifactId>logback-classic</artifactId> 29 <version>0.9.30</version> 30 <type>jar</type> 31 </dependency> 32 33 <dependency> 34 <groupId>ch.qos.logback</groupId> 35 <artifactId>logback-access</artifactId> 36 <version>0.9.30</version> 37 </dependency> 38 39 <dependency> 40 <groupId>junit</groupId> 41 <artifactId>junit</artifactId> 42 <version>3.8.1</version> 43 <scope>test</scope> 44 </dependency> 45 </dependencies> 46 <build> 47 <finalName>test</finalName> 48 </build> 49 </project>
1 package com.test; 2 3 import java.util.Date; 4 5 import org.slf4j.Logger; 6 import org.slf4j.LoggerFactory; 7 8 9 public class Test { 10 11 final static Logger logger = LoggerFactory.getLogger(Test.class ); 12 13 public static void main(String[] args) throws InterruptedException { 14 15 16 logger.debug( "现在的时间是 {}" , new Date().toString()); 17 18 logger.info( " This time is {}" , new Date().toString()); 19 20 logger.warn( " This time is {}" , new Date().toString()); 21 22 logger.error( " This time is {}" , new Date().toString()); 23 24 } 25 26 }
如果是maven工程直接把logback.xml放在src/main/resources里面即可。
1 <?xml version="1.0" encoding="UTF-8" ?> 2 3 <!-- scan="true" 当此属性设置为true时，配置文件如果发生改变，将会被重新加载，默认值为true。 --> 4 <!-- scanPeriod="30 seconds" 设置每30秒自动扫描,若没有指定具体单位则以milliseconds为标准(单位:milliseconds, seconds, minutes or hours) --> 5 <!-- debug="false"当此属性设置为true时，将打印出logback内部日志信息，实时查看logback运行状态。默认值为false。--> 6 <configuration scan="true" scanPeriod="30 seconds"> 7 <!-- 上下文名称 --> 8 <contextName>test</contextName> 9 10 <!-- 存放日志文件路径 --> 11 <property name="Log_Home" value="D:/logs/test" /> 12 13 <!-- INFO级别 --> 14 <appender name="FILE_INFO" class="ch.qos.logback.core.rolling.RollingFileAppender"> 15 16 <!-- 级别过滤器 --> 17 <filter class="ch.qos.logback.classic.filter.LevelFilter"> 18 <!-- 设置过滤级别 --> 19 <level>INFO</level> 20 <!-- 用于配置符合过滤条件的操作 --> 21 <onMatch>ACCEPT</onMatch> 22 <!-- 用于配置不符合过滤条件的操作 --> 23 <onMismatch>DENY</onMismatch> 24 </filter> 25 <Encoding>UTF-8</Encoding> 26 <File>${Log_Home}/info/info.log</File> 27 <!-- 根据时间来制定滚动策略 --> 28 <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> 29 <FileNamePattern> 30 ${Log_Home}/info/info.%d{yyyy-MM-dd}.%i.log 31 </FileNamePattern> 32 <!-- 多久后自动清楚旧的日志文件,单位:月 --> 33 <MaxHistory>1</MaxHistory> 34 <TimeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> 35 <!-- 默认值是 10MB,文档最大值 --> 36 <MaxFileSize>2MB</MaxFileSize> 37 </TimeBasedFileNamingAndTriggeringPolicy> 38 </rollingPolicy> 39 40 <encoder> 41 <Pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{50} - %msg%n</Pattern> 42 </encoder> 43 </appender> 44 45 <!-- ch.qos.logback.core.ConsoleAppender 控制台输出 --> 46 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> 47 <encoder> 48 <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符 --> 49 <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{50} - %msg%n</pattern> 50 </encoder> 51 </appender> 52 53 <!-- 控制java下面包的打印,没设置等级,将继承上级root的等级 --> 54 <logger name="com.test"/> 55 56 <!-- 当前日志总级别为TRACE、DEBUG、INFO、 WARN、ERROR、ALL和 OF --> 57 <!-- the level of the root level is set to DEBUG by default. --> 58 <root level="DEBUG"> 59 <appender-ref ref="STDOUT" /> 60 <appender-ref ref="FILE_INFO" /> 61 </root> 62 </configuration>
1 20:35:23,708 |-INFO in ch.qos.logback.classic.LoggerContext[test] - Could NOT find resource [logback.groovy] 2 20:35:23,709 |-INFO in ch.qos.logback.classic.LoggerContext[test] - Could NOT find resource [logback-test.xml] 3 20:35:23,709 |-INFO in ch.qos.logback.classic.LoggerContext[test] - Found resource [logback.xml] at [file:/D:/workspace/test-logback/target/classes/logback.xml] 4 20:35:23,751 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set 5 20:35:23,753 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Setting ReconfigureOnChangeFilter scanning period to 30 seconds 6 20:35:23,753 |-INFO in ReconfigureOnChangeFilter{invocationCounter=0} - Will scan for changes in [[D:\workspace\test-logback\target\classes\logback.xml]] every 30 seconds. 7 20:35:23,753 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Adding ReconfigureOnChangeFilter as a turbo filter 8 20:35:23,759 |-INFO in ch.qos.logback.classic.joran.action.ContextNameAction - Setting logger context name as [test] 9 20:35:23,760 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender] 10 20:35:23,763 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE_INFO] 11 20:35:23,783 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:13 - no applicable action for [Encoding], current pattern is [[configuration][appender][Encoding]] 12 20:35:23,819 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used 13 20:35:23,820 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern D:/logs/test/info/info.%d{yyyy-MM-dd}.%i.log for the active file 14 20:35:23,822 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@5599682f - The date pattern is ‘yyyy-MM-dd‘ from file name pattern ‘D:/logs/test/info/info.%d{yyyy-MM-dd}.%i.log‘. 15 20:35:23,822 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@5599682f - Roll-over at midnight. 16 20:35:23,824 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@5599682f - Setting initial period to Wed Jul 13 20:05:58 CST 2016 17 20:35:23,825 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 18 20:35:23,837 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE_INFO] - Active log file name: D:/logs/test/info/info.log 19 20:35:23,837 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE_INFO] - File property is set to [D:/logs/test/info/info.log] 20 20:35:23,838 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender] 21 20:35:23,839 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT] 22 20:35:23,840 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 23 20:35:23,841 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to DEBUG 24 20:35:23,841 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT] 25 20:35:23,841 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE_INFO] to Logger[ROOT] 26 20:35:23,842 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@4a871190 - Registering current configuration as safe fallback point 27 28 2016-07-13 20:35:23 [main] DEBUG com.test.Test - 现在的时间是 Wed Jul 13 20:35:23 CST 2016 29 2016-07-13 20:35:23 [main] INFO com.test.Test - This time is Wed Jul 13 20:35:23 CST 2016 30 2016-07-13 20:35:23 [main] WARN com.test.Test - This time is Wed Jul 13 20:35:23 CST 2016 31 2016-07-13 20:35:23 [main] ERROR com.test.Test - This time is Wed Jul 13 20:35:23 CST 2016
外部输出的日志文件如下：
info.log的内容：
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原文地址：http://www.cnblogs.com/h--d/p/5668152.html
