SpringBoot(八)----SpringBoot配置日志文件

今天介绍一下SpringBoot配置日志文件

SpringBoot在所有的内部日志中使用Commons Logging，但是默认配置也提供了对常用日志的支持，如Java Util Logging，Log4J，Log4J2和Logback。但是每种Logger都可以通过配置使用控制台或者文件输出日志内容。

一.SpringBoot默认日志Logback

SLF4J,是一个针对各类Java日志框架的统一Façade抽象。Java有很多的日志框架，如java.util.logging，log4j，logback，commons-logging，Spring框架使用的是Jakarta Commons Logging API(JCL)。而SLF4J定义了统一的日志抽象接口，而真正的日志实现则是在运行决定的。

Logback是log4j框架的作者开发的新一代日志框架，它能够适应诸多运行环境，支持SLF4J。

默认情况下，SpringBoot使用SLF4J+Logback记录日志。

二.日志输出的内容元素

日志输出的内容元素具体如下：

时间日期：精确到毫秒

日志级别：ERROR，WARN，INFO，DEBUG，TRACE

进程ID

分隔符：---标识实际日志的开始

线程名：方括号括起来的内容

Logger名：通常为源代码类名

日志内容

三.添加日志依赖

网上给出的日志依赖为：

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

Spring boot应用将自动使用logback作为应用日志框架，Spring Boot启动的时候，由org.springframework.boot.logging.Logging-Application-Listener根据情况初始化并使用。spring-boot-starter中包含spring-boot-starter-logging,该依赖内容就是Spring boot默认的日志框架logback。

我自己使用的依赖如下：

<dependency>      <groupId>org.slf4j</groupId>      <artifactId>slf4j-api</artifactId>      <version>1.7.20</version>
</dependency>
<!-- 添加logback-classic依赖 -->
<dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
</dependency>
<!-- 添加logback-core依赖 -->
<dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
</dependency>

四.控制台输出

日志级别从低到高分别是TRACE<DEBUG<INFO<WARN<ERROR<FATAL，如果设置为WARN，则低于WARN的信息都不会被输出。

SpringBoot中默认配置ERROR、WARN和INFO级别的日志输出到控制台。

在application.properties中配置logging.level.包名=‘日志级别’，可以控制控制台输出日志级别，举个例子：

首先，建一个springboot项目，项目目录如下：

第二步，配置pom.xml文件，加入jar包

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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>springboot_002</groupId>
	<artifactId>springboot_002</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>springboot_002 Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.7.20</version>
		</dependency>
		<!-- 添加logback-classic依赖 -->
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-classic</artifactId>
		</dependency>
		<!-- 添加logback-core依赖 -->
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-core</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<exclusions>
				<exclusion>
					<groupId>org.springframework.boot</groupId>
					<artifactId>spring-boot-starter-tomcat</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<!-- 继承父包 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.3.RELEASE</version>
	</parent>
	<build>
		<finalName>springboot_002</finalName>
	</build>
</project>

第三步，在src/main/java目录下建包com.zk.myspringboot，并创建一个SpringBootApplicationFirst.java启动类。

SpringBootApplicationFirst.java

package com.zk.myspringboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.support.SpringBootServletInitializer;

@SpringBootApplication
public class SpringBootApplicationFirst extends SpringBootServletInitializer{
	public static void main(String[]args){
        SpringApplication.run(SpringBootApplicationFirst.class, args);
    }
}

第四步，在src/main/resources目录下配置application.properties文件，在application.properties中配置日志等级，如下：

logging.level.com.zk=debug

这里的日志级别等级可以更改。

最后，我们在src/test/java下创建包com.zk.myspringboot(测试类包名需要与启动类包名保持一致),并在包中创建一个测试类SpringBootApplicationTest.java。

SpringBootApplicationTest.java

package com.zk.myspringboot;

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 SpringBootApplicationTests {
	//日志的级别
	/*
	 * 日志的级别是由高到低的
	 * SpringBoot默认日志级别---info级别
	 * trace>debug>info>warn>error
	 */
	//记录器
	Logger logger=LoggerFactory.getLogger(getClass());
	@Test
	public void contextLoads() {
		logger.trace("这是trace日志...");
		logger.debug("这是debug日志...");
		logger.info("这是info日志...");
		logger.warn("这是warn日志...");
		logger.error("这是error日志...");
	}
}

我们启动测试类，执行结果如下：　

可以看到日志的输出内容。

当然我们可以通过配置属性文件中的logging.file或者logging.path将日志文件输出到单独的文件中，需要注意的的是，这两个配置文件的属性值不可同时使用，否则

