一、logback介绍
Logback是由log4j创始人设计的另一个开源日志组件,官方网站: logback.qos.ch。它当前分为以下三个模块:
- logback-core:其它两个模块的基础模块。
- logback-classic:它是log4j的一个改良版本,同时它完整实现了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。
默认情况下,Spring Boot会用Logback来记录日志,并用INFO级别输出到控制台。
二、代码工程
实验目标:实现springboot应用打印彩色日志
pom.xml
xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>springboot-demo</artifactId>
<groupId>com.et</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>logback</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.20</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
application.yaml
yaml
server:
port: 8088
logging:
config: classpath:logback-spring.xml
logback-spring.xml
xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="LOG_PATH" value="logs" />
<property name="LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%-5level] %-40.40logger{39} : %msg%n" />
<!-- 控制台输出 -->
<appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
<!-- 彩色日志 -->
<layout class="ch.qos.logback.classic.PatternLayout">
<pattern>
%d{yyyy-MM-dd HH:mm:ss} [%thread] %magenta(%-5level) %green([%-50.50class]) >>> %cyan(%msg) %n
</pattern>
</layout>
</appender>
<!-- 按照每天生成日志文件 -->
<appender name="fileLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!--日志文件输出的文件名-->
<FileNamePattern>${LOG_PATH}/cms.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
<!--日志文件最大的大小-->
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>100MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
<!--日志文件保留天数-->
<MaxHistory>30</MaxHistory>
</rollingPolicy>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<pattern>${LOG_PATTERN}</pattern>
</encoder>
</appender>
<!-- 日志输出级别 -->
<root level="info">
<appender-ref ref="consoleLog" />
<appender-ref ref="fileLog" />
</root>
</configuration>
comtroller
typescript
package com.et.logback.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.HashMap;
import java.util.Map;
@Controller
@Slf4j
public class HelloWorldController {
@RequestMapping("/hello")
@ResponseBody
public Map<String, Object> showHelloWorld(){
log.info("info日志");
Map<String, Object> map = new HashMap<>();
map.put("msg", "HelloWorld");
return map;
}
}
代码仓库
三、测试
启动springboot应用,查看控制台日志,打印彩色日志。如下图所示: