【 SpringBoot 日志配置 】—— 日志使用
程序员文章站
2022-06-13 15:33:53
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1、默认配置
SpringBoot 默认帮我们配置好了日志
编写测试类
package cn.ys.springboot03logging;
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 Springboot03LoggingApplicationTests {
//记录器
Logger logger = LoggerFactory.getLogger(getClass());
@Test
public void contextLoads() {
//System.out.println();
//日志的级别；
//由低到高 trace<debug<info<warn<error
//可以调整输出的日志级别；日志就只会在这个级别以以后的高级别生效
logger.trace("这是trace日志...");
logger.debug("这是debug日志...");
//SpringBoot 默认给我们使用的是 info 级别的，没有指定级别的就用 SpringBoot 默认规定的级别；root级别
logger.info("这是info日志...");
logger.warn("这是warn日志...");
logger.error("这是error日志...");
}
}
运行测试类，控制台打印
C:\Java\jdk1.8.0_181\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2018.2.1\lib\idea_rt.jar=62556:C:\Program Files\JetBrains\IntelliJ IDEA 2018.2.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2018.2.1\lib\idea_rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2018.2.1\plugins\junit\lib\junit-rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2018.2.1\plugins\junit\lib\junit5-rt.jar;C:\Java\jdk1.8.0_181\jre\lib\charsets.jar;C:\Java\jdk1.8.0_181\jre\lib\deploy.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\access-bridge-64.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\cldrdata.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\dnsns.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\jaccess.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\jfxrt.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\localedata.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\nashorn.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\sunec.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\sunjce_provider.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\sunmscapi.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\sunpkcs11.jar;C:\Java\jdk1.8.0_181\jre\lib\ext\zipfs.jar;C:\Java\jdk1.8.0_181\jre\lib\javaws.jar;C:\Java\jdk1.8.0_181\jre\lib\jce.jar;C:\Java\jdk1.8.0_181\jre\lib\jfr.jar;C:\Java\jdk1.8.0_181\jre\lib\jfxswt.jar;C:\Java\jdk1.8.0_181\jre\lib\jsse.jar;C:\Java\jdk1.8.0_181\jre\lib\management-agent.jar;C:\Java\jdk1.8.0_181\jre\lib\plugin.jar;C:\Java\jdk1.8.0_181\jre\lib\resources.jar;C:\Java\jdk1.8.0_181\jre\lib\rt.jar;C:\Users\ys951\Desktop\JavaSETest\SpringBoot\springboot-03-logging\target\test-classes;C:\Users\ys951\Desktop\JavaSETest\SpringBoot\springboot-03-logging\target\classes;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.1.3.RELEASE\spring-boot-starter-web-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-starter\2.1.3.RELEASE\spring-boot-starter-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot\2.1.3.RELEASE\spring-boot-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.1.3.RELEASE\spring-boot-autoconfigure-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.1.3.RELEASE\spring-boot-starter-logging-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\ys951\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\ys951\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.11.2\log4j-to-slf4j-2.11.2.jar;C:\Users\ys951\.m2\repository\org\apache\logging\log4j\log4j-api\2.11.2\log4j-api-2.11.2.jar;C:\Users\ys951\.m2\repository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;C:\Users\ys951\.m2\repository\javax\annotation\javax.annotation-api\1.3.2\javax.annotation-api-1.3.2.jar;C:\Users\ys951\.m2\repository\org\yaml\snakeyaml\1.23\snakeyaml-1.23.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.1.3.RELEASE\spring-boot-starter-json-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.9.8\jackson-databind-2.9.8.jar;C:\Users\ys951\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.9.0\jackson-annotations-2.9.0.jar;C:\Users\ys951\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.9.8\jackson-core-2.9.8.jar;C:\Users\ys951\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.9.8\jackson-datatype-jdk8-2.9.8.jar;C:\Users\ys951\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.9.8\jackson-datatype-jsr310-2.9.8.jar;C:\Users\ys951\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.9.8\jackson-module-parameter-names-2.9.8.