只有logging.file生效。

一．如果我们配置

logging.file=SpringBoot.log

则在工程目录下会生成一个SpringBoot.log文件。

日志文件内容如下：

2020-04-08 16:38:31.006  INFO 20008 --- [main] c.z.m.SpringBootApplicationTests         : Starting SpringBootApplicationTests on zhangkun0400 with PID 20008 (started by zhangkun04 in D:\eclipseworkspace\springboot_002)
2020-04-08 16:38:31.006 DEBUG 20008 --- [main] c.z.m.SpringBootApplicationTests         : Running with Spring Boot v1.4.3.RELEASE, Spring v4.3.5.RELEASE
2020-04-08 16:38:31.007  INFO 20008 --- [main] c.z.m.SpringBootApplicationTests         : No active profile set, falling back to default profiles: default
2020-04-08 16:38:31.036  INFO 20008 --- [main] o.s.w.c.s.GenericWebApplicationContext   : Refreshing org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:38:31 CST 2020]; root of context hierarchy
2020-04-08 16:38:32.802  INFO 20008 --- [main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:38:31 CST 2020]; root of context hierarchy
2020-04-08 16:38:32.842  INFO 20008 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2020-04-08 16:38:32.844  INFO 20008 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2020-04-08 16:38:32.870  INFO 20008 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:38:32.870  INFO 20008 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:38:32.901  INFO 20008 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:38:33.050  INFO 20008 --- [main] c.z.m.SpringBootApplicationTests         : Started SpringBootApplicationTests in 2.379 seconds (JVM running for 3.06)
2020-04-08 16:38:33.073 DEBUG 20008 --- [main] c.z.m.SpringBootApplicationTests         : 这是debug日志...
2020-04-08 16:38:33.073  INFO 20008 --- [main] c.z.m.SpringBootApplicationTests         : 这是info日志...
2020-04-08 16:38:33.074  WARN 20008 --- [main] c.z.m.SpringBootApplicationTests         : 这是warn日志...
2020-04-08 16:38:33.074 ERROR 20008 --- [main] c.z.m.SpringBootApplicationTests         : 这是error日志...
2020-04-08 16:38:33.080  INFO 20008 --- [Thread-1] o.s.w.c.s.GenericWebApplicationContext   : Closing org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:38:31 CST 2020]; root of context hierarchy
2020-04-08 16:46:06.593  INFO 14984 --- [main] c.z.m.SpringBootApplicationTests         : Starting SpringBootApplicationTests on zhangkun0400 with PID 14984 (started by zhangkun04 in D:\eclipseworkspace\springboot_002)
2020-04-08 16:46:06.594 DEBUG 14984 --- [main] c.z.m.SpringBootApplicationTests         : Running with Spring Boot v1.4.3.RELEASE, Spring v4.3.5.RELEASE
2020-04-08 16:46:06.594  INFO 14984 --- [main] c.z.m.SpringBootApplicationTests         : No active profile set, falling back to default profiles: default
2020-04-08 16:46:06.623  INFO 14984 --- [main] o.s.w.c.s.GenericWebApplicationContext   : Refreshing org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:46:06 CST 2020]; root of context hierarchy
2020-04-08 16:46:07.968  INFO 14984 --- [main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:46:06 CST 2020]; root of context hierarchy
2020-04-08 16:46:08.052  INFO 14984 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2020-04-08 16:46:08.053  INFO 14984 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2020-04-08 16:46:08.101  INFO 14984 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:46:08.102  INFO 14984 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:46:08.157  INFO 14984 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:46:08.410  INFO 14984 --- [main] c.z.m.SpringBootApplicationTests         : Started SpringBootApplicationTests in 2.123 seconds (JVM running for 2.649)
2020-04-08 16:46:08.449 DEBUG 14984 --- [main] c.z.m.SpringBootApplicationTests         : 这是debug日志...
2020-04-08 16:46:08.450  INFO 14984 --- [main] c.z.m.SpringBootApplicationTests         : 这是info日志...
2020-04-08 16:46:08.450  WARN 14984 --- [main] c.z.m.SpringBootApplicationTests         : 这是warn日志...
2020-04-08 16:46:08.451 ERROR 14984 --- [main] c.z.m.SpringBootApplicationTests         : 这是error日志...
2020-04-08 16:46:08.460  INFO 14984 --- [Thread-1] o.s.w.c.s.GenericWebApplicationContext   : Closing org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:46:06 CST 2020]; root of context hierarchy
2020-04-08 21:07:59.766  INFO 15932 --- [main] c.z.m.SpringBootApplicationTests         : Starting SpringBootApplicationTests on zhangkun0400 with PID 15932 (started by zhangkun04 in D:\eclipseworkspace\springboot_002)
2020-04-08 21:07:59.768 DEBUG 15932 --- [main] c.z.m.SpringBootApplicationTests         : Running with Spring Boot v1.4.3.RELEASE, Spring v4.3.5.RELEASE
2020-04-08 21:07:59.769  INFO 15932 --- [main] c.z.m.SpringBootApplicationTests         : No active profile set, falling back to default profiles: default
2020-04-08 21:07:59.814  INFO 15932 --- [main] o.s.w.c.s.GenericWebApplicationContext   : Refreshing org.s[email protected]5d0a1059: startup date [Wed Apr 08 21:07:59 CST 2020]; root of context hierarchy
2020-04-08 21:08:01.360  INFO 15932 --- [main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.s[email protected]5d0a1059: startup date [Wed Apr 08 21:07:59 CST 2020]; root of context hierarchy
2020-04-08 21:08:01.418  INFO 15932 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2020-04-08 21:08:01.420  INFO 15932 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2020-04-08 21:08:01.447  INFO 15932 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 21:08:01.448  INFO 15932 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 21:08:01.487  INFO 15932 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 21:08:01.639  INFO 15932 --- [main] c.z.m.SpringBootApplicationTests         : Started SpringBootApplicationTests in 2.275 seconds (JVM running for 3.022)
2020-04-08 21:08:01.661 DEBUG 15932 --- [main] c.z.m.SpringBootApplicationTests         : 这是debug日志...
2020-04-08 21:08:01.661  INFO 15932 --- [main] c.z.m.SpringBootApplicationTests         : 这是info日志...
2020-04-08 21:08:01.661  WARN 15932 --- [main] c.z.m.SpringBootApplicationTests         : 这是warn日志...
2020-04-08 21:08:01.661 ERROR 15932 --- [main] c.z.m.SpringBootApplicationTests         : 这是error日志...
2020-04-08 21:08:01.665  INFO 15932 --- [Thread-1] o.s.w.c.s.GenericWebApplicationContext   : Closing org.s[email protected]5d0a1059: startup date [Wed Apr 08 21:07:59 CST 2020]; root of context hierarchy

