SpringBoot整合 定时任务 Scheduled

<?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>2.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.Alan</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>SpringBootScheduled</name>
    <description>SpringBootScheduled</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--添加Scheduled 坐标-->
        <!--
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-quartz</artifactId>
        </dependency>
        -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</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>

</project>

package com.alan.scheduled;

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

/***
 *
 *
 * @user Alan_liu
 * @date 2021/6/2 22:16
 */
@SpringBootApplication
//开启默认启动定时任务
@EnableScheduling
public class SpringBootScheduledApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootScheduledApplication.class, args);
    }

}

package com.alan.scheduled.scheduled;
/*
 *  scheduled 定时任务
 *
 * @author: Alan_liu
 * @date 2021/6/2 22:03
 */

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class ScheduledDemo {

    /**
     * 定时任务方法：
     *  *@Scheduled ：设置定时任务
     *  cron 属性：cron表达式(定任务触发时间的字符串表达形式)。

     * 0/2 * * * * ?  每2秒钟触发 一次定时任务
     */
    @Scheduled(cron = "0/2 * * * * ?")
    public void scheduledMethod(){
        System.out.println("定时器触发"+new Date());
    }

}

package com.alan.scheduled;

import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class SpringBootScheduledApplicationTests {

    @Test
    void contextLoads() {
    }

}