异步任务，邮件发送

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异步任务

1、在启动类添加@EnableAsync ，表示 开启异步注解功能

2、在方法上添加@Async，表示异步方法

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@Service
public class AsyncService {
    // 使用注解表示异步任务
    @Async
    public  void hello(){
        try {
            sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("数据正在处理......");
    }
}

3、在Controller中直接调用即可

邮件发送

1、导入依赖

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

2、打开邮箱的POP3/SMTP服务获取授权码，设置->账户->开启pop3和smtp服务

3、编写配置文件

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@RestController
public class EmailController {
    @Autowired
    private JavaMailSenderImpl mailSender;

    @RequestMapping("/sendMail")
    public String sendMail(){
        SimpleMailMessage mailMessage = new SimpleMailMessage();
        mailMessage.setSubject("通知");
        mailMessage.setText("hello");
        mailMessage.setTo("2824199842@qq.com");
        mailMessage.setFrom("2824199842@qq.com");
        mailSender.send(mailMessage);
        return "send ok";
    }

    @RequestMapping("/sendMail2")
    public String sendMail2() throws Exception{
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true);
        helper.setSubject("通知");
        helper.setText("<p style='color:red'>hello~</p>",true);
        helper.addAttachment("1.jpg",new File("C:\\Users\\28241\\Pictures\\Saved Pictures\\1.jpg"));// 附件
        helper.setTo("2824199842@qq.com");
        helper.setFrom("2824199842@qq.com");
        mailSender.send(mimeMessage);
        return "send ok";
    }
}