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\2.1.3.RELEASE\spring-boot-starter-tomcat-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.16\tomcat-embed-core-9.0.16.jar;C:\Users\ys951\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.16\tomcat-embed-el-9.0.16.jar;C:\Users\ys951\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.16\tomcat-embed-websocket-9.0.16.jar;C:\Users\ys951\.m2\repository\org\hibernate\validator\hibernate-validator\6.0.14.Final\hibernate-validator-6.0.14.Final.jar;C:\Users\ys951\.m2\repository\javax\validation\validation-api\2.0.1.Final\validation-api-2.0.1.Final.jar;C:\Users\ys951\.m2\repository\org\jboss\logging\jboss-logging\3.3.2.Final\jboss-logging-3.3.2.Final.jar;C:\Users\ys951\.m2\repository\com\fasterxml\classmate\1.4.0\classmate-1.4.0.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-web\5.1.5.RELEASE\spring-web-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-beans\5.1.5.RELEASE\spring-beans-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-webmvc\5.1.5.RELEASE\spring-webmvc-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-aop\5.1.5.RELEASE\spring-aop-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-context\5.1.5.RELEASE\spring-context-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-expression\5.1.5.RELEASE\spring-expression-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-starter-test\2.1.3.RELEASE\spring-boot-starter-test-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-test\2.1.3.RELEASE\spring-boot-test-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\boot\spring-boot-test-autoconfigure\2.1.3.RELEASE\spring-boot-test-autoconfigure-2.1.3.RELEASE.jar;C:\Users\ys951\.m2\repository\com\jayway\jsonpath\json-path\2.4.0\json-path-2.4.0.jar;C:\Users\ys951\.m2\repository\net\minidev\json-smart\2.3\json-smart-2.3.jar;C:\Users\ys951\.m2\repository\net\minidev\accessors-smart\1.2\accessors-smart-1.2.jar;C:\Users\ys951\.m2\repository\org\ow2\asm\asm\5.0.4\asm-5.0.4.jar;C:\Users\ys951\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\ys951\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\ys951\.m2\repository\org\assertj\assertj-core\3.11.1\assertj-core-3.11.1.jar;C:\Users\ys951\.m2\repository\org\mockito\mockito-core\2.23.4\mockito-core-2.23.4.jar;C:\Users\ys951\.m2\repository\net\bytebuddy\byte-buddy\1.9.10\byte-buddy-1.9.10.jar;C:\Users\ys951\.m2\repository\net\bytebuddy\byte-buddy-agent\1.9.10\byte-buddy-agent-1.9.10.jar;C:\Users\ys951\.m2\repository\org\objenesis\objenesis\2.6\objenesis-2.6.jar;C:\Users\ys951\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\ys951\.m2\repository\org\hamcrest\hamcrest-library\1.3\hamcrest-library-1.3.jar;C:\Users\ys951\.m2\repository\org\skyscreamer\jsonassert\1.5.0\jsonassert-1.5.0.jar;C:\Users\ys951\.m2\repository\com\vaadin\external\google\android-json\0.0.20131108.vaadin1\android-json-0.0.20131108.vaadin1.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-core\5.1.5.RELEASE\spring-core-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-jcl\5.1.5.RELEASE\spring-jcl-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\springframework\spring-test\5.1.5.RELEASE\spring-test-5.1.5.RELEASE.jar;C:\Users\ys951\.m2\repository\org\xmlunit\xmlunit-core\2.6.2\xmlunit-core-2.6.2.jar" com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 -junit4 cn.ys.springboot03logging.Springboot03LoggingApplicationTests,contextLoads
22:46:41.743 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:41.749 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
22:46:41.763 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
22:46:41.788 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
22:46:41.810 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests], using SpringBootContextLoader
22:46:41.815 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]: class path resource [cn/ys/springboot03logging/Springboot03LoggingApplicationTests-context.xml] does not exist
22:46:41.816 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]: class path resource [cn/ys/springboot03logging/Springboot03LoggingApplicationTestsContext.groovy] does not exist
22:46:41.816 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]: no resource found for suffixes {-context.xml, Context.groovy}.
