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Springboot使用Logback实现日志配置与异常记录

作者:Buckletime

默认情况下,SpringBoot内部使用logback作为系统日志实现的框架,将日志输出到控制台,不会写到日志文件。本篇文章主要讲解下如何自定义logabck.xml以及对logback文件中配置做一个详解,需要的可以参考一下

概述

默认情况下,SpringBoot内部使用logback作为系统日志实现的框架,将日志输出到控制台,不会写到日志文件。如果在application.properties或application.yml配置,这样只能配置简单的场景,保存路径、日志格式等。复杂的场景(区分 info 和 error 的日志、每天产生一个日志文件等)满足不了,只能自定义配置文件logback-spring.xml或者logback.xml。本篇文章主要讲解下如何自定义logabck.xml以及对logback文件中配置做一个详解。

logback配置详解

首先我们先了解下logback。

logback 主要分为三个模块:

官网配置文档地址:https://logback.qos.ch/manual/configuration.html

logback配置

1.application .properties

# 日志打印信息配置
logging.config=classpath:logback-spring.xml

2.logback-spring.xml

<?mybatis version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <contextName>logback</contextName>
    <!--输出到控制台-->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <!-- <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
             <level>ERROR</level>
         </filter>-->
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>
    <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"><!-- 日志文件会滚动 -->
        <!-- 文件路径 -->
        <file>./logs/gf_scanning.log</file><!-- 当前的日志文件存放路径 -->
        <!-- 日志滚动策略 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 历史日志文件的存放路径和名称 -->
            <fileNamePattern>./logs/gf_scanning.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
            <!-- 日志文件最大的保存历史 数量-->
            <maxHistory>30</maxHistory>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern> <!-- 日志文件中日志的格式 -->
        </encoder>
    </appender>
    <root level="info">
        <appender-ref ref="console"/>
        <appender-ref ref="file"/>
    </root>
</configuration>

异常情况

遇到个奇怪的问题,按上述配置完成logback的配置后,大多项目可以正常运行并保存日志到文件,但有一个项目启动时报错。java.lang.IllegalStateException: Could not initialize Logback logging from classpath:logback-spring.xml ... Caused by: ch.qos.logback.core.joran.spi.JoranException: Parser configuration error occurred

Logging system failed to initialize using configuration from 'classpath:logback-spring.xml'
java.lang.IllegalStateException: Could not initialize Logback logging from classpath:logback-spring.xml
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:168)
    at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:66)
    at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:57)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:132)
    at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:316)
    at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:282)
    at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240)
    at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:216)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
    at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
    at java.util.ArrayList.forEach(ArrayList.java:1257)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
    at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
    at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
    at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:339)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:297)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
    at cn.piesat.ScanningApplication.main(ScanningApplication.java:18)
Caused by: ch.qos.logback.core.joran.spi.JoranException: Parser configuration error occurred
    at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:89)
    at ch.qos.logback.core.joran.event.SaxEventRecorder.recordEvents(SaxEventRecorder.java:57)
    at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:151)
    at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:110)
    at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.configureByResourceUrl(LogbackLoggingSystem.java:188)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:165)
    ... 22 more
Caused by: org.xml.sax.SAXNotSupportedException: Feature: http://xml.org/sax/features/external-general-entities
    at org.apache.crimson.parser.XMLReaderImpl.setFeature(XMLReaderImpl.java:211)
    at org.apache.crimson.jaxp.SAXParserImpl.setFeatures(SAXParserImpl.java:143)
    at org.apache.crimson.jaxp.SAXParserImpl.<init>(SAXParserImpl.java:126)
    at org.apache.crimson.jaxp.SAXParserFactoryImpl.newSAXParserImpl(SAXParserFactoryImpl.java:113)
    at org.apache.crimson.jaxp.SAXParserFactoryImpl.setFeature(SAXParserFactoryImpl.java:141)
    at ch.qos.logback.core.joran.event.SaxEventRecorder.buildSaxParser(SaxEventRecorder.java:82)
    ... 28 more
Disconnected from the target VM, address: '127.0.0.1:64222', transport: 'socket'

Process finished with exit code 1

可能是由于jar包冲突,在pom文件中单独引入logback-core的依赖后,问题解决。

<!-- logback 日志 -->
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-core</artifactId>
    <version>1.1.7</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.1.7</version>
    <exclusions>
        <exclusion>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </exclusion>
    </exclusions>
</dependency>

到此这篇关于Springboot使用Logback实现日志配置与异常记录的文章就介绍到这了,更多相关Springboot Logback内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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