基于Java实现简单的邮件群发功能（java实现邮件发送功能代码）

基于Java实现简单的邮件群发功能（java实现邮件发送功能代码）

目录pom文件引入第三方依赖java代码如下运行测试

pom文件引入第三方依赖

javax.mail

mail

1.4

org.projectlombok

lombok

true

java代码如下

import lombok.Data;

import javax.mail.Message.RecipientType;

import javax.mail.MessagingException;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.List;

import java.util.Properties;

/**

* Created by tarzan liu on 2021/5/9.

*/

public abstract class EmailUtil {

private static final Session session;

private static final EmailAuthenticator authenticator;

static {

InputStream inputStream = null;

try {

inputStream = EmailUtil.class.getResourceAsStream("/email.properties");

Properties properties = new Properties();

properties.load(inputStream);

authenticator = new EmailAuthenticator();

String username = properties.getProperty("email.username");

authenticator.setUsername(username);

String password = properties.getProperty("email.password");

authenticator.setPassword(password);

String smtpHostName = "smtp." + username.split("@")[1];

properties.put("mail.smtp.auth", "true");

properties.put("mail.smtp.host", smtpHostName);

sesshttp://ion = Session.getInstance(properties, authenticator);

} catch (Exception e) {

throw new RuntimeException("init error.");

} finally {

if (inputStream != null) {

try {

inputStream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

private EmailUtil() { }

/**

* 群发邮件方法

*/

private static void massSend(List recipients, SimpleEmail email) throws MessagingException {

MimeMessage message = new MimeMessage(session);

message.setFrom(new InternetAddress(authenticator.getUsername()));

InternetAddress[] addresses = new InternetAddress[recipients.size()];

for (int index = 0; index < recipients.size(); index ++) {

addresses[index] = new InternetAddress(recