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@SpringBootApplication
@EnableAsync
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
不需要进行同步等待
@Async
public void hello() {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("数据处理中");
}
@EnableScheduling
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
package com.example.demo.service;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
@Service
public class ScheduledService {
/**
* second秒，minute分，hour时，day of month日，month月，day of week周几
*/
@Scheduled(cron = "0 * * * * MON-FRI")
public void sayYes(){
System.out.println("yes");
}
}
Cron表达式的详细用法
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
<version>2.1.4.RELEASE</version>
</dependency>
SpringBoot会自动配置MailSenderAutoConfiguration
需要手动定义MailProperties内容
#邮箱地址
spring.mail.username=xxxx@qq.com
#授权码
spring.mail.password=xxxx
spring.mail.host=smtp.qq.com
spring.mail.properties.mail.smtp.ssl.enable=true
授权码生成
错误原因，读取配置文件中的邮箱地址错误，需要在代码中指定发送方邮箱地址，配置文件中的也不能删除或注释掉。
package test.com.example.demo;
import com.example.demo.DemoApplication;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = DemoApplication.class)
public class DemoApplicationTest {
@Autowired
JavaMailSenderImpl javaMailSender;
@Test
public void sendMail() {
SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
simpleMailMessage.setSubject("通知");
simpleMailMessage.setText("wozaiceshiyouxiang");
simpleMailMessage.setTo("xxxx@qq.com");
simpleMailMessage.setFrom("xxxx@qq.com");
javaMailSender.send(simpleMailMessage);
}
}
还可以上传文件，发送邮件给多个人，此处只有简单案例
@Test
public void sendMail2() {
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
try {
MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
mimeMessageHelper.setFrom("xxxx@qq.com");
mimeMessageHelper.setText("我在做测试");
mimeMessageHelper.setTo("xxxx@qq.com");
} catch (MessagingException e) {
e.printStackTrace();
}
javaMailSender.send(mimeMessage);
}
