logback日志文件的使用

1、引入Jar包，Maven pom.xml

                <!-- Logging with SLF4J & LogBack -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>1.7.13</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.13</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jul-to-slf4j</artifactId>
            <version>1.7.13</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.3</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.1.3</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-access</artifactId>
            <version>1.1.3</version>
        </dependency>

2、配置日志文件 logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
        <resetJUL>true</resetJUL>
    </contextListener>
    <!-- To enable JMX Management -->
    <jmxConfigurator />

    <!-- 打印到控制台 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoder 默认配置为PatternLayoutEncoder -->
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{40} - %msg%n</Pattern>
        </layout>
    </appender>

    <!-- 打印日志到文件 -->
    <!-- 所有日志文件 -->
    <appender name="AllLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>log/shiro/all/%d{yyyy-MM-dd}.log</fileNamePattern>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{40} - %msg%n</pattern>
        </encoder>
    </appender>
    <!-- Task日志文件 -->
    <appender name="Tasklog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>log/shiro/task/%d{yyyy-MM-dd}.log</fileNamePattern>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{40} - %msg%n</pattern>
        </encoder>
    </appender>
    
    <!-- 为莫个包下的所有类指定Appender 这里也可以指定类名称例如：com.mcs.task.ClassName -->
     <logger name="cn.mcs.test" level="DEBUG" >
         <appender-ref ref="STDOUT" />
     </logger>
     <logger name="cn.mcs.task" level="DEBUG" >
         <appender-ref ref="Tasklog" />
     </logger>
     
     <logger name="org.springframework" level="INFO" /> 
       <logger name="org.springframework.beans" level="DEBUG" />

    <!-- 常用级别：ERROR 、WARN 、INFO 、DEBUG 、TRACE -->
    <root level="WARN">
        <appender-ref ref="STDOUT" />
        <!-- <appender-ref ref="AllLog" /> -->
      </root>


</configuration>  

3、在程序中使用

import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
public class LogbackTest {  
    private static Logger log = LoggerFactory.getLogger(LogbackTest .class);  
    public static void main(String[] args) {  
        log.trace("======trace");  
        log.debug("======debug");  
        log.info("======info");  
        log.warn("======warn");  
        log.error("======error");  
    }  
}