Spring Boot 日志配置

https://www.bilibili.com/video/BV1iJ411H74S?p=37

示例 无配置文件 默认使用 SLF4J 日志门面 + Logback 日志实现

pom.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">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.2.2.RELEASE</version>
    </parent>

    <groupId>io.github.jihch</groupId>
    <artifactId>spring-boot-log</artifactId>
    <version>1.0-SNAPSHOT</version>

    <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-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

</project>

SpringBootLogApplication.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootLogApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootLogApplication.class, args);
    }

}

SpringBootLogApplicationTests.java

import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class SpringBootLogApplicationTests {

    // 声明日志记录器对象
    public static final Logger LOGGER = LoggerFactory.getLogger(SpringBootLogApplicationTests.class);

    @Test
    public void contextLoads() {
        // 打印日志信息
        LOGGER.error("error");
        LOGGER.warn("warn");
        LOGGER.info("info"); // 默认日志级别
        LOGGER.debug("debug");
        LOGGER.trace("trace");
    }

}

18:07:03.230 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
……

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.2.RELEASE)

2023-02-28 18:07:03.751  INFO 47472 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : Starting SpringBootLogApplicationTests on SK-20210414CLPG with PID 47472 (started by Administrator in E:\record\2023\2\27\spring-boot-log)
2023-02-28 18:07:03.752  INFO 47472 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : No active profile set, falling back to default profiles: default
2023-02-28 18:07:04.614  INFO 47472 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2023-02-28 18:07:04.780  INFO 47472 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : Started SpringBootLogApplicationTests in 1.271 seconds (JVM running for 2.006)
2023-02-28 18:07:04.900 ERROR 47472 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : error
2023-02-28 18:07:04.900  WARN 47472 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : warn
2023-02-28 18:07:04.901  INFO 47472 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : info
2023-02-28 18:07:04.911  INFO 47472 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'

示例 无配置文件 使用 Log4j 2记录日志也还是会经由桥接器使用 SLF4J 日志门面 + Logback 日志实现

SpringBootLogApplicationTests.java

import org.apache.logging.log4j.LogManager;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class SpringBootLogApplicationTests {

    // 声明日志记录器对象
    public static final Logger LOGGER = LoggerFactory.getLogger(SpringBootLogApplicationTests.class);

    @Test
    public void contextLoads() {
        // 打印日志信息
        LOGGER.error("error");
        LOGGER.warn("warn");
        LOGGER.info("info"); // 默认日志级别
        LOGGER.debug("debug");
        LOGGER.trace("trace");

        // 使用 Log4j 2 进行日志记录也还是会通过桥接器切换为 SLF4J 日志门面和 Logback 日志实现
        org.apache.logging.log4j.Logger logger = LogManager.getLogger(SpringBootLogApplicationTests.class);
        logger.info("log4j 2 info");

    }

}

18:19:36.386 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
……

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.2.RELEASE)

2023-02-28 18:19:36.807  INFO 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : Starting SpringBootLogApplicationTests on SK-20210414CLPG with PID 14180 (started by Administrator in E:\record\2023\2\27\spring-boot-log)
2023-02-28 18:19:36.808  INFO 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : No active profile set, falling back to default profiles: default
2023-02-28 18:19:37.601  INFO 14180 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2023-02-28 18:19:37.768  INFO 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : Started SpringBootLogApplicationTests in 1.125 seconds (JVM running for 1.82)
2023-02-28 18:19:37.889 ERROR 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : error
2023-02-28 18:19:37.889  WARN 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : warn
2023-02-28 18:19:37.889  INFO 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : info
2023-02-28 18:19:37.890  INFO 14180 --- [           main] i.g.jihch.SpringBootLogApplicationTests  : log4j 2 info
2023-02-28 18:19:37.904  INFO 14180 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'

Process finished with exit code 0