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033_使用Slf4j和logback日志

科牛 2022-02-04 阅读 123

1. 使用maven构建SpringBoot的名叫spring-boot-slf4j-logback项目

2. 配置pom.xml

<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">
	
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.bjbs</groupId>
	<artifactId>spring-boot-slf4j-logback</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.13.RELEASE</version>
	</parent>
	
	<properties>
		<java.version>1.8</java.version>
	</properties>
	
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>
</project>

3. 只添加了spring-boot-starter-web启动器, 在Dependency Hierarchy中查看, 已经有了slf4j和logback日志包。

4. 在src/main/resources下, 新建logback.xml。

<configuration>

	<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
		<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
			<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
		</encoder>
	</appender>

	<appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
		<file>log/my.log</file>   
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<fileNamePattern>log/my.%d{yyyy-MM-dd}.log</fileNamePattern> 
			<maxHistory>30</maxHistory>   
		</rollingPolicy>  
		<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">    
			<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> 
		</encoder> 
	</appender>

	<root level="info">
		<appender-ref ref="file" />
		<appender-ref ref="stdout" />
	</root>

</configuration>

5. 新建App.java启动器类, 使用日志记录。

package com.bjbs;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class App {
	private static final Logger logger = LoggerFactory.getLogger(App.class);
	
	public static void main(String[] args) {
		logger.info("Spring Boot start...");
		SpringApplication.run(App.class, args);
		logger.info("Spring Boot running...");
	}
}

6. 运行项目, 查看控制台日志

7. 生成log文件夹, 该文件夹下生成my.log日志文件

8. 查看my.log日志文件

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