介绍

发邮件mail是常见的软件功能，下面利于spring和java的mail库实现发送内容支持html，带多附件的案例

开启SMTP邮件发送协议

谁提供的SMTP邮件服务，就找谁开启。QQ邮箱类似。

依赖

        <!--Java MAil 发送邮件API--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-mail</artifactId></dependency><dependency><groupId>javax.mail</groupId><artifactId>javax.mail-api</artifactId><version>1.6.2</version></dependency>

代码

package com.mail;import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;/*** @version v1.0 创建时间：2023/11/20 15:59* @author: 作者：陈子枢* @web CSDN：https://blog.csdn.net/nutony* @description 描述：读取属性配置文件，发送邮件*/@Slf4j
@PropertySource("classpath:mail.properties")
public class MailClient {@Value("${host}")private String minioUrl;@Value("${port}")private int port;public static void sender(String form, String cc, String subject, String html, List<String> attachments) throws javax.mail.MessagingException {JavaMailSenderImpl sender = new JavaMailSenderImpl();sender.setHost("smtp.163.com");sender.setPort(25);sender.setUsername(form);sender.setPassword("配置的授权码");sender.setDefaultEncoding("UTF-8");// 简化对mimeMessage的封装MimeMessage message = sender.createMimeMessage();MimeMessageHelper helper = new MimeMessageHelper(sender.createMimeMessage(), true, "UTF-8");helper.setFrom(sender.getUsername());  //邮件发送人helper.setCc(cc);                  //抄送helper.setSubject(subject);            //标题helper.setText(html,true);       //正文//邮件附件for(String attachment: attachments) {File file = new File(attachment);helper.addAttachment(file.getName(), file);}sender.send(helper.getMimeMessage());}public static void main(String[] args) throws MessagingException, javax.mail.MessagingException {List<String> attachments = new ArrayList<>();attachments.add("d:\\1.png");attachments.add("d:\\2.png");MailClient.sender("13261758319@163.com", "52399178@qq.com", "HTML邮件", "<h1 style='color:red'>hello,world!</h1>",attachments);log.info("邮件发送成功！");}}