Spring Boot----异步任务、定时任务、邮件任务

妖狐艹你老母 2021-10-19 12:14 405阅读 0赞

# 1、创建项目：只需要选择web模块即可测试 #

# 2、异步任务（使用多线程） #

## 2.1 @EnableAsync ##

//开启异步功能
    @EnableAsync
    @SpringBootApplication
    public class Springboot13Application {
        public static void main(String[] args) {
            SpringApplication.run(Springboot13Application.class, args);
        }
    }

## 2.2 @Async ##

@Service
    public class TestService {
        //表示这是一个异步方法
        @Async
        public void test(){
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("处理中");
        }
    }

# 3、定时任务 #

##  3.1 @EnableScheduling ##

//开启任务
    @EnableScheduling
    @SpringBootApplication
    public class Springboot13Application {
        public static void main(String[] args) {
            SpringApplication.run(Springboot13Application.class, args);
        }
    }

## 3.2 @Scheduled ##

@Service
    public class TestService {
        // 0 0/5 14,18 * * ?    每天14点整,和18点整,每隔5分钟执行一次
        // 0 15  10 ？ * 1-6    每个月的周一至周六10：15分执行一次
        // 0 0 2 ? * 6L         每个月的最后一个周六凌晨2点执行一次
        // 0 0 2 LW * ?         每个月的最后一个工作日凌晨2点执行一次
        // 0 0 2-4 ? * 1#1      每个月的第一个周一凌晨2点到4点期间，每个整点都执行一次；*/
        //0/4 * * * * * :       每4秒执行一次
        @Scheduled(cron = "0 * * 20 8 TUE")
        public void test(){
            System.out.println("定时任务执行...");
        }
    }

![1527592-20190821083328959-1475551215.png][]

![1527592-20190821083331589-1318217316.png][]

# 4 、邮件任务 #

## 4.1 引入依赖 ##

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

## 4.2 application.properties ##

spring.mail.username=1847003070@qq.com
    spring.mail.password=xyxvywpfxzscejxx
    spring.mail.host=smtp.qq.com

## 4.3 测试 ##

@Autowired
        JavaMailSender javaMailSender;
    
        @Test
        public void test(){
            //简单邮件测试
            SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
            simpleMailMessage.setSubject("通知");
            simpleMailMessage.setText("今天放假啦");
            simpleMailMessage.setTo("760423314@qq.com");
            simpleMailMessage.setFrom("1847003070@qq.com");
            javaMailSender.send(simpleMailMessage);
        }
        @Test
        public void test2() throws MessagingException {
            //复杂邮件测试
            MimeMessage mimeMessage = javaMailSender.createMimeMessage();
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
    
            mimeMessageHelper.setSubject("通知");
            mimeMessageHelper.setText("<b>今天放假啦</b>",true);
            mimeMessageHelper.setFrom("1847003070@qq.com");
            mimeMessageHelper.setFrom("760423314@qq.com");
    
            //上传文件
            mimeMessageHelper.addAttachment("1.jpg",new File("C:\\Users\\Public\\Pictures\\Sample Pictures"));
    
        }

转载于:https://www.cnblogs.com/yanxiaoge/p/11386069.html

[1527592-20190821083328959-1475551215.png]: /images/20211018/554a34b097fd41008c8dccc7b897eba7.png
[1527592-20190821083331589-1318217316.png]: /images/20211018/6abf3fdbc72d47048492e377e2f5be07.png