Springboot2 定时任务Quartz

淩亂°似流年 2021-12-02 00:10 357阅读 0赞

定时任务是经常性的开发需求，也可以作为运维工具，周期性的处理某些运维工作。

一、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/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.demo</groupId>
      <artifactId>cron</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.0.2.RELEASE</version>
    		<relativePath/> 
    	</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-quartz</artifactId>
    		</dependency>
    	</dependencies>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    </project>

二、SpringBoot主类

import org.quartz.CronScheduleBuilder;
    import org.quartz.JobBuilder;
    import org.quartz.JobDetail;
    import org.quartz.Trigger;
    import org.quartz.TriggerBuilder;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.Bean;
    
    @SpringBootApplication
    public class CronApplication {
    
    	@Value("${cron.expr}")
    	private String cron;
    
    	@Value("${cron.command}")
    	private String command;
    
    	public static void main(String[] args) {
    		SpringApplication.run(CronApplication.class, args);
    	}
    
    	@Bean
    	public JobDetail sampleJobDetail() {
    		return JobBuilder.newJob(SampleJob.class).withIdentity("sampleJob")
    				.usingJobData("command", command).storeDurably().build();
    	}
    
    	@Bean
    	public Trigger sampleJobTrigger() {
    		CronScheduleBuilder builder = CronScheduleBuilder.cronSchedule(cron);
    		return TriggerBuilder.newTrigger().forJob(sampleJobDetail())
    				.withIdentity("sampleTrigger").withSchedule(builder).build();
    	}
    
    }

三、QuartzJob 类

import java.io.BufferedReader;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    
    import org.quartz.JobExecutionContext;
    import org.quartz.JobExecutionException;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.scheduling.quartz.QuartzJobBean;
    
    public class SampleJob extends QuartzJobBean {
    	Logger log = LoggerFactory.getLogger(SampleJob.class);
    
    	private String command;
    
    	// Invoked if a Job data map entry with that name
    	public void setCommand(String command) {
    		this.command = command;
    	}
    
    	@Override
    	protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
    		log.info(String.format("begin: %s!", this.command));
    		try {
    			Process p = Runtime.getRuntime().exec(command);
    			InputStream is = p.getInputStream();
    			BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    			p.waitFor();
    			if (p.exitValue() != 0) {
    				log.info("execute error.");
    			}
    
    			String s = null;
    			while ((s = reader.readLine()) != null) {
    				log.info(s);
    			}
    		} catch (Exception e) {
    			log.error(e.getMessage(), e);
    		}
    		log.info("execute end.");
    	}
    }

四、application.properties

cron.expr=0/20 \* \* \* \* ?  
cron.command=d:/tmp/db\_backup.bat

logging.file=d:/tmp/cron.log  
logging.level.root=WARN  
logging.level.com.yinww.cron=INFO  
logging.file.max-size=10MB  
logging.file.max-history=20

整体代码都比较简单，不做过多解释。

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