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.comport: 465username: 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/123506946public 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() {@Overrideprotected 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());}}
}