spring boot 发送邮件

简单几步，实现在spring boot中发送邮件：

1、引入依赖：
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<dependency>  
    <groupId>org.springframework.boot</groupId>  
    <artifactId>spring-boot-starter-mail</artifactId>  
</dependency>  

2、application.yml中配置邮件相关的参数：
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spring:  
  mail:  
    host: smtp.exmail.qq.com  
    username: 用户名  
    password: 密码  
    properties:  
      mail:  
        smtp:  
          auth: true  
          starttls:  
            enable: true  
            required: true  

3、邮件service代码：

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@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);  
        }  
    }  
}  

4、单元测试代码：

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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");  
    }  

    @Autowired  
    VelocityEngine velocityEngine;  

    @Test  
    public void sendHtmlMail() {  
        Map<String, Object> model = new HashMap<String, Object>();  
        model.put("time", XDateUtils.nowToString());  
        model.put("message", "这是测试的内容。。。");  
        model.put("toUserName", "张三");  
        model.put("fromUserName", "老许");  
        String content = VelocityEngineUtils.mergeTemplateIntoString(velocityEngine, "welcome.vm", "UTF-8", model);  

        mailService.sendHtmlMail(to, "主题：html邮件", content);  
    }  

    @Test  
    public void sendAttachmentsMail() {  
        mailService.sendAttachmentsMail(to, "主题：带附件的邮件", "有附件，请查收！", "C:\\Users\\Xu\\Desktop\\csdn\\1.png");  
    }  

    @Test  
    public void sendInlineResourceMail() {  
        String rscId = "rscId001";  
        mailService.sendInlineResourceMail(to,  
                "主题：嵌入静态资源的邮件",  
                "<html><body>这是有嵌入静态资源：<img src=\'cid:" + rscId + "\' ></body></html>",  
                "C:\\Users\\Xu\\Desktop\\csdn\\1.png",  
                rscId);  
    }  
}  

源代码参考：https://github.com/xujijun/my-spring-boot

版权声明：本文为原创文章，转载请注明转自Clement-Xu的csdn博客。 https://blog.youkuaiyun.com/ClementAD/article/details/51833416