0 课程地址
https://www.imooc.com/video/16792/0
1 课程重点
1.1 cron表达式在线生成地址（非年）
1.2 重点
cron表达式 注解相关@Scheduled(cron =)
2 课程demo
2.1 课程demo
顶类：（同上节）
定时任务类：
package com.example.demo.task; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; import java.text.SimpleDateFormat; import java.util.Date; /** * TestTask * * @author 魏豆豆 * @date 2020/12/27 */ //标注Spring管理的Bean，使用@Component注解在一个类上，表示将此类标记为Spring容器中的一个Bean。 @Component public class TestTask { private static final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm:ss"); //定义每3秒执行任务 //@Scheduled(fixedRate = 3000) @Scheduled(cron = "10-40 * * * * ? ") public void printCurrentTime(){ System.out.println("当前时间为："+simpleDateFormat.format(new Date())); } }
打印日志：
D:javajdkjdk8jdkinjava.exe -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:8543,suspend=y,server=n -javaagent:C:Usersweijingli.IdeaIC2018.1systemcaptureAgentdebugger-agent.jar=file:/C:/Users/weijingli/AppData/Local/Temp/capture.props -Dfile.encoding=UTF-8 -classpath "D:javajdkjdk8jdkjrelibcharsets.jar;D:javajdkjdk8jdkjrelibdeploy.jar;D:javajdkjdk8jdkjrelibextaccess-bridge-64.jar;D:javajdkjdk8jdkjrelibextcldrdata.jar;D:javajdkjdk8jdkjrelibextdnsns.jar;D:javajdkjdk8jdkjrelibextjaccess.jar;D:javajdkjdk8jdkjrelibextjfxrt.jar;D:javajdkjdk8jdkjrelibextlocaledata.jar;D:javajdkjdk8jdkjrelibext ashorn.jar;D:javajdkjdk8jdkjrelibextsunec.jar;D:javajdkjdk8jdkjrelibextsunjce_provider.jar;D:javajdkjdk8jdkjrelibextsunmscapi.jar;D:javajdkjdk8jdkjrelibextsunpkcs11.jar;D:javajdkjdk8jdkjrelibextzipfs.jar;D:javajdkjdk8jdkjrelibjavaws.jar;D:javajdkjdk8jdkjrelibjce.jar;D:javajdkjdk8jdkjrelibjfr.jar;D:javajdkjdk8jdkjrelibjfxswt.jar;D:javajdkjdk8jdkjrelibjsse.jar;D:javajdkjdk8jdkjrelibmanagement-agent.jar;D:javajdkjdk8jdkjrelibplugin.jar;D:javajdkjdk8jdkjrelib esources.jar;D:javajdkjdk8jdkjrelib t.jar;F:xiangmu3XinFuQiangSpringboot_1download_resourceSpringbootDemodemodemo argetclasses;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-web2.4.0spring-boot-starter-web-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter2.4.0spring-boot-starter-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-logging2.4.0spring-boot-starter-logging-2.4.0.jar;C:Usersweijingli.m2 epositorychqoslogbacklogback-classic1.2.3logback-classic-1.2.3.jar;C:Usersweijingli.m2 epositorychqoslogbacklogback-core1.2.3logback-core-1.2.3.jar;C:Usersweijingli.m2 epositoryorgapachelogginglog4jlog4j-to-slf4j2.13.3log4j-to-slf4j-2.13.3.jar;C:Usersweijingli.m2 epositoryorgapachelogginglog4jlog4j-api2.13.3log4j-api-2.13.3.jar;C:Usersweijingli.m2 epositoryorgslf4jjul-to-slf4j1.7.30jul-to-slf4j-1.7.30.jar;C:Usersweijingli.m2 epositoryjakartaannotationjakarta.annotation-api1.3.5jakarta.annotation-api-1.3.5.jar;C:Usersweijingli.m2 epositoryorgyamlsnakeyaml1.27snakeyaml-1.27.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-json2.4.0spring-boot-starter-json-2.4.0.jar;C:Usersweijingli.m2 epositorycomfasterxmljacksoncorejackson-databind2.11.3jackson-databind-2.11.3.jar;C:Usersweijingli.m2 epositorycomfasterxmljacksoncorejackson-annotations2.11.3jackson-annotations-2.11.3.jar;C:Usersweijingli.m2 epositorycomfasterxmljacksoncorejackson-core2.11.3jackson-core-2.11.3.jar;C:Usersweijingli.m2 epositorycomfasterxmljacksondatatypejackson-datatype-jdk82.11.3jackson-datatype-jdk8-2.11.3.jar;C:Usersweijingli.m2 epositorycomfasterxmljacksondatatypejackson-datatype-jsr3102.11.3jackson-datatype-jsr310-2.11.3.jar;C:Usersweijingli.m2 epositorycomfasterxmljacksonmodulejackson-module-parameter-names2.11.3jackson-module-parameter-names-2.11.3.