springboot send mail (5): use thymeleaf template to send mail

Springboot implements mail function: use thymeleaf template to send mail

1. Build a springboot project, import dependencies; application.properties configuration file, see

springboot send mail (1): send simple mail

To use the thymeleaf template, you need to add in application.properties:

# THYMELEAF (ThymeleafAutoConfiguration)
spring.thymeleaf.check-template-location=true
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.excluded-view-names= # comma-separated list of view names   that should be excluded from resolution
spring.thymeleaf.view-names= # comma-separated list of view names that can be resolved
spring.thymeleaf.suffix=.html
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.content-type=text/html # ;charset=<encoding> is added

If it is not added, an error will be reported.

2. Write the service interface and implement the class:

/**
 * Mail service interface
 * Created by ASUS on 2018/5/5
 *
 * @Authod Grey Wolf
 */
 public interface MailService {
 /**
      * Send html format emails
      * @param to
 * @param subject
 * @param content
 */
 void sendHtmlMail (String to , String subject , String content) ;
 }


                       

/**
 *
 * 邮件服务类
 * Created by ASUS on 2018/5/5
 *
 * @Authod Grey Wolf
 */
@Service("mailService")
public class MailServiceImpl implements MailService {


    @Autowired
private JavaMailSender mailSender;
@Value("${mail.fromMail.addr}")
    private String form;
    
        

    /**
      * Send mail in html format
      * @param to recipient
      * @param subject      * @param content      */
 @Override
 public void sendHtmlMail (String to , String subject ,
 String content
 ) {        
        MimeMessage message= mailSender .createMimeMessage() ;
         try {
             //true means that a multipart message needs to be created
             MimeMessageHelper helper= new MimeMessageHelper(message ,true ) ;
             helper.setFrom( form ) ;
             helper.setTo( form ) ;
             helper.setSubject(subject ) ;
             helper.setText(content ,true ) ;
 mailSender .send(message) ;
 System. out .println( "Successfully sent email in html format" ) ;
 } catch                                (Exception e){
            System.out.println ( " Failed to send email in html format" ) ;
         }
    }

  


}

3. Write the test class:

/**
 * Send mail test class
 * Created by ASUS on 5/5/2018
 *
 * @Authod Grey Wolf
 */
 @RunWith (SpringRunner. class )
 @SpringBootTest
 public class MailTest {

    @Autowired
private MailService mailService;
@Autowired
private TemplateEngine templateEngine;
@Value("${mail.fromMail.addr}")
    private String form;
    
        
    

    @Test
    public void sendTemplateMail() throws  Exception{
        //创建邮件正文
         //是导这个包import org.thymeleaf.context.Context;
        Context context = new Context();
        context.setVariable("username","Grey Wolf");
        //获取thymeleaf的html模板
        String emailContent= templateEngine.process("template", context);
        mailService.sendHtmlMail(form,"这是thymeleaf模板邮件",emailContent);
    }

}

4.测试效果：

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