Springboot项目中定时任务的四种实现方式

在Spring Boot项目中，实现定时任务的四种常见方式如下：

1. 使用@Scheduled注解：

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
 
@Component
public class ScheduledTask {
 
    @Scheduled(fixedRate = 5000)
    public void executeTask() {
        // 定时任务的逻辑
        System.out.println("Fixed rate task");
    }
}

2. 使用ScheduledExecutorService：

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
 
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
 
@Configuration
public class ScheduledTaskConfiguration {
 
    @Bean
    public ScheduledExecutorService scheduledExecutorService() {
        return Executors.newScheduledThreadPool(5);
    }
 
    public void startScheduledTask(ScheduledExecutorService executorService) {
        Runnable task = () -> System.out.println("Scheduled task with ExecutorService");
        executorService.scheduleAtFixedRate(task, 0, 5, TimeUnit.SECONDS);
    }
}

3. 使用TaskScheduler：

import org.springframework.scheduling.TaskScheduler;
import org.springframework.stereotype.Component;
 
@Component
public class TaskSchedulerTask {
 
    private TaskScheduler taskScheduler;
 
    public TaskSchedulerTask(TaskScheduler taskScheduler) {
        this.taskScheduler = taskScheduler;
    }
 
    public void startTask() {
        Runnable task = () -> System.out.println("Scheduled task with TaskScheduler");
        taskScheduler.scheduleAtFixedRate(task, 5000);
    }
}

4. 使用Quartz：

首先添加依赖：

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

然后实现定时任务：

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
 
public class QuartzJob implements Job {
 
    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        System.out.println("Quartz job executed");
    }
}

配置定时任务：

import org.quartz.Trigger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.quartz.CronTriggerFactoryBean;
import org.springframework.schedu