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-tomcat2.4.0spring-boot-starter-tomcat-2.4.0.jar;C:Usersweijingli.m2 epositoryorgapache omcatembed omcat-embed-core9.0.39 omcat-embed-core-9.0.39.jar;C:Usersweijingli.m2 epositoryorgglassfishjakarta.el3.0.3jakarta.el-3.0.3.jar;C:Usersweijingli.m2 epositoryorgapache omcatembed omcat-embed-websocket9.0.39 omcat-embed-websocket-9.0.39.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-web5.3.1spring-web-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-beans5.3.1spring-beans-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-webmvc5.3.1spring-webmvc-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-aop5.3.1spring-aop-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-context5.3.1spring-context-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-expression5.3.1spring-expression-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-core5.3.1spring-core-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-jcl5.3.1spring-jcl-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-devtools2.4.0spring-boot-devtools-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot2.4.0spring-boot-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-autoconfigure2.4.0spring-boot-autoconfigure-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-configuration-processor2.4.0spring-boot-configuration-processor-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-freemarker2.4.0spring-boot-starter-freemarker-2.4.0.jar;C:Usersweijingli.m2 epositoryorgfreemarkerfreemarker2.3.30freemarker-2.3.30.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-context-support5.3.1spring-context-support-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-thymeleaf2.4.0spring-boot-starter-thymeleaf-2.4.0.jar;C:Usersweijingli.m2 epositoryorg hymeleaf hymeleaf-spring53.0.11.RELEASE hymeleaf-spring5-3.0.11.RELEASE.jar;C:Usersweijingli.m2 epositoryorg hymeleaf hymeleaf3.0.11.RELEASE hymeleaf-3.0.11.RELEASE.jar;C:Usersweijingli.m2 epositoryorgattoparserattoparser2.0.5.RELEASEattoparser-2.0.5.RELEASE.jar;C:Usersweijingli.m2 epositoryorgunbescapeunbescape1.1.6.RELEASEunbescape-1.1.6.RELEASE.jar;C:Usersweijingli.m2 epositoryorg hymeleafextras hymeleaf-extras-java8time3.0.4.RELEASE hymeleaf-extras-java8time-3.0.4.RELEASE.jar;C:Usersweijingli.m2 epositorycomalibabadruid1.1.0druid-1.1.0.jar;D:javajdkjdk8jdklibjconsole.jar;D:javajdkjdk8jdklib ools.jar;C:Usersweijingli.m2 epositorymysqlmysql-connector-java5.1.41mysql-connector-java-5.1.41.jar;C:Usersweijingli.m2 epositoryorgmybatisspringootmybatis-spring-boot-starter1.3.1mybatis-spring-boot-starter-1.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-jdbc2.4.0spring-boot-starter-jdbc-2.4.0.jar;C:Usersweijingli.m2 epositorycomzaxxerHikariCP3.4.5HikariCP-3.4.5.