SpringBoot实战之3 整合slf4j+logback日志框架

绝地灬酷狼 2022-06-04 05:41 292阅读 0赞

## 前言 ##

日志系统几乎是每个项目必备的重要组成部分。但logback和log4j以及log4j2三者，推荐使用logback，因为logback的效率显著高于log4j，而且logback也是springboot推荐及默认使用的日志系统。

## 方法 ##

在Spring Boot 中记录日志只需两步：

1、在 src/main/resources 下面创建logback.xml 文件。

2、在Java代码中创建实例，并在需要输出日志的地方使用。

## code实现 ##

在src/main/resources新建logback.xml

<?xml version="1.0" encoding="utf-8"?>
    <configuration scan="true" scanPeriod="10 seconds">
    
        
        <property name="pattern" value="%d{yyyy-MM-dd HH:mm:ss.SSS} -%5p ${PID:-} [%15.15t] %-40.40logger{39} : %m%n" />
        <property name="charsetEncoding" value="UTF-8" />
        
    
        
        <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>${pattern}</pattern>
                <charset>UTF-8</charset>
            </encoder>
        </appender>
    
        <appender name="file" class="ch.qos.logback.core.FileAppender">
            <file>./logback/logfile.log</file>
            <append>true</append>
            <encoder>
                <pattern>${pattern}</pattern>
                <charset>${charsetEncoding}</charset>
            </encoder>
        </appender>
    
        <appender name="dailyRollingFileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <File>./logback/log.log</File>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <FileNamePattern>logback.%d{yyyy-MM-dd_HH}.log</FileNamePattern>
                
                <maxHistory>7</maxHistory>
            </rollingPolicy>
            <encoder>
                <Pattern>${pattern}</Pattern>
            </encoder>
        </appender>
    
        <logger name="org.springframework.web" level="debug"/>
        
        <logger name="org.hibernate.type.descriptor.sql.BasicBinder" level="TRACE" />
        <logger name="org.hibernate.type.descriptor.sql.BasicExtractor" level="DEBUG" />
        <logger name="org.hibernate.SQL" level="DEBUG" />
        <logger name="org.hibernate.engine.QueryParameters" level="DEBUG" />
        <logger name="org.hibernate.engine.query.HQLQueryPlan" level="DEBUG" />
    
        
        <logger name="com.apache.ibatis" level="TRACE"/>
        <logger name="java.sql.Connection" level="DEBUG"/>
        <logger name="java.sql.Statement" level="DEBUG"/>
        <logger name="java.sql.PreparedStatement" level="DEBUG"/>
    
        <root level="debug">
            <appender-ref ref="console"/>
            <appender-ref ref="dailyRollingFileAppender"/>
            <appender-ref ref="file"/>
        </root>
    </configuration>

代码

@SpringBootApplication
    public class LogbackApplication { 
        private final static Logger _logger = LoggerFactory.getLogger(LogbackApplication.class);
        public static void main(String[] args) {
            for(int i=0;i<10;i++){
                _logger.info("this is springboot main");
            }
            SpringApplication.run(LogbackApplication.class,args);
        }
    }

以上运行的效果

## 文件日志 ##

系统日志全部写在一个文件会导致文件越来越大，这时候可以用文件日志来切分控制台日志

<appender name="dailyRollingFileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>/usr/local/log/app.log</File>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            
            <FileNamePattern>logback.%d{yyyy-MM-dd}.log</FileNamePattern>
            
            <maxHistory>30</maxHistory>
        </rollingPolicy>
        <encoder>
            <Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{35} - %msg %n</Pattern>
        </encoder>
    </appender>

logback.%d\{yyyy-MM-dd\}.log定义了日志的切分方式——把每一天的日志归档到一个文件中，30表示只保留最近30天的日志，以防止日志填满整个磁盘空间。同理，可以使用%d\{yyyy-MM-dd HH:mm:ss SSS\}来定义精确到分的日志切分方式。

## 运行效果图 ##

![这里写图片描述][springboot-slf4j-logback.png]

![这里写图片描述][springboot-slf4j-logback2.png]

## 历史文章 ##

[SpringBoot实战之入门][SpringBoot]

[springboot实战之文章汇总][springboot]

[springboot实战之读取配置文件][springboot 1]

[springboot实战之整合jsp模版引擎][springboot_jsp]

[springboot实战之整合freemarker模版引擎][springboot_freemarker]

[springboot实战之注册自定义Servlet][springboot_Servlet]

[springboot实战之注册filter和listener][springboot_filter_listener]

[springboot实战之注册interceptor][springboot_interceptor]

[springboot实战之整合slf4j日志系统][springboot_slf4j]

[springboot实战之整合CommandLineRunner][springboot_CommandLineRunner]

[springboot-slf4j-logback.png]: https://github.com/shiyuan2he/springboot/blob/master/springboot-logback/images/springboot-slf4j-logback.png
[springboot-slf4j-logback2.png]: https://github.com/shiyuan2he/springboot/blob/master/springboot-logback/images/springboot-slf4j-logback2.png
[SpringBoot]: http://blog.csdn.net/u012806787/article/details/78694912
[springboot]: http://blog.csdn.net/u012806787/article/details/78686998
[springboot 1]: http://blog.csdn.net/u012806787/article/details/78583814
[springboot_jsp]: http://blog.csdn.net/u012806787/article/details/78700999
[springboot_freemarker]: http://blog.csdn.net/u012806787/article/details/78706156
[springboot_Servlet]: http://blog.csdn.net/u012806787/article/details/78710113
[springboot_filter_listener]: http://blog.csdn.net/u012806787/article/details/78715725
[springboot_interceptor]: http://blog.csdn.net/u012806787/article/details/78719429
[springboot_slf4j]: http://blog.csdn.net/u012806787/article/details/78725259
[springboot_CommandLineRunner]: http://blog.csdn.net/u012806787/article/details/78722025