我正在阅读Spring调度程序指南（https://spring.io/guides/gs/scheduling-tasks/），但我的spring-boot应用程序在启动后立即终止。我检查了所有依赖，他们似乎没事。我的输出是
"C:\Program Files\Java\jdk1.8.0_111\bin\java" -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:60501,suspend=y,server=n -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_111\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\rt.jar;C:\my-data\code\spring-guides\spring-schedular\target\classes;C:\Users\ashis\.m2\repository\org\springframework\boot\spring-boot-starter\1.5.9.RELEASE\spring-boot-starter-1.5.9.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\boot\spring-boot\1.5.9.RELEASE\spring-boot-1.5.9.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\spring-context\4.3.13.RELEASE\spring-context-4.3.13.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\spring-aop\4.3.13.RELEASE\spring-aop-4.3.13.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\spring-beans\4.3.13.RELEASE\spring-beans-4.3.13.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\spring-expression\4.3.13.RELEASE\spring-expression-4.3.13.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\1.5.9.RELEASE\spring-boot-autoconfigure-1.5.9.RELEASE.jar;C:\Users\ashis\.m2\repository\org\springframework\boot\spring-boot-starter-logging\1.5.9.RELEASE\spring-boot-starter-logging-1.5.9.RELEASE.jar;C:\Users\ashis\.m2\repository\ch\qos\logback\logback-classic\1.1.11\logback-classic-1.1.11.jar;C:\Users\ashis\.m2\repository\ch\qos\logback\logback-core\1.1.11\logback-core-1.1.11.jar;C:\Users\ashis\.m2\repository\org\slf4j\jcl-over-slf4j\1.7.25\jcl-over-slf4j-1.7.25.jar;C:\Users\ashis\.m2\repository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;C:\Users\ashis\.m2\repository\org\slf4j\log4j-over-slf4j\1.7.25\log4j-over-slf4j-1.7.25.jar;C:\Users\ashis\.m2\repository\org\springframework\spring-core\4.3.13.RELEASE\spring-core-4.3.13.RELEASE.jar;C:\Users\ashis\.m2\repository\org\yaml\snakeyaml\1.17\snakeyaml-1.17.jar;C:\Users\ashis\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\ashis\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\172.3544.35\lib\idea_rt.jar" com.ashish.springschedular.SpringSchedularApplication
Connected to the target VM, address: '127.0.0.1:60501', transport: 'socket'
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
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:: Spring Boot :: (v1.5.9.RELEASE)
2017-12-18 06:24:30.882 INFO 11836 --- [ main] c.a.s.SpringSchedularApplication : Starting SpringSchedularApplication on DESKTOP-SP4170I with PID 11836 (C:\my-data\code\spring-guides\spring-schedular\target\classes started by ashish in C:\my-data\code\spring-guides\spring-schedular)
2017-12-18 06:24:30.882 INFO 11836 --- [ main] c.a.s.SpringSchedularApplication : No active profile set, falling back to default profiles: default
2017-12-18 06:24:31.053 INFO 11836 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@1d8bd0de: startup date [Mon Dec 18 06:24:31 EST 2017]; root of context hierarchy
2017-12-18 06:24:33.115 INFO 11836 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
Disconnected from the target VM, address: '127.0.0.1:60501', transport: 'socket'
2017-12-18 06:24:33.161 INFO 11836 --- [ main] c.a.s.SpringSchedularApplication : Started SpringSchedularApplication in 2.997 seconds (JVM running for 4.005)
2017-12-18 06:24:33.161 INFO 11836 --- [ Thread-2] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@1d8bd0de: startup date [Mon Dec 18 06:24:31 EST 2017]; root of context hierarchy
2017-12-18 06:24:33.161 INFO 11836 --- [ Thread-2] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
Process finished with exit code 0
我的主要应用代码：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringSchedularApplication {
public static void main(String[] args) {
SpringApplication.run(SpringSchedularApplication.class, args);
}
}
我的Pom：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ashish</groupId>
<artifactId>spring-schedular</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-schedular</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
我的任何调度程序文件：
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import java.text.DateFormat;
import java.util.Date;
import static java.text.DateFormat.LONG;
import static java.text.DateFormat.getDateInstance;
import static java.util.Locale.US;
@Component
public class ScheduledTask {
private static final Logger log = LoggerFactory.getLogger(ScheduledTask.class);
private static final DateFormat dateFormat = getDateInstance(LONG, US);
@Scheduled(fixedRate = 5000)
public void readCurrentTime(){
log.info("The time is now[]", dateFormat.format(new Date()));
}
}
答案 0 :(得分：1)
虽然Spring Boot根据您的依赖性启用了许多功能，但它不会对调度和异步执行此操作。您仍然需要分别添加@EnableScheduling和@EnableAsync来手动启用它。
在您的情况下，将@EnableScheduling添加到您的应用程序类就足够了。
@SpringBootApplication
@EnableScheduling
public class SpringSchedularApplication {
public static void main(String[] args) {
SpringApplication.run(SpringSchedularApplication.class, args);
}
}
启用此调度将启用，并且因为有一个调度线程仍在运行，应用程序不会关闭。