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-jdbc5.3.1spring-jdbc-5.3.1.jar;C:Usersweijingli.m2 epositoryorgmybatisspringootmybatis-spring-boot-autoconfigure1.3.1mybatis-spring-boot-autoconfigure-1.3.1.jar;C:Usersweijingli.m2 epositoryorgmybatismybatis3.4.5mybatis-3.4.5.jar;C:Usersweijingli.m2 epositoryorgmybatismybatis-spring1.3.1mybatis-spring-1.3.1.jar;C:Usersweijingli.m2 epository kmybatismapper-spring-boot-starter1.2.4mapper-spring-boot-starter-1.2.4.jar;C:Usersweijingli.m2 epository kmybatismapper-spring-boot-autoconfigure1.2.4mapper-spring-boot-autoconfigure-1.2.4.jar;C:Usersweijingli.m2 epository kmybatismapper3.5.3mapper-3.5.3.jar;C:Usersweijingli.m2 epositoryjavaxpersistencepersistence-api1.0persistence-api-1.0.jar;C:Usersweijingli.m2 epositorycomgithubpagehelperpagehelper-spring-boot-starter1.2.3pagehelper-spring-boot-starter-1.2.3.jar;C:Usersweijingli.m2 epositorycomgithubpagehelperpagehelper-spring-boot-autoconfigure1.2.3pagehelper-spring-boot-autoconfigure-1.2.3.jar;C:Usersweijingli.m2 epositorycomgithubpagehelperpagehelper5.1.2pagehelper-5.1.2.jar;C:Usersweijingli.m2 epositorycomgithubjsqlparserjsqlparser1.0jsqlparser-1.0.jar;C:Usersweijingli.m2 epositorycomalibabadruid-spring-boot-starter1.1.9druid-spring-boot-starter-1.1.9.jar;C:Usersweijingli.m2 epositoryorgslf4jslf4j-api1.7.30slf4j-api-1.7.30.jar;C:Usersweijingli.m2 epositoryorgmybatisgeneratormybatis-generator-core1.3.2mybatis-generator-core-1.3.2.jar;C:Usersweijingli.m2 epositoryorgspringframeworkootspring-boot-starter-data-redis2.4.0spring-boot-starter-data-redis-2.4.0.jar;C:Usersweijingli.m2 epositoryorgspringframeworkdataspring-data-redis2.4.1spring-data-redis-2.4.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkdataspring-data-keyvalue2.4.1spring-data-keyvalue-2.4.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkdataspring-data-commons2.4.1spring-data-commons-2.4.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-tx5.3.1spring-tx-5.3.1.jar;C:Usersweijingli.m2 epositoryorgspringframeworkspring-oxm5.3.1spring-oxm-5.3.1.jar;C:Usersweijingli.m2 epositoryiolettucelettuce-core6.0.1.RELEASElettuce-core-6.0.1.RELEASE.jar;C:Usersweijingli.m2 epositoryio etty etty-common4.1.54.Final etty-common-4.1.54.Final.jar;C:Usersweijingli.m2 epositoryio etty etty-handler4.1.54.Final etty-handler-4.1.54.Final.jar;C:Usersweijingli.m2 epositoryio etty etty-resolver4.1.54.Final etty-resolver-4.1.54.Final.jar;C:Usersweijingli.m2 epositoryio etty etty-buffer4.1.54.Final etty-buffer-4.1.54.Final.jar;C:Usersweijingli.m2 epositoryio etty etty-codec4.1.54.Final etty-codec-4.1.54.Final.jar;C:Usersweijingli.m2 epositoryio etty etty-transport4.1.54.Final etty-transport-4.1.54.Final.jar;C:Usersweijingli.m2 epositoryioprojectreactor eactor-core3.4.0 eactor-core-3.4.0.jar;C:Usersweijingli.m2 epositoryorg eactivestreams eactive-streams1.0.3 eactive-streams-1.0.3.jar;D:javadevolopKitideaanZhIntelliJ IDEA Community Edition 2018.1.4libidea_rt.jar" com.example.demo.DemoApplication Connected to the target VM, address: '127.0.0.1:8543', transport: 'socket' {spring.web.resources.chain.cache=false, spring.web.resources.cache.period=0} . ____ _ __ _ _ /\ / ___'_ __ _ _(_)_ __ __ _ ( ( )\___ | '_ | '_| | '_ / _` | \/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.4.0) 