springboot使用slf4j+logback实现日志记录

1.pom.xml引入Jar包

        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>

2.配置logback-spring.xml

在resources目录下新建logback-spring.xml文件

<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <contextName>logscontextName>
    
    <property name="log.path" value="log" />
    
    <property name="log.maxHistory" value="15" />
    
    <property name="log.colorPattern" value="%magenta(%d{yyyy-MM-dd HH:mm:ss}) %highlight(%-5level) %yellow(%thread) %green(%logger) %msg%n"/>
    <property name="log.pattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5level %thread %logger %msg%n"/>

    
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${log.colorPattern}pattern>
        encoder>
    appender>

    
    <appender name="file_info" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/info/info.%d{yyyy-MM-dd}.logfileNamePattern>
            <MaxHistory>${log.maxHistory}MaxHistory>
        rollingPolicy>
        <encoder>
            <pattern>${log.pattern}pattern>
        encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFOlevel>
            <onMatch>ACCEPTonMatch>
            <onMismatch>DENYonMismatch>
        filter>
    appender>

    <appender name="file_error" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/error/error.%d{yyyy-MM-dd}.logfileNamePattern>
        rollingPolicy>
        <encoder>
            <pattern>${log.pattern}pattern>
        encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERRORlevel>
            <onMatch>ACCEPTonMatch>
            <onMismatch>DENYonMismatch>
        filter>
    appender>

    
    <root level="debug">
        <appender-ref ref="console" />
    root>
    
    <root level="info">
        <appender-ref ref="file_info" />
        <appender-ref ref="file_error" />
    root>
configuration>

3.记录日志

package springboot.demo.log.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Administrator on 2019/10/26.
 * @version 1.0
 */
@Slf4j
@RestController
public class TestController {
    @GetMapping("/index")
    public void index() {
        log.info("我记录日志了");
    }
}

使用 @Slf4j 注解，然后调用log方法就可以直接生成日志文件

4. 不同日志隔离打印案例

根据包进行日志文件隔离

这个例子里我们将com.glmapper.spring.boot.controller中的日志输出到glmapper-controller.log；将com.glmapper.spring.boot.service中的日志输出到glmapper-service.log

<appender name="GLMAPPER-SERVICE"
          class="ch.qos.logback.core.rolling.RollingFileAppender">
    <append>trueappend>
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>${logging.level}level>
    filter>
    <file>
        ${logging.path}/glmapper-spring-boot/glmapper-service.log
    file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <FileNamePattern>${logging.path}/glmapper-spring-boot/glmapper-service.log.%d{yyyy-MM-dd}FileNamePattern>
        <MaxHistory>30MaxHistory>
    rollingPolicy>
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
        <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%npattern>
        <charset>UTF-8charset>
    encoder>
appender>


<appender name="GLMAPPER-CONTROLLER"
          class="ch.qos.logback.core.rolling.RollingFileAppender">
    <append>trueappend>
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>${logging.level}level>
    filter>
    <file>
        ${logging.path}/glmapper-spring-boot/glmapper-controller.log
    file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <FileNamePattern>${logging.path}/glmapper-spring-boot/glmapper-controller.log.%d{yyyy-MM-dd}FileNamePattern>
        <MaxHistory>30MaxHistory>
    rollingPolicy>
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
        <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%npattern>
        <charset>UTF-8charset>
    encoder>
appender>


<logger name="com.glmapper.spring.boot.controller" level="${logging.level}" additivity="false">
    <appender-ref ref="GLMAPPER-CONTROLLER" />
    <appender-ref ref="GERROR-APPENDER" />
logger>


<logger name="com.glmapper.spring.boot.service" level="${logging.level}" additivity="false">
    <appender-ref ref="GLMAPPER-SERVICE" />
    <appender-ref ref="GERROR-APPENDER" />
logger>

根据类进行日志文件隔离

这个其实也是和上面那个差不过，只不过粒度更细一点，一般情况下比如说我们有个定时任务类需要单独来记录其日志信息，这样我们就可以考虑使用基于类维度来约束打印。

<appender name="SCHEDULERTASKLOCK-APPENDER" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <append>trueappend>
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>${logging.level}level>
    filter>
    <file>${logging.path}/glmapper-spring-boot/scheduler-task-lock.logfile>
    
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        
        <FileNamePattern>${logging.path}/glmapper-spring-boot/scheduler-task-lock.log.%d{yyyy-MM-dd}FileNamePattern>
        
        <MaxHistory>30MaxHistory>
    rollingPolicy>
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
        
        <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%npattern>
        
        <charset>UTF-8charset>
    encoder>
appender>


<logger name="com.glmapper.spring.boot.task.TestLogTask" level="${logging.level}" additivity="true">
        <appender-ref ref="SCHEDULERTASKLOCK-APPENDER" />
        <appender-ref ref="ERROR-APPENDER" />
    logger>

根据自定义 logger 的 name 进行日志文件隔离

logger的name除了类、包等约束之外，当然还可以这样来玩。。。

private static final Logger LOGGER = LoggerFactory.getLogger(TestLogTask.class);

在getLogger中我们是将当前对象的class作为参数的，这个是为了打印时获取其全限定名的

1-2018-07-21 11:15:42.003 [pool-1-thread-1] 
2-INFO  
3-com.glmapper.spring.boot.task.TestLogTask -
4-com.glmapper.spring.boot.task:info

业务类定义

我们同样是service包下定义一个类TestLogNameServiceImpl

package com.glmapper.spring.boot.service;

@Service("testLogNameService")
public class TestLogNameServiceImpl implements TestLogNameService {

    private static final Logger LOGGER = LoggerFactory.getLogger("GLMAPPER-TEST-LOG");

    @Override
    public void print() {
        LOGGER.info("GLMAPPER-TEST-LOG:this is special logger-----info");
        LOGGER.error("GLMAPPER-TEST-LOG:this is special logger-------error");
    }
}

logback-spring.xml配置：

<appender name="ROOT-APPENDER" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <append>trueappend>
    <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>${logging.level}level>
    filter>
    <file>${logging.path}/glmapper-spring-boot/glmapper-test.logfile>
    
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        
        <FileNamePattern>${logging.path}/glmapper-spring-boot/glmapper-test.log.%d{yyyy-MM-dd}
        FileNamePattern>
        
        <MaxHistory>30MaxHistory>
    rollingPolicy>
    <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
        
        <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%npattern>
        
        <charset>UTF-8charset>
    encoder>
appender>


<logger name="GLMAPPER-TEST-LOG" level="${logging.level}" additivity="true">
        <appender-ref ref="ROOT-APPENDER" />
        <appender-ref ref="ERROR-APPENDER" />
    logger>

这里TestLogNameServiceImpl中的日志不打印到glmapper-service.log中，而是打印到glmapper-test.log中。