22:46:41.817 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]: Springboot03LoggingApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
22:46:41.875 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:41.998 [main] DEBUG org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider - Identified candidate component class: file [C:\Users\ys951\Desktop\JavaSETest\SpringBoot\springboot-03-logging\target\classes\cn\ys\springboot03logging\Springboot03LoggingApplication.class]
22:46:42.001 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration cn.ys.springboot03logging.Springboot03LoggingApplication for test class cn.ys.springboot03logging.Springboot03LoggingApplicationTests
22:46:42.199 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]: using defaults.
22:46:42.200 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]
22:46:42.222 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
22:46:42.223 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
22:46:42.223 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@3d680b5a, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@4b5d6a01, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@4a22f9e2, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@3c419631, org.springframework.test.context.support.DirtiesContextTestExecutionListener@418e7838, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@61230f6a, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@3c130745, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@cd3fee8, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@3e2e18f2, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@470f1802]
22:46:42.226 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.228 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]22:46:42.243 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.243 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]22:46:42.245 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.246 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.247 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.247 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.254 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@39529185 testClass = Springboot03LoggingApplicationTests, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [WebMergedContextConfiguration@72f926e6 testClass = Springboot03LoggingApplicationTests, locations = '{}', classes = '{class cn.ys.springboot03logging.Springboot03LoggingApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@6e0e048a, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@23e028a9, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@72b6cbcc, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@51cdd8a], resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map['org.springframework.test.context.web.ServletTestExecutionListener.activateListener' -> true]], class annotated with @DirtiesContext [false] with mode [null].
22:46:42.255 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.255 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [cn.ys.springboot03logging.Springboot03LoggingApplicationTests]
22:46:42.296 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=-1}
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.3.RELEASE)
2019-03-03 22:46:42.731 INFO 14856 --- [ main] .y.s.Springboot03LoggingApplicationTests : Starting Springboot03LoggingApplicationTests on DESKTOP-10FVA01 with PID 14856 (started by ys951 in C:\Users\ys951\Desktop\JavaSETest\SpringBoot\springboot-03-logging)
2019-03-03 22:46:42.732 INFO 14856 --- [ main] .y.s.Springboot03LoggingApplicationTests : No active profile set, falling back to default profiles: default
2019-03-03 22:46:44.624 INFO 14856 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-03-03 22:46:45.099 INFO 14856 --- [ main] .y.s.Springboot03LoggingApplicationTests : Started Springboot03LoggingApplicationTests in 2.781 seconds (JVM running for 4.134)
2019-03-03 22:46:45.401 INFO 14856 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是info日志...
2019-03-03 22:46:45.401 WARN 14856 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是warn日志...
2019-03-03 22:46:45.401 ERROR 14856 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是error日志...
2019-03-03 22:46:45.408 INFO 14856 --- [ Thread-2] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
Process finished with exit code 0
说明：
日志的级别：由低到高trace < debug < info < warn < error < fatal
可以调整输出的日志级别：日志就只会在这个级别以后的高级别生效
SpringBoot 默认给我们使用的是 info 级别的，没有指定级别的就用 SpringBoot 默认规定的级别；root级别
所以，上面只会显示 info、warn、error
2、修改日志的级别
修改 application.properties
logging.level.cn.ys=trace
启动测试类，控制台打印
2019-03-03 23:58:36.806 INFO 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : Starting Springboot03LoggingApplicationTests on DESKTOP-10FVA01 with PID 1436 (started by ys951 in C:\Users\ys951\Desktop\JavaSETest\SpringBoot\springboot-03-logging)
2019-03-03 23:58:36.807 DEBUG 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : Running with Spring Boot v2.1.3.RELEASE, Spring v5.1.5.RELEASE
2019-03-03 23:58:36.808 INFO 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : No active profile set, falling back to default profiles: default
2019-03-03 23:58:38.636 INFO 1436 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-03-03 23:58:39.096 INFO 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : Started Springboot03LoggingApplicationTests in 2.763 seconds (JVM running for 4.074)
2019-03-03 23:58:39.405 TRACE 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是trace日志...
