Spring Boot简单实现发送邮件功能

我们先看发送邮件所需要的依赖

1 <dependency>
2         <groupId>org.springframework.boot</groupId>
3         <artifactId>spring-boot-starter-mail</artifactId>
4 </dependency>

然后是邮件服务器的配置

spring.mail.host=smtp.163.com
spring.mail.username=*********@163.com
spring.mail.password=********      //授权码
spring.mail.default-encoding=utf-8

mail.fromMail.addr=******

在这里我使用的是163免费邮箱,各类邮箱服务器地址请参考 https://blog.csdn.net/lingduo24/article/details/81137773

在密码这里我遇到了一个坑,就是你需要去开启授权并设置授权码,最后使用授权码来登陆连接

至此,准备工作已经完成,接下来看发送邮件的方法类

@Component
@Slf4j
public class MailService {

    @Autowired
    private JavaMailSender mailSender;

    @Value("${mail.fromMail.addr}")
    private String from;

第一种是发送最简单的邮件,即一段文本,方法如下

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);
            log.error("简单邮件已经发送。");
        } catch (Exception e) {
            log.error("发送简单邮件时发生异常!",e);
        }
    }

测试方法如下

 1 @RunWith(SpringRunner.class)
 2 @SpringBootTest
 3 public class MailServiceTest {
 4 
 5     @Autowired
 6     private MailService mailService;
 7 
 8     @Autowired
 9     private TemplateEngine templateEngine;
10 
11     @Test
12     public void sendSimpleMail() {
13         mailService.sendSimpleMail("**********@qq.com","test simple mail","hello this is simple mail");
14     }

第二种是发送一段HTML格式的邮件,方法如下

 1 public void sendHtmlMail(String to, String subject, String content) {
 2         MimeMessage message = mailSender.createMimeMessage();
 3 
 4         try {
 5             MimeMessageHelper helper = new MimeMessageHelper(message, true);
 6             helper.setFrom(from);
 7             helper.setTo(to);
 8             helper.setSubject(subject);
 9             helper.setText(content, true);
10 
11             mailSender.send(message);
12             log.error("HTML邮件已经发送。");
13         } catch (Exception e) {
14             log.error("发送HTML邮件时发生异常!",e);
15         }
16     }

测试方法如下

1 @Test
2     public void sendHtmlMail() {
3         String content = "<html>\n" +
4                             "<body>\n" +
5                                 "<h3>Hello World!这是一封HTML邮件!</h3>\n" +
6                             "</body>\n" +
7                          "</html>";
8         mailService.sendHtmlMail("************","test html mail",content);
9     }

第三种是发送模板邮件,在这里我以thymeleaf为模板,我们首先添加thymeleaf的依赖

1 <dependency>
2             <groupId>org.springframework.boot</groupId>
3             <artifactId>spring-boot-starter-thymeleaf</artifactId>
4 </dependency>

然后在resources\templates路径下添加HTML文件EmailTemplate.html

 1 <!DOCTYPE html>
 2 <html lang="zh" xmlns:th="http://www.thymeleaf.org">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6 </head>
 7 <body>
 8     尊敬的<span th:text="${name}"/> 9     您好,这是一封模板邮件,
10 </body>
11 </html>

发送模板邮件时我们使用的依然是发送HTML的方法,只是对HTML进行了处理,测试方法如下

@Test
    public void sendTemplateMail() {
        Context context = new Context();
        context.setVariable("name","******");
        String emailContent = templateEngine.process("EmailTemplate",context);
        mailService.sendHtmlMail("************","test template mail",emailContent);
    }

第四种是发送带附件的邮件,方法如下

 1 public void sendAttachmentsMail(String to, String subject, String content, String filePath) {
 2         MimeMessage message = mailSender.createMimeMessage();
 3 
 4         try {
 5 
 6             MimeMessageHelper helper = new MimeMessageHelper(message,true);
 7             helper.setFrom(from);
 8             helper.setTo(to);
 9             //helper.setCc();
10             //helper.setBcc();
11             helper.setSubject(subject);
12             helper.setText(content,true);
13 
14             FileSystemResource file = new FileSystemResource(new File(filePath));
15             String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
16             helper.addAttachment(fileName,file);
17 
18             mailSender.send(message);
19             log.error("带附件邮件已经发送。");
20         } catch (MessagingException e) {
21             log.error("带附件邮件发送发生异常!",e);
22         }
23     }

当有多个附件时,我们可以多次使用addAttachment方法,测试方法如下

@Test
    public void sendAttachmentsMail() {
        String filePath = "*****************";
        mailService.sendAttachmentsMail("*************@qq.com","test attachment email","有附件,请注意查收!",filePath);
    }

以上就是简单使用Springboot发送邮件的四种方法,所有测试方法亲测无误

欢迎指正交流!

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转载自www.cnblogs.com/JINJAY/p/10817964.html