一.springboot預設日誌配置

    1.springboot預設日誌配置是使用logback

     2.引用springboot依賴包時會自動載入依賴jar包

     3.專案中配置logback

 ===========引用springboot依賴的pom

<?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">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.spf.demo</groupId>
    <artifactId>spf-demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.45</version>
        </dependency>
    </dependencies>

 
</project>
 

     ======application.properties檔案

###Tomcat Config
server.port=8080
server.tomcat.uri-encoding=UTF-8

####DataSource Config
spring.datasource.platform=mysql
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/lpinfo?useSSL=false&useUnicode=true&characterEncoding=utf8
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=123456

###SPBdefaultLoggin Config
logging.level.root=info
 

package com.spf.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;

/**
 * Unit test for simple App.
 */


@RunWith(SpringRunner.class)
@SpringBootTest(classes = AppTest.class)
public class AppTest {
    Logger logger = LoggerFactory.getLogger(getClass());

    // 日誌輸出等級 高>低   error > warn > info > debug >trace
    //SpringBoot預設是info級別，只會輸出info及以上級別的日誌
    @Test
    public void test() {
        logger.error("如果配置檔案日誌等級error--->[日誌只能輸出error等級日誌]");
        logger.warn("如果配置檔案日誌等級warn--->[日誌只能輸出error,warn等級日誌]");
        logger.info("如果配置檔案日誌等級info--->[日誌只能輸出error,warn,info等級日誌]");
        logger.debug("如果配置檔案日誌等級debug--->[日誌只能輸出error,warn,info,debug等級日誌]");
        logger.trace("如果配置檔案日誌等級trace--->[日誌只能輸出error,warn,info,debug,trace等級日誌]");
    }

}
 

執行結果:

二.springboot預設日誌logback的詳細配置

   1.日誌引數配置

     application.properties中如果配置 logging.file 和logging.path

logging.file:   # 日誌檔案,絕對路徑或相對路徑
logging.path:   # 儲存日誌檔案目錄路徑
logging.config: # 日誌配置檔案,Spring Boot預設使用classpath路徑下的日誌配置檔案,如:logback.xml
logging.level.xxx:  # 日誌級別