三、SpringBoot的日志--bilibili雷丰阳笔记

今天药忘吃喽~ 2023-03-02 13:26 142阅读 0赞

三、springboot与日志

抽象层 SLF4j 实现类logback

日志记录方法

给系统导入slf4j的jar和logback的jar

import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    public class HelloWorld {
      public static void main(String[] args) {
        Logger logger = LoggerFactory.getLogger(HelloWorld.class);
        logger.info("Hello World");
      }

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统一日志记录，即使别的框架

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1 将系统中其他日志框架先排除

2 用中间包来替换原有的日志框架

3 我们导入slf4j其他的实现

idea中

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springboot的底层方式 slf4j+log4j的方式  
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中间的转换包

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我们要引入其他框架，一定要把这个框架的默认日志依赖移除掉

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适配器

/**
     * 在编码的时候进行容器注入
     */
    @RunWith(SpringRunner.class)
    @SpringBootTest
    public class SpringBootApplicationTest {
    
        Logger logger = LoggerFactory.getLogger(getClass());
    
        @Test
        public void contextLoads(){
            //日志级别
            logger.trace("这是trace日志");
            logger.debug("这是debug日志");
            logger.info("info日志");
            logger.warn("warn日志");
            logger.error("error日志");
    
        }
    }

springboot默认日志级别是info

logging.level.com=trace
    #logging.file=springboot.log
    logging.file=d:/springboot.log
    logging.path=/spring/log   #在e:/根目录下
    
    logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread] %logger{15} - %msg%n
    
    logging.pattern.file=

logging.file和logging.path取其一，一般logging.file为主

2、指定配置

给类路径下放上每个日志框架自己的配置文件：SpringBoot就不使用他默认配置

记录系统 定制  
Logback logback-spring.xml, logback-spring.groovy, logback.xml, or logback.groovy  
Log4j2 log4j2-spring.xml or log4j2.xml  
JDK (Java Util Logging) logging.properties

logback-spring.xml

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spring.profiles.active=dev

文件名没有logback-spring.xml spring就报错

排除依赖

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