2020-12-27 08:17:56.888 INFO 17128 --- [ restartedMain] com.example.demo.DemoApplication : Starting DemoApplication using Java 1.8.0_77 on DESKTOP-A08HONB with PID 17128 (F:xiangmu3XinFuQiangSpringboot_1download_resourceSpringbootDemodemodemo argetclasses started by weijingli in F:xiangmu3XinFuQiangSpringboot_1download_resourceSpringbootDemodemodemo) 2020-12-27 08:17:56.898 INFO 17128 --- [ restartedMain] com.example.demo.DemoApplication : No active profile set, falling back to default profiles: default 2020-12-27 08:17:57.320 INFO 17128 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable 2020-12-27 08:17:57.320 INFO 17128 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG' 2020-12-27 08:18:01.211 INFO 17128 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode! 2020-12-27 08:18:01.237 INFO 17128 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode. 2020-12-27 08:18:01.506 INFO 17128 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 152 ms. Found 0 Redis repository interfaces. 2020-12-27 08:18:04.004 ERROR 17128 --- [ restartedMain] o.a.catalina.core.AprLifecycleListener : An incompatible version [1.1.32] of the Apache Tomcat Native library is installed, while Tomcat requires version [1.2.14] 2020-12-27 08:18:07.448 INFO 17128 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8088 (http) 2020-12-27 08:18:07.514 INFO 17128 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2020-12-27 08:18:07.514 INFO 17128 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.39] 2020-12-27 08:18:07.969 INFO 17128 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/IMooc] : Initializing Spring embedded WebApplicationContext 2020-12-27 08:18:07.969 INFO 17128 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 10644 ms 2020-12-27 08:18:08.873 INFO 17128 --- [ restartedMain] c.a.d.s.b.a.DruidDataSourceAutoConfigure : Init DruidDataSource 2020-12-27 08:18:11.104 INFO 17128 --- [ restartedMain] com.alibaba.druid.pool.DruidDataSource : {dataSource-1} inited 2020-12-27 08:18:17.017 INFO 17128 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor' 2020-12-27 08:18:18.256 WARN 17128 --- [ restartedMain] org.thymeleaf.templatemode.TemplateMode : [THYMELEAF][restartedMain] Template Mode 'HTML5' is deprecated. Using Template Mode 'HTML' instead. 2020-12-27 08:18:19.961 INFO 17128 --- [ restartedMain] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'taskScheduler' 2020-12-27 08:18:20.214 INFO 17128 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729 2020-12-27 08:18:20.390 INFO 17128 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8088 (http) with context path '/IMooc' 2020-12-27 08:18:20.522 INFO 17128 --- [ restartedMain] com.example.demo.DemoApplication : Started DemoApplication in 26.702 seconds (JVM running for 30.672) 当前时间为：08:18:21 当前时间为：08:18:22 当前时间为：08:18:23 当前时间为：08:18:24 当前时间为：08:18:25 当前时间为：08:18:26 当前时间为：08:18:27 当前时间为：08:18:28 当前时间为：08:18:29 当前时间为：08:18:30 当前时间为：08:18:31 当前时间为：08:18:32 当前时间为：08:18:33 当前时间为：08:18:34 当前时间为：08:18:35 当前时间为：08:18:36 当前时间为：08:18:37 当前时间为：08:18:38 当前时间为：08:18:39 当前时间为：08:18:40 当前时间为：08:19:10 当前时间为：08:19:11 当前时间为：08:19:12 当前时间为：08:19:13 当前时间为：08:19:14