SpringBoot集成JavaMail发送邮件

项目环境

IDEA 2019.1
SpringBoot 2.1.5
Gradle 4.10

技术介绍

操作步骤

添加依赖

SpringBoot集成JavaMail需要先在build.gradle中添加依赖

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    compile (group: 'org.springframework.boot', name: 'spring-boot-starter-mail', version: '1.5.9.RELEASE'){
        exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'
    }
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

添加配置

配置P邮箱OP3服务

这里我采用的是163邮箱。在使用JavaMail发送前，需要开启邮箱的pop3设置。具体流程如下：

点击设置，选择POP3/SMTP/IMAP
勾选途中的POP3服务，弹出的框中点击确定
“设置客户端授权码”中选择“开启”
接下来会发送验证码到手机上，输入正确的验证码即可进入设置授权码的页面，输入完成后点击确定
在弹出的狂中点击确定即可

修改配置文件

在application.yml中增加发信邮箱的信息，

server:
  port: 8880
spring:
  mail:
    host: smtp.163.com
    username: xda265856@163.com
    password: xda265856
    properties:
      mail:
        smtp:
          auth: true
          timeout: 25000

host:163请使用示例中的，如果是其他邮箱如QQ等请自行百度
username:邮箱账号
password:这里是刚才设置的授权码，而不是登陆密码

编写代码

MailService.java

@Service
public class MailService {
    Logger logger = LoggerFactory.getLogger(MailService.class.getName());
    @Autowired
    private JavaMailSender mailSender;
    /**
     * 发件邮箱
     */
    @Value("${spring.mail.username}")
    private String emailFrom;

    public String getEmailFrom() {
        return emailFrom;
    }

    public void setEmailFrom(String emailFrom) {
        this.emailFrom = emailFrom;
    }

    public void sendAttachmentsMail(String to, String subject, String content,String filePath){
        MimeMessage message = mailSender.createMimeMessage();

        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(emailFrom);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);
            FileSystemResource file=new FileSystemResource(new File(filePath));
            //添加多个附件可以使用多条
            //helper.addAttachment(fileName,file);
            helper.addAttachment(filePath.substring(filePath.indexOf("/")+1),file);
            mailSender.send(message);
            logger.info("带附件的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送带附件的邮件时发生异常！", e);
        }
    }

    public void sendMail(String to, String subject, String content){
        MimeMessage message = mailSender.createMimeMessage();

        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(emailFrom);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);
            mailSender.send(message);
            logger.info("普通的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送带附件的邮件时发生异常！", e);
        }
    }

}

HelloController.java


@Controller
public class HelloController {
    Logger logger = LoggerFactory.getLogger(HelloController.class);
    @Autowired
    MailService mailService;

    @ResponseBody
    @RequestMapping(value = "/common/mail", method = {RequestMethod.GET})
    public String sendMail(){
        try {
            logger.debug("发送邮件");
            String subject = "测试普通邮件";
            String content = "测试普通邮件,邮件为系统发送，请勿回复！";
            mailService.sendMail("1249505842@qq.com", subject, content);
        } catch (Exception e) {
            logger.error("邮件发送失败，原因：{}",e.getMessage(),e);
        }
        return "success";
    }

    @ResponseBody
    @RequestMapping(value = "/attatch/mail", method = {RequestMethod.GET})
    public String sendAttatchMail(){
        try {
            logger.debug("附件邮件");
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            String format = dateFormat.format(new Date());
            String filePath = "file/attatch.txt";
            String content = "系统自动发送，"+" 发送日期："+format+",邮件为系统发送，请勿回复！";
            mailService.sendAttachmentsMail("1249505842@qq.com", "附件邮件", content,filePath);
        } catch (Exception e) {
            logger.error("邮件发送失败，原因：{}",e.getMessage(),e);
        }
        return "success";
    }
}