Spring Boot中slf4j日志依赖关系示例详解

<dependency>

  <groupid>org.springframework</groupid>

  <artifactid>spring-core</artifactid>

  <version> 4.3 . 20 .release</version>

  <exclusions>

  <exclusion>

   <artifactid>commons-logging</artifactid>

   <groupid>commons-logging</groupid>

  </exclusion>

  </exclusions>

</dependency>

package com.example.demo;

import org.junit.test;

import org.junit.runner.runwith;

import org.slf4j.logger;

import org.slf4j.loggerfactory;

import org.springframework.boot.test.context.springboottest;

import org.springframework.test.context.junit4.springrunner;

@runwith (springrunner. class )

@springboottest

public class demoapplicationtests {

  logger log = loggerfactory.getlogger(getclass());

  @test

  public void contextloads() {

   log.trace( "trace日志" );

   log.debug( "debug日志" );

   log.info( "info日志" );

   log.warn( "warn日志" );

   log.error( "error日志" );

  }

}

# 指定日志输入级别

logging.level.com.example.demo=trace

# 指定日志输出位置和日志文件名

logging.file=./log/log.txt

# 指定日志输出路径,若file和path同时配置,则file生效

# 此配置默认生成文件为spring.log

#logging.path=./log

# 控制台日志输出格式

# - 5 表示从左显示 5 个字符宽度

logging.pattern.console=%d{yyyy-mm-dd hh:mm:ss.sss} %highlight(%-5level) %boldyellow(%thread) | %boldgreen(%logger) | %msg%n

# 文件中输出的格式

logging.pattern.file=%d{yyyy-mm-dd hh:mm:ss.sss} = [%thread] = %-5level = %logger{ 50 } - %msg%n