三个小Demo理解三个功能:
案例中的pom.xml文件
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.4</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.hu</groupId> <artifactId>springboot-09</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot-09</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--Java--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
第一部分 异步
@Service public class AsyncService { public void hellow(){ try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("数据正在处理"); }
控制层的信息
@RestController public class AsyncController { AsyncService asyncService =new AsyncService(); @RequestMapping("/hello") public String hello() { //停止三秒 asyncService.hellow(); return "ok"; }
@Async告诉Spring是异步方法
第二部分 邮件
简单的邮件信息
package com.hu.springboot09; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.mail.javamail.JavaMailSenderImpl; import org.springframework.mail.javamail.MimeMessageHelper; import javax.mail.MessagingException; import javax.mail.internet.MimeMessage; import java.io.File; @SpringBootTest public class Springboot09ApplicationTests { @Autowired JavaMailSenderImpl mailSender; @Test void contextLoads() { //一个简单的邮件 JavaMailSenderImpl mailSender = new JavaMailSenderImpl(); mailSender.setSubject("小矿山"); mailSender.setTest("谢谢你的课程"); //f发送人 mailSender.setTo("2561207338@qq.com"); mailSender.setFrom("2561207338@qq.co"); }
复杂的邮件
MimeMessageHelper messageHelper = new MimeMessageHelper(); //复杂邮件 MimeMessage mimeMessage = mailSender.createMimeMessage(); //组件 try { MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true,"UTF-8"); //正文 helper.setSubject("小矿山"); helper.setText("<p></p>",true); //附件 helper.addAttachment("1.jpg",new File("C:\\Users\\MZFAITHDREAM\\Pictures\\Saved Picture")); helper.addAttachment("2.jpg",new File("C:\\Users\\MZFAITHDREAM\\Pictures\\Saved Picture")); //f发送人 helper.setTo("2561207338@qq.com"); helper.setFrom("2561207338@qq.co"); mailSender.send(mimeMessage); } catch (MessagingException e) { e.printStackTrace(); }
复杂的邮件方法
/** * * @param html * @param subject * @param text * @throws MessagingException * @Author */ public void SendMail(Boolean html,String subject,String text) throws MessagingException{ //复杂邮件 MimeMessage mimeMessage = mailSender.createMimeMessage(); MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true,"UTF-8"); //正文 helper.setSubject(subject); helper.setText(text,true); //附件 helper.addAttachment("1.jpg",new File("C:\\Users\\MZFAITHDREAM\\Pictures\\Saved Picture")); helper.addAttachment("2.jpg",new File("C:\\Users\\MZFAITHDREAM\\Pictures\\Saved Picture")); //f发送人 helper.setTo("2561207338@qq.com"); helper.setFrom("2561207338@qq.co"); mailSender.send(mimeMessage); } }
第三部分 定时
{秒数} {分钟} {小时} {日期} {月份} {星期} {年份(可为空)}
cron表达式各占位符解释:
{秒数}{分钟} ==> 允许值范围: 0~59 ,不允许为空值,若值不合法,调度器将抛出SchedulerException异常
“*” 代表每隔1秒钟触发;
“,” 代表在指定的秒数触发,比如”0,15,45”代表0秒、15秒和45秒时触发任务
“-“代表在指定的范围内触发,比如”25-45”代表从25秒开始触发到45秒结束触发,每隔1秒触发1次
“/”代表触发步进(step),”/”前面的值代表初始值(““等同”0”),后面的值代表偏移量,比如”0/20”或者”/20”代表从0秒钟开始,每隔20秒钟触发1次,即0秒触发1次,20秒触发1次,40秒触发1次;”5/20”代表5秒触发1次,25秒触发1次,45秒触发1次;”10-45/20”代表在[10,45]内步进20秒命中的时间点触发,即10秒触发1次,30秒触发1次
{小时} ==> 允许值范围: 0~23 ,不允许为空值,若值不合法,调度器将抛出SchedulerException异常,占位符和秒数一样
{日期} ==> 允许值范围: 1~31 ,不允许为空值,若值不合法,调度器将抛出SchedulerException异常
{星期} ==> 允许值范围: 1~7 (SUN-SAT),1代表星期天(一星期的第一天),以此类推,7代表星期六(一星期的最后一天),不允许为空值,若值不合法,调度器将抛出SchedulerException异常
{年份} ==> 允许值范围: 1970~2099 ,允许为空,若值不合法,调度器将抛出SchedulerException异常
注意:除了{日期}和{星期}可以使用”?”来实现互斥,表达无意义的信息之外,其他占位符都要具有具体的时间含义,且依赖关系为:年->月->日期(星期)->小时->分钟->秒数
cron表达式经典案例:
“30 * * * * ?” 每半分钟触发任务
“30 10 * * * ?” 每小时的10分30秒触发任务
“30 10 1 * * ?” 每天1点10分30秒触发任务
“30 10 1 20 * ?” 每月20号1点10分30秒触发任务
“30 10 1 20 10 ? *” 每年10月20号1点10分30秒触发任务
“30 10 1 20 10 ? 2011” 2011年10月20号1点10分30秒触发任务
“30 10 1 ? 10 * 2011” 2011年10月每天1点10分30秒触发任务
“30 10 1 ? 10 SUN 2011” 2011年10月每周日1点10分30秒触发任务
“15,30,45 * * * * ?” 每15秒,30秒,45秒时触发任务
“15-45 * * * * ?” 15到45秒内,每秒都触发任务
“15/5 * * * * ?” 每分钟的每15秒开始触发,每隔5秒触发一次
“15-30/5 * * * * ?” 每分钟的15秒到30秒之间开始触发,每隔5秒触发一次
“0 0/3 * * * ?” 每小时的第0分0秒开始,每三分钟触发一次
“0 15 10 ? * MON-FRI” 星期一到星期五的10点15分0秒触发任务
“0 15 10 L * ?” 每个月最后一天的10点15分0秒触发任务
“0 15 10 LW * ?” 每个月最后一个工作日的10点15分0秒触发任务
“0 15 10 ? * 5L” 每个月最后一个星期四的10点15分0秒触发任务
“0 15 10 ? * 5#3” 每个月第三周的星期四的10点15分0秒触发任务
package com.hu.springboot09.Controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import service.AsyncService; import service.ScheduledService; @RestController public class AsyncController { AsyncService asyncService =new AsyncService(); ScheduledService scheduledService = new ScheduledService(); @RequestMapping("/hello") public String hello() { //停止三秒 asyncService.hellow(); scheduledService.hello1(); return "ok"; } }
启动程序
package com.hu.springboot09; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.scheduling.annotation.EnableAsync; import org.springframework.scheduling.annotation.EnableScheduling; //开启功能 @EnableAsync @EnableScheduling//开启定时注解 @SpringBootApplication public class Springboot09Application { public static void main(String[] args) { SpringApplication.run(Springboot09Application.class, args); } }
