使用java实现BBS论坛发送邮件过程详解

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
    <version>2.4.4</version>
</dependency>

@Component
public class MailClient {
private staticfinal Logger logger= LoggerFactory.getLogger(MailClient.class);
@Autowired
private JavaMailSender javaMailSender;
@Value("${spring.mail.username}")
private String from;
public voidsendMail(String to,String subject,String context){
     try {
      MimeMessage message= javaMailSender.createMimeMessage();
      MimeMessageHelper helper = new MimeMessageHelper(message);
      helper.setFrom(from);
      helper.setTo(to);
      helper.setSubject(subject);
      helper.setText(context,true);//不加true表示是默认文本，加了true表示支持html文本
      javaMailSender.send(helper.getMimeMessage());
      } catch (MessagingException e) {
        logger.error("发送邮件失败"+e.getMessage());
       }
   }
}

@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = CommunityApplication.class)
public class MailTests {
    @Autowired
    private MailClient mainClient;
    @Test
    public void  testTextMail(){
        mainClient.sendMail("596844484@qq.com","java yyds", "Welcome");
    }
}

@Autowired
private TemplateEngine templateEngine;
@Test
//注意这里的Context 是Thymeleaf下的
public void testTextMailHtml(){
  Context context=new Context();
  context.setVariable("username", "小傻瓜"); //从这里取值
  String process = templateEngine.process("/mail/demo", context);
  System.out.println(process);
  mailClient.sendMail("18215626061@sina.com","java yyds", "Welcome");
}