详解Springboot中的异步、定时、邮件任务

package com.rk.service;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
@Service
public class AsyncService {
    public void hello(){
        try {
            System.out.println("数据处理中~");
            Thread.sleep(3000);//停止三秒
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

package com.rk.controller;
import com.rk.service.AsyncService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class AsyncController {
    @Autowired
    AsyncService asyncService;
    @GetMapping("/hello")
    public String hello(){
        asyncService.hello();
        return "success";
    }
}

 @Async//告诉spring这是一个异步方法
    public void hello(){
        try {
            System.out.println("数据处理中~");
            Thread.sleep(3000);//停止三秒
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

@EnableAsync//开启异步注解功能
@SpringBootApplication
public class Springboot09TestApplication {
    public static void main(String[] args) {
        SpringApplication.run(Springboot09TestApplication.class, args);
    }
}

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

#用户名
spring.mail.username=1624603357@qq.com
#密码
spring.mail.password=yblyxhvmnsurbbci
#发送邮件服务器
spring.mail.host=smtp.qq.com
#开启加密验证 ssl
spring.mail.properties.mail.smtp.ssl.enable=true

     @Autowired
    JavaMailSenderImpl mailSender;
 
 
     @Test
    void contextLoads() {
        SimpleMailMessage mailMessage = new SimpleMailMessage();
        mailMessage.setSubject("你好，rk");//邮件标题
        mailMessage.setText("测试邮件");//邮件内柔
        mailMessage.setTo("r1624603357@126.com");//收件人邮箱
        mailMessage.setFrom("1624603357@qq.com");//发件人邮箱
        mailSender.send(mailMessage);
 
    }

    @Test
    void contextLoads2() throws MessagingException {
        //一个复杂的邮件
        MimeMessage mimeMessage = mailSender.createMimeMessage();
 
        //组装
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
 
        //正文
        helper.setSubject("你好,rk");
        helper.setText("<h1 style='color:red'>测试邮件</h1>",true);
 
        //附件
        helper.addAttachment("1.png",new File("D:\\QLDownloadGame\\2\\1.png"));
        helper.addAttachment("rk.docx",new File("E:\\桌面\\rk.docx"));
 
        // 发/收件人
        helper.setTo("r1624603357@126.com");
        helper.setFrom("1624603357@qq.com");
 
        //发送
        mailSender.send(mimeMessage);
 
    }

@Service
public class ScheduledService {
    //秒 分 时 日 月 周几
    //0 * * * * MON-FRI
    //注意cron表达式的用法；   每天20:28 0秒执行该方法
    @Scheduled(cron = "0 28 20 * * 0-7")
    public void hello(){
        System.out.println("现在是20:28");
        System.out.println("hello.....");
    }
}

@EnableAsync//开启异步注解功能
@EnableScheduling//开启定时功能注解
@SpringBootApplication
public class Springboot09TestApplication {
    public static void main(String[] args) {
        SpringApplication.run(Springboot09TestApplication.class, args);
    }
}