如何在spring boot中不使用@Scheduled()注释来调度cron作业

在Spring Boot中，可以使用Quartz框架来实现不使用@Scheduled()注解来调度cron作业。

Quartz是一个功能强大且灵活的作业调度框架，它可以与Spring Boot无缝集成。下面是在Spring Boot中实现不使用@Scheduled()注解来调度cron作业的步骤：

添加依赖：在项目的pom.xml文件中添加Quartz的依赖。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-quartz</artifactId>
</dependency>

创建Job类：创建一个实现了Quartz的Job接口的类，该类将包含要执行的作业逻辑。

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class MyJob implements Job {
    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        // 在这里编写要执行的作业逻辑
    }
}

创建JobDetail和Trigger：在Spring Boot的配置类中创建JobDetail和Trigger，并将它们与Job类关联起来。

import org.quartz.JobDetail;
import org.quartz.Trigger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.quartz.JobDetailFactoryBean;
import org.springframework.scheduling.quartz.SimpleTriggerFactoryBean;

@Configuration
public class QuartzConfig {
    @Bean
    public JobDetailFactoryBean jobDetail() {
        JobDetailFactoryBean factory = new JobDetailFactoryBean();
        factory.setJobClass(MyJob.class);
        factory.setDurability(true);
        return factory;
    }

    @Bean
    public SimpleTriggerFactoryBean trigger(JobDetail jobDetail) {
        SimpleTriggerFactoryBean factory = new SimpleTriggerFactoryBean();
        factory.setJobDetail(jobDetail);
        factory.setStartDelay(0);
        factory.setRepeatInterval(5000); // 每隔5秒执行一次作业
        return factory;
    }
}

启用Quartz调度器：在Spring Boot的配置类中启用Quartz调度器。

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@EnableScheduling
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}