spring boot 邮件发送

1、在pom.xml中添加maven依赖

     org.springframework.boot
     spring-boot-starter-mail

2、在application.properties文件中添加邮件相关配置

#邮件配置
spring.mail.host=邮件服务器地址
spring.mail.username=用户名
spring.mail.password=密码
spring.mail.default-encoding=UTF-8
#登录服务器是否需要认证
spring.mail.properties.mail.smtp.auth=true
#SSL证书Socket工厂
spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactory
#使用SMTPS协议465端口
spring.mail.properties.mail.smtp.socketFactory.port=465
 
#显示在收件人邮箱里面的发件人名称
spring.mail.self.username=用户名

3、编写邮件发送代码：MailSendService.java

package com.ldy.bootv2.demo.service;

import java.io.File;
import java.util.List;

import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
 
/**
 * @类名: MailSender

 * @描述: 邮件发送

 */
@Service
public class MailSendService {
	
	@Autowired
	JavaMailSender mailSender;
	
	//发件人名称设置
	@Value("${spring.mail.self.username}")
	private String sendUser;
	
	public void sendEmail(String toMail, String title, String content) throws MessagingException {
		final MimeMessage mimeMessage = mailSender.createMimeMessage();
		final MimeMessageHelper message = new MimeMessageHelper(mimeMessage);
		message.setFrom(sendUser);
		message.setTo(toMail);
		message.setSubject(title);
		message.setText(content);
		 
        mailSender.send(mimeMessage);
}
	
	/**
	 * @方法名: sendSimpleMail

	 * @描述: 发送普通文本格式的邮件
 
	 * @param toMail 收件人，多个用英文格式逗号分隔
	 * @param replyTo 抄送人，多个用英文格式逗号分隔
	 * @param title 邮件主题
	 * @param content 邮件内容
	 * @param flies 附件
	 * @throws Exception
	 */
	public void sendSimpleMail(String toMail, String replyTo, String title, String content, List files) throws Exception {
		final MimeMessage mimeMessage = mailSender.createMimeMessage();
		final MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
		helper.setFrom(sendUser);
		helper.setSubject(title);
		helper.setText(content);
		
		//设置多个收件人
		String[] toAddress = toMail.split(",");
		helper.setTo(toAddress);
		
		//设置多个抄送
		if(!StringUtils.isEmpty(replyTo)) {
			//helper.setReplyTo(replyTo);
			InternetAddress[] internetAddressCC = InternetAddress.parse(replyTo);  
			mimeMessage.setReplyTo(internetAddressCC);
		}
		
		//添加附件
		if(null != files) {
			for (File file : files) {
				helper.addAttachment(file.getName(), file);
			}
		}
		
		mailSender.send(mimeMessage);
	}
	
	/**
	 * @方法名: sendHtmlMail

	 * @描述: 发送HTML格式的邮件

	 * @param toMail 收件人，多个用英文格式逗号分隔
	 * @param replyTo 抄送人，多个用英文格式逗号分隔
	 * @param title 邮件主题
	 * @param htmlContent 邮件内容
	 * @param files 附件
	 * @throws Exception
	 */
	public void sendHtmlMail(String toMail, String replyTo, String title, String htmlContent, List files) throws Exception {
		final MimeMessage mimeMessage = mailSender.createMimeMessage();
		final MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
		helper.setFrom(sendUser);
		helper.setSubject(title);
		helper.setText(htmlContent, true);
		
		//设置多个收件人
		String[] toAddress = toMail.split(",");
		helper.setTo(toAddress);
		
		//设置多个抄送
		if(!StringUtils.isEmpty(replyTo)) {
			//helper.setReplyTo(replyTo);
			InternetAddress[] internetAddressCC = InternetAddress.parse(replyTo);  
			mimeMessage.setRecipients(RecipientType.CC,internetAddressCC);
		}
		
		//添加附件
		if(null != files) {
			for (File file : files) {
				helper.addAttachment(file.getName(), file);
			}
		}
		
		mailSender.send(mimeMessage);
	}
	
}

完成上面的代码后，在发送邮件的java类里面注入MailSendService，直接调用对应的方法即可