2019-03-03 23:58:39.405 DEBUG 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是debug日志...
2019-03-03 23:58:39.405 INFO 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是info日志...
2019-03-03 23:58:39.405 WARN 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是warn日志...
2019-03-03 23:58:39.405 ERROR 1436 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是error日志...
2019-03-03 23:58:39.412 INFO 1436 --- [ Thread-2] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
Process finished with exit code 0
由于设置的为 trace 级别，故打印 该级别以上的所以日志。
3、设置日志的输出路径
修改 application.properties，指定 logging.file
logging.level.cn.ys=trace
# 设置日志的输出路径
# 不指定路径，在当前项目下生成 springboot.log 日志
# 也可以指定完整路径 D:/springboot.log
logging.file=springboot.log
修改 application.properties，指定 logging.path
logging.level.cn.ys=trace
# 设置日志的输出路径
# 不指定路径，在当前项目下生成 springboot.log 日志
# 也可以指定完整路径 D:/springboot.log
# logging.file=springboot.log
# 在当前磁盘的根路径下创建spring文件夹和里面的log文件夹；使用 spring.log 作为默认文件
logging.path=/spring/log
启动 测试类，由于项目在 C盘，故在 C:\spring\log 下输出 spring.log
| logging.file | logging.path | Example | Description |
|---|---|---|---|
| (none) | (none) | 只在控制台输出 | |
| 指定文件名 | (none) | my.log | 输出日志到my.log文件 |
| (none) | 指定目录 | /var/log | 输出到指定目录的 spring.log 文件中 |
4、设置日志的输出格式
2019-03-04 00:37:32.402 ERROR 10236 --- [ main] .y.s.Springboot03LoggingApplicationTests : 这是error日志...
说明：上述分别为
日志时间 日志级别 线程名 --- 主线程 全类名 消息
日志输出格式：
- %d表示日期时间
- %thread表示线程名
- %‐5level：级别从左显示5个字符宽度
- %logger{50} 表示logger名字长50个字符，否则按照句点分割
- %msg：日志消息
- %n是换行符
例子： %d{yyyy‐MM‐dd HH:mm:ss.SSS} [%thread] %‐5level %logger{50} ‐ %msg%n
修改 application.properties
logging.level.cn.ys=trace
# 设置日志的输出路径
# 不指定路径，在当前项目下生成 springboot.log 日志
# 也可以指定完整路径 D:/springboot.log
# logging.file=springboot.log
# 在当前磁盘的根路径下创建spring文件夹和里面的log文件夹；使用 spring.log 作为默认文件
logging.path=/spring/log
# 在控制台输出的日志的格式
logging.pattern.console=%d{yyyy-MM-dd} [%thread] %-5level %logger{50} - %msg%n
# 指定文件中日志输出的格式
logging.pattern.file=%d{yyyy-MM-dd} === [%thread] === %-5level === %logger{50} ==== %msg%n
5、指定配置
给类路径下放上每个日志框架自己的配置文件即可；SpringBoot 就不使用他默认配置的了
| Logging System | Customization |
|---|---|
| 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.xml：直接就被日志框架识别了logback-spring.xml：日志框架就不直接加载日志的配置项，由 SpringBoot 解析日志配置，可以使用 SpringBoot 的高级 Profile 功能
故，想要使用高级特性，配置文件名称应该为 logback-spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<!--
scan：当此属性设置为true时，配置文件如果发生改变，将会被重新加载，默认值为true。
scanPeriod：设置监测配置文件是否有修改的时间间隔，如果没有给出时间单位，默认单位是毫秒当scan为true时，此属性生效。默认的时间间隔为1分钟。
debug：当此属性设置为true时，将打印出logback内部日志信息，实时查看logback运行状态。默认值为false。
-->
<configuration scan="false" scanPeriod="60 seconds" debug="false">
<!-- 定义日志的根目录 -->
<property name="LOG_HOME" value="/app/log" />
