标签：obj 环境 webjars tail apach 生成 情况下 image servlet
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。
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。
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
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>
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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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.springframework.web.context.support.GenericWebApplicationContext@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
SpringBoot(八)----SpringBoot配置日志文件
标签：obj 环境 webjars tail apach 生成 情况下 image servlet
原文地址：https://www.cnblogs.com/longlyseul/p/12663155.html
