简单的发邮件功能实现

1.引入pom

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

2、在application.properties中添加邮箱配置

spring.mail.host=smtp.qiye.163.com //邮箱服务器地址
spring.mail.username=xxx@oo.com //用户名
spring.mail.password=xxyyooo    //密码
spring.mail.default-encoding=UTF-8

mail.fromMail.addr=xxx@oo.com  //以谁来发送邮件


实例：
spring.mail.host=192.168.*.*
spring.mail.username=wangwei3@inner.sss.com
spring.mail.password=wangwei3
spring.mail.default-encoding=UTF-8

mail.fromMail.addr=wangwei3@inner.sss.com

3、编写mailService,这里只提供实现类。

@Component //或者@Service
public class MailServiceImpl implements MailService{
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private JavaMailSender mailSender;

    @Value("${mail.fromMail.addr}")

    private String from;

    @Override
    public void sendSimpleMail(String to, String subject, String content) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(from);
        message.setTo(to);
        message.setSubject(subject);
        message.setText(content);
        try {
            mailSender.send(message);
            logger.info("简单邮件已经发送。");
        } catch (Exception e) {
            logger.error("发送简单邮件时发生异常！", e);
        }

    }
}

4、编写test类进行测试

@RunWith(SpringRunner.class)
@SpringBootTest
public class MailServiceTest {

    @Autowired
    private MailService MailService;

    @Test
    public void testSimpleMail() throws Exception {
        MailService.sendSimpleMail("ityouknow@126.com","test simple mail"," hello this is simple mail");
    }
}

到此一个简单的邮件发送就结束了，还可以发送内容丰富的其他邮件模板，请参考

https://www.cnblogs.com/ityouknow/p/6823356.html

但是有坑，常见错误

解决方案：

1.开启Telnet

2.添加：-Xms512m -Xmx800m -Djava.net.preferIPv4Stack=true

如果还不行，参考下面链接，一般要更改tomcat，https://my.oschina.net/itblog/blog/618842