<!-- 定义日志文件名称 -->
<property name="appName" value="ys-springboot"></property>
<!-- ch.qos.logback.core.ConsoleAppender 表示控制台输出 -->
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
<!--
日志输出格式：
%d表示日期时间，
%thread表示线程名，
%-5level：级别从左显示5个字符宽度
%logger{50} 表示logger名字最长50个字符，否则按照句点分割。
%msg：日志消息，
%n是换行符
-->
<layout class="ch.qos.logback.classic.PatternLayout">
<springProfile name="dev">
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} ----> [%thread] ---> %-5level %logger{50} - %msg%n</pattern>
</springProfile>
<springProfile name="!dev">
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} ==== [%thread] ==== %-5level %logger{50} - %msg%n</pattern>
</springProfile>
</layout>
</appender>
<!-- 滚动记录文件，先将日志记录到指定文件，当符合某个条件时，将日志记录到其他文件 -->
<appender name="appLogAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
<!-- 指定日志文件的名称 -->
<file>${LOG_HOME}/${appName}.log</file>
<!--
当发生滚动时，决定 RollingFileAppender 的行为，涉及文件移动和重命名
TimeBasedRollingPolicy： 最常用的滚动策略，它根据时间来制定滚动策略，既负责滚动也负责出发滚动。
-->
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!--
滚动时产生的文件的存放位置及文件名称 %d{yyyy-MM-dd}：按天进行日志滚动
%i：当文件大小超过maxFileSize时，按照i进行文件滚动
-->
<fileNamePattern>${LOG_HOME}/${appName}-%d{yyyy-MM-dd}-%i.log</fileNamePattern>
<!--
可选节点，控制保留的归档文件的最大数量，超出数量就删除旧文件。假设设置每天滚动，
且maxHistory是365，则只保存最近365天的文件，删除之前的旧文件。注意，删除旧文件是，
那些为了归档而创建的目录也会被删除。
-->
<MaxHistory>365</MaxHistory>
<!--
当日志文件超过maxFileSize指定的大小是，根据上面提到的%i进行日志文件滚动 注意此处配置SizeBasedTriggeringPolicy是无法实现按文件大小进行滚动的，必须配置timeBasedFileNamingAndTriggeringPolicy
-->
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>100MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<!-- 日志输出格式： -->
<layout class="ch.qos.logback.classic.PatternLayout">
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [ %thread ] - [ %-5level ] [ %logger{50} : %line ] - %msg%n</pattern>
</layout>
</appender>
<!--
logger主要用于存放日志对象，也可以定义日志类型、级别
name：表示匹配的logger类型前缀，也就是包的前半部分
level：要记录的日志级别，包括 TRACE < DEBUG < INFO < WARN < ERROR
additivity：作用在于children-logger是否使用 rootLogger配置的appender进行输出，
false：表示只用当前logger的appender-ref，true：
表示当前logger的appender-ref和rootLogger的appender-ref都有效
-->
<!-- hibernate logger -->
<logger name="com.atguigu" level="debug" />
<!-- Spring framework logger -->
<logger name="org.springframework" level="debug" additivity="false"></logger>
<!--
root与logger是父子关系，没有特别定义则默认为root，任何一个类只会和一个logger对应，
要么是定义的logger，要么是root，判断的关键在于找到这个logger，然后判断这个logger的appender和level。
-->
<root level="info">
<appender-ref ref="stdout" />
<appender-ref ref="appLogAppender" />
</root>
</configuration>
里面配置了
启动测试类
如果使用 logback.xml 作为日志配置文件，还要使用 profile 功能，会有以下错误
no applicable action for [springProfile]
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