前言

来个需求，需要给注册用户发送特定的邮件内容，所以就有了这篇博文咯。

准备条件(本文以网易邮箱为例)

邮箱账号必须要开启 SMTP 服务

设置授权码

编码实现

maven

com.sun.mail

javax.mail

1.4.7

EmailUtil

import javax.mail.*;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import java.util.Arrays;

import java.util.Date;

import java.util.List;

import java.util.Properties;

/**

* @Author 954

* @create 2019/6/27 13:46

*/

public class EmailUtil {

// 发送者别名

private static final String SENDER_NAME = "XXX" ;

// 发送邮箱地址

private static final String SENDER_ADDRESS = "XXX@163.com" ;

// 发送邮箱的授权码

private static final String SENDER_PWD = "XXX" ;

// 密送的邮箱地址

private static final String PRIVATE_ADDRESS = "XXX@163.com" ;

/**

* 发送邮件的环境对象

*/

private static final Session EMAIL_SESSION = getEmailSession();

/**

* 批量发送电子邮件

* @param emailAddressList 邮箱地址

* @param content 邮件内容

* @param title 邮件标题

* @param fileList 附件

* @throws Exception

*/

public synchronized void sendEmail(ListemailAddressList, String title, String content, ListfileList) throws Exception {

MimeMessage mimeMessage = getMimeMessage(emailAddressList, title, content);

if (!CollectionUtils.isEmpty(fileList)){

// 处理附件

Multipart multipart = getMultipart(fileList);

mimeMessage.setContent(multipart);

// 添加邮件内容

BodyPart contentPart = new MimeBodyPart();

contentPart.setContent(content, "text/html;charset=UTF-8");

// 将multipart对象放入message中

multipart.addBodyPart(contentPart);

}

Transport.send(mimeMessage);

}

private MimeMessage getMimeMessage(ListemailAddressList, String title, String content) throws Exception {

// 创建邮件消息

MimeMessage message = new MimeMessage(EMAIL_SESSION);

// 设置发件人

message.setFrom(new InternetAddress(SENDER_ADDRESS, SENDER_NAME));

// 设置收件人

InternetAddress[] address = new InternetAddress[emailAddressList.size()] ;

for (int i = 0; i < emailAddressList.size(); i++){

address[i] = new InternetAddress(emailAddressList.get(i)) ;

}

message.setRecipients(Message.RecipientType.TO, address);

// 设置密送

message.setRecipient(Message.RecipientType.BCC, new InternetAddress(PRIVATE_ADDRESS));

// 设置邮件标题

message.setSubject(title, "UTF-8");

// 设置邮件的内容体

message.setContent(content, "text/html;charset=UTF-8");

// 设置发送时间

message.setSentDate(new Date());

return message;

}

private Multipart getMultipart(ListfileList) {

if (CollectionUtils.isEmpty(fileList)) return null;

Multipart multipart = new MimeMultipart();

// 添加附件的内容

fileList.stream().parallel().forEach(file -> {

try {

BodyPart attachmentBodyPart = new MimeBodyPart();

DataSource source = new FileDataSource(file);

attachmentBodyPart.setDataHandler(new DataHandler(source));

// MimeUtility.encodeWord可以避免文件名乱码

attachmentBodyPart.setFileName(MimeUtility.encodeWord(file.getName()));

multipart.addBodyPart(attachmentBodyPart);

} catch (Exception e) {

e.printStackTrace();

}

});

return multipart ;

}

private static Session getEmailSession(){

// 配置发送邮件的环境属性

Properties props = new Properties();

//设置用户的认证方式

props.setProperty("mail.smtp.auth", "true");

//设置传输协议

props.setProperty("mail.transport.protocol", "smtp");

//设置发件人的SMTP服务器地址

props.setProperty("mail.smtp.host", "smtp.163.com");

// 构建授权信息，用于进行SMTP进行身份验证

Authenticator authenticator = new Authenticator() {

@Override

protected PasswordAuthentication getPasswordAuthentication() {

// 用户名、密码

return new PasswordAuthentication(SENDER_ADDRESS, SENDER_PWD);

}

};

return Session.getInstance(props, authenticator);

}

public static void main(String[] args) throws Exception {

sendEmail(Arrays.asList("XXX@qq.com", "XXX@163.com"), "我是标题", "我是内容", null);

}

}

转载带地址，谢谢！

对你有帮助的话，右上角给个赞呗~