java发送邮件方法的整理

 <!-- email -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-email</artifactId>
      <version>1.4</version>
    </dependency>

@Getter
@Setter
@ToString
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Mail {

    private String subject;

    private String message;

    private Set<String> receivers;
}

import com.mmall.beans.Mail;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.HtmlEmail;

@Slf4j
public class MailUtil {

    public static boolean send(Mail mail) {

        // TODO
        String from = "";
        int port = 25;
        String host = "";
        String pass = "";
        String nickname = "";

        HtmlEmail email = new HtmlEmail();
        try {
            email.setHostName(host);
            email.setCharset("UTF-8");
            for (String str : mail.getReceivers()) {
                email.addTo(str);
            }
            email.setFrom(from, nickname);
            email.setSmtpPort(port);
            email.setAuthentication(from, pass);
            email.setSubject(mail.getSubject());
            email.setMsg(mail.getMessage());
            email.send();
            log.info("{} 发送邮件到 {}", from, StringUtils.join(mail.getReceivers(), ","));
            return true;
        } catch (EmailException e) {
            log.error(from + "发送邮件到" + StringUtils.join(mail.getReceivers(), ",") + "失败", e);
            return false;
        }
    }

}

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

spring:
  mail:
    host: 域 (比如qq的为smtp.qq.com;163的为smtp.163.com)
    username: 邮箱
    password: SMTP服务密码（非邮箱密码，可在邮件设置中设置）
    properties:
      mail:
        smtp:
          auth: true

import org.springframework.mail.javamail.JavaMailSender;

 @Autowired
 private JavaMailSender javaMailSender;

private void sendAlertMessage(String message){
        SimpleMailMessage simpleMailMessage =new SimpleMailMessage();
        simpleMailMessage.setFrom("");
        simpleMailMessage.setTo("");
        simpleMailMessage.setSubject("");
        simpleMailMessage.setText(message);

        javaMailSender.send(simpleMailMessage);
    }