"C:\Program Files\Java\jdk1.8.0_171\bin\java.exe" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:D:\IDEA\com.text\IntelliJ IDEA 2020.1.2\lib\idea_rt.jar=56121:D:\IDEA\com.text\IntelliJ IDEA 2020.1.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_171\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_171\jre\lib\rt.jar;D:\maven-workspace\spaceVideospringboot\springboot-09\target\classes;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.7.4\spring-boot-starter-web-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot-starter\2.7.4\spring-boot-starter-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot\2.7.4\spring-boot-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.7.4\spring-boot-autoconfigure-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.7.4\spring-boot-starter-logging-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\ch\qos\logback\logback-classic\1.2.11\logback-classic-1.2.11.jar;C:\Users\MZFAITHDREAM\.m2\repository\ch\qos\logback\logback-core\1.2.11\logback-core-1.2.11.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\slf4j\slf4j-api\1.7.36\slf4j-api-1.7.36.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.17.2\log4j-to-slf4j-2.17.2.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\apache\logging\log4j\log4j-api\2.17.2\log4j-api-2.17.2.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\slf4j\jul-to-slf4j\1.7.36\jul-to-slf4j-1.7.36.jar;C:\Users\MZFAITHDREAM\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-core\5.3.23\spring-core-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-jcl\5.3.23\spring-jcl-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\yaml\snakeyaml\1.30\snakeyaml-1.30.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.7.4\spring-boot-starter-json-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.13.4\jackson-databind-2.13.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.13.4\jackson-annotations-2.13.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.13.4\jackson-core-2.13.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.13.4\jackson-datatype-jdk8-2.13.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.13.4\jackson-datatype-jsr310-2.13.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.13.4\jackson-module-parameter-names-2.13.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\2.7.4\spring-boot-starter-tomcat-2.7.4.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.65\tomcat-embed-core-9.0.65.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.65\tomcat-embed-el-9.0.65.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.65\tomcat-embed-websocket-9.0.65.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-web\5.3.23\spring-web-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-beans\5.3.23\spring-beans-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-webmvc\5.3.23\spring-webmvc-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-context\5.3.23\spring-context-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-expression\5.3.23\spring-expression-5.3.23.jar;C:\Users\MZFAITHDREAM\.m2\repository\org\springframework\spring-aop\5.3.23\spring-aop-5.3.23.jar" com.hu.springboot09.Springboot09Application . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.7.4) 2022-10-05 20:32:51.731 INFO 26304 --- [ main] c.h.s.Springboot09Application : Starting Springboot09Application using Java 1.8.0_171 on HELLOWWORLD with PID 26304 (D:\maven-workspace\spaceVideospringboot\springboot-09\target\classes started by MZFAITHDREAM in D:\maven-workspace\spaceVideospringboot\springboot-09) 2022-10-05 20:32:51.736 INFO 26304 --- [ main] c.h.s.Springboot09Application : No active profile set, falling back to 1 default profile: "default" 2022-10-05 20:32:53.313 INFO 26304 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2022-10-05 20:32:53.324 INFO 26304 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2022-10-05 20:32:53.325 INFO 26304 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.65] 2022-10-05 20:32:53.571 INFO 26304 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2022-10-05 20:32:53.571 INFO 26304 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1768 ms 2022-10-05 20:32:53.922 INFO 26304 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2022-10-05 20:32:53.940 INFO 26304 --- [ main] c.h.s.Springboot09Application : Started Springboot09Application in 2.843 seconds (JVM running for 4.093) 2022-10-05 20:33:17.233 INFO 26304 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet' 2022-10-05 20:33:17.233 INFO 26304 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet' 2022-10-05 20:33:17.234 INFO 26304 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms 数据正在处理 hello 什么方法被执行了