spring boot整合发送邮箱（可一次发送多个）

一。邮箱要先开启IMAP/SMTP服务，开启后会显示授权码，保存下来，这是发送邮件时需要的密码。（我这是qq邮箱）

 

 

 

 

 

 

 

 

 

二。pom.xml，引入依赖

<dependency>

　　<groupId>org.springframework.boot</groupId>

　　<artifactId>spring-boot-starter-mail</artifactId>

</dependency>

 

三。.properties 添加配置

#qq邮箱
spring.mail.host=smtp.qq.com
spring.mail.username=自己的邮箱
spring.mail.password=开启IMAP/SMTP服务后显示的密码
spring.mail.protocol=smtp
spring.mail.default-encoding=UTF-8

四。写成组件

@Component("EmailTool")
public class EmailTool {

    @Value("${spring.mail.username:}")
    private String sendEmail;

    @Autowired
    private JavaMailSender javaMailSender;

    /**
     * 发送普通邮件
     **/
    public boolean sendEmail(Map<String, Object> dataMap) {
        try {
            if (dataMap == null || dataMap.size() <= 0) {
                return false;
            }
            SimpleMailMessage message = new SimpleMailMessage();
            //发送邮箱
            message.setFrom(sendEmail);
            //接收邮箱(可传多个值,如：String[] ems = new String[]{"[e-mail]","[e-mail]"})
            message.setTo((String[]) dataMap.get("sendToEmail"));
            //标题
            message.setSubject(dataMap.get("title").toString());
            //内容
            message.setText(dataMap.get("content").toString());
            javaMailSender.send(message);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 发送HTML邮件，可以整合邮件模板使用，这里就弄简单点
     **/
    public boolean sendHtmlEmail(Map<String, Object> dataMap) {
        try {
            if (dataMap == null || dataMap.size() <= 0) {
                return false;
            }
            MimeMessage mimeMessage = javaMailSender.createMimeMessage();
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage);
            mimeMessageHelper.setFrom(sendEmail);
            mimeMessageHelper.setTo((String[]) dataMap.get("sendToEmail"));
            mimeMessageHelper.setSubject(dataMap.get("title").toString());
            //内容，如 <h1>标题</h1><br/><p>这是内容</p>
            mimeMessageHelper.setText(dataMap.get("content").toString(), true);

            javaMailSender.send(mimeMessageHelper.getMimeMessage());
            return true;
        } catch (MessagingException e) {
            e.printStackTrace();
            return false;
        }
    }
}

五。测试

　　@Autowired
　　public EmailTool emailTool;

    @Test
    public void contextLoads() throws MessagingException {
        String[] ems = new String[]{"[e-mail]","[e-mail]"};
        Map<String, Object> valueMap = new HashMap<>();
        valueMap.put("sendToEmail",ems);
        valueMap.put("title", "测试邮件标题");
        valueMap.put("content", "测试邮件内容");
        emailTool.sendEmail(valueMap);
    }

参考文档：
https://www.cnblogs.com/happy4java/p/11205907.html