二．如果我们配置的是loggin.path，如下：

logging.path=/spring/log

则会在我们项目的磁盘下创建一个log文件，

spring.log日志文件内容如下：

2020-04-08 16:51:48.278  INFO 16368 --- [main] c.z.m.SpringBootApplicationTests         : Starting SpringBootApplicationTests on zhangkun0400 with PID 16368 (started by zhangkun04 in D:\eclipseworkspace\springboot_002)
2020-04-08 16:51:48.279 DEBUG 16368 --- [main] c.z.m.SpringBootApplicationTests         : Running with Spring Boot v1.4.3.RELEASE, Spring v4.3.5.RELEASE
2020-04-08 16:51:48.280  INFO 16368 --- [main] c.z.m.SpringBootApplicationTests         : No active profile set, falling back to default profiles: default
2020-04-08 16:51:48.323  INFO 16368 --- [main] o.s.w.c.s.GenericWebApplicationContext   : Refreshing org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:51:48 CST 2020]; root of context hierarchy
2020-04-08 16:51:51.273  INFO 16368 --- [main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:51:48 CST 2020]; root of context hierarchy
2020-04-08 16:51:51.402  INFO 16368 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2020-04-08 16:51:51.404  INFO 16368 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2020-04-08 16:51:51.469  INFO 16368 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:51:51.470  INFO 16368 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:51:51.560  INFO 16368 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-04-08 16:51:51.936  INFO 16368 --- [main] c.z.m.SpringBootApplicationTests         : Started SpringBootApplicationTests in 4.249 seconds (JVM running for 5.196)
2020-04-08 16:51:51.996 DEBUG 16368 --- [main] c.z.m.SpringBootApplicationTests         : 这是debug日志...
2020-04-08 16:51:51.997  INFO 16368 --- [main] c.z.m.SpringBootApplicationTests         : 这是info日志...
2020-04-08 16:51:51.998  WARN 16368 --- [main] c.z.m.SpringBootApplicationTests         : 这是warn日志...
2020-04-08 16:51:51.999 ERROR 16368 --- [main] c.z.m.SpringBootApplicationTests         : 这是error日志...
2020-04-08 16:51:52.038  INFO 16368 --- [Thread-1] o.s.w.c.s.GenericWebApplicationContext   : Closing org.s[email protected]5d0a1059: startup date [Wed Apr 08 16:51:48 CST 2020]; root of context hierarchy

参考网址如下：https://blog.csdn.net/qq_37859539/article/details/82464745

原文地址：https://www.cnblogs.com/longlyseul/p/12663155.html

时间： 2024-10-07 05:09:32

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