Java使用钉钉定时发送邮件到企业邮箱

相关步骤

• 配置发送邮件相关信息

 # 邮件服务配置
  mail:
    host: smtp.qiye.aliyun.com
    port: 465
    username: 发送者对应的邮箱账号
    password: 发送者对应的邮箱密码
    to: 目标邮箱账号，多个账号之间用英文逗号隔开；例如xxx@dd.com,www@dd.com

• 编写邮箱发送服务

import com.oaker.common.utils.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.security.Security;
import java.util.Properties;
@Component
@EnableScheduling //开启定时服务
public class MailServiceImpl {

    private static final Logger logger = LoggerFactory.getLogger(MailServiceImpl.class);

    @Value("${spring.mail.host}")
    private String host;

    @Value("${spring.mail.port}")
    private String port;


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

    @Value("${spring.mail.password}")
    private String password;

    @Value("${spring.mail.to}")
    private String to;



     @Scheduled(cron = "0 0 9 * * ? ") //每天上午九点发送邮件cron表达式具体用法可参考：https://blog.csdn.net/study_665/article/details/123506946
    public void sendUseHourExcel() {
        //设置SSL连接、邮件环境
        try {
            Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
            final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
            Properties props = System.getProperties();
            props.setProperty("mail.smtp.host", host);
            props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
            props.setProperty("mail.smtp.socketFactory.fallback", "false");
            //设置端口
            props.setProperty("mail.smtp.port", port);
            //启用调试
            props.setProperty("mail.debug", "true");
            props.setProperty("mail.smtp.socketFactory.port", port);
            props.setProperty("mail.smtp.auth", "true");
            //建立邮件会话
            Session session = Session.getDefaultInstance(props, new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(username, password);
                }
            });
            //建立邮件对象
            MimeMessage message = new MimeMessage(session);
            //设置邮件的发件人、收件人、主题
            //发件人账号
            message.setFrom(new InternetAddress(username));
            //收件人账号
            if (StringUtils.isEmpty(to)) {
                return;
            }
            String[] targets = to.split(",");
            Address[] addresses = new Address[targets.length];
            for (int i = 0; i < targets.length; i++) {
                addresses[i] = new InternetAddress(targets[i]);
            }
            message.setRecipients(Message.RecipientType.TO, addresses);
            //邮件标题
            message.setSubject("邮件标题");
            //内容
            Multipart multipart = new MimeMultipart();
            BodyPart contentPart = new MimeBodyPart();
            //邮件内容
            contentPart.setContent("您好，这是发送的邮件!", "text/html;charset=utf-8");
            multipart.addBodyPart(contentPart);
            message.setContent(multipart);
            Transport.send(message);
        } catch (Exception e) {
            e.printStackTrace();
            logger.info("发送邮箱失败:" + e.getMessage());
        }
    }
}

结语

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