Spring Boot发送邮件详解

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

spring.mail.host=smtp.qq.com 
spring.mail.username=用户名 //发送方的邮箱
spring.mail.password=密码 //对于qq邮箱而言 密码指的就是发送方的授权码
spring.mail.properties.mail.smtp.auth=true 
spring.mail.properties.mail.smtp.starttls.enable=true 
spring.mail.properties.mail.smtp.starttls.required=true

@Service 
public class MailService { 
 private final Logger logger = LoggerFactory.getLogger(this.getClass()); 
  
 @Autowired 
 private JavaMailSender sender; 
  
 @Value("${spring.mail.username}") 
 private String from; 
  
 /** 
  * 发送纯文本的简单邮件 
  * @param to 
  * @param subject 
  * @param content 
  */ 
 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 { 
   sender.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); 
  } 
 } 
  
 /** 
  * 发送html格式的邮件 
  * @param to 
  * @param subject 
  * @param content 
  */ 
 public void sendHtmlMail(String to, String subject, String content){ 
  MimeMessage message = sender.createMimeMessage(); 
 
  try { 
   //true表示需要创建一个multipart message 
   MimeMessageHelper helper = new MimeMessageHelper(message, true); 
   helper.setFrom(from); 
   helper.setTo(to); 
   helper.setSubject(subject); 
   helper.setText(content, true); 
 
   sender.send(message); 
   logger.info("html邮件已经发送。"); 
  } catch (MessagingException e) { 
   logger.error("发送html邮件时发生异常！", e); 
  } 
 } 
  
 /** 
  * 发送带附件的邮件 
  * @param to 
  * @param subject 
  * @param content 
  * @param filePath 
  */ 
 public void sendAttachmentsMail(String to, String subject, String content, String filePath){ 
  MimeMessage message = sender.createMimeMessage(); 
 
  try { 
   //true表示需要创建一个multipart message 
   MimeMessageHelper helper = new MimeMessageHelper(message, true); 
   helper.setFrom(from); 
   helper.setTo(to); 
   helper.setSubject(subject); 
   helper.setText(content, true); 
 
   FileSystemResource file = new FileSystemResource(new File(filePath)); 
   String fileName = filePath.substring(filePath.lastIndexOf(File.separator)); 
   helper.addAttachment(fileName, file); 
    
   sender.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); 
  } 
 } 
  
 /** 
  * 发送嵌入静态资源（一般是图片）的邮件 
  * @param to 
  * @param subject 
  * @param content 邮件内容，需要包括一个静态资源的id，比如：<img src=\"cid:rscId01\" > 
  * @param rscPath 静态资源路径和文件名 
  * @param rscId 静态资源id 
  */ 
 public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId){ 
  MimeMessage message = sender.createMimeMessage(); 
 
  try { 
   //true表示需要创建一个multipart message 
   MimeMessageHelper helper = new MimeMessageHelper(message, true); 
   helper.setFrom(from); 
   helper.setTo(to); 
   helper.setSubject(subject); 
   helper.setText(content, true); 
 
   FileSystemResource res = new FileSystemResource(new File(rscPath)); 
   helper.addInline(rscId, res); 
    
   sender.send(message); 
   logger.info("嵌入静态资源的邮件已经发送。"); 
  } catch (MessagingException e) { 
   logger.error("发送嵌入静态资源的邮件时发生异常！", e); 
  } 
 } 
}

public class MailTests extends BasicUtClass{ 
 @Autowired 
 private MailService mailService; 
  
 private String to = "xujijun@mail.cn"; 
  
 @Test 
 public void sendSimpleMail() { 
  mailService.sendSimpleMail(to, "主题：简单邮件", "测试邮件内容"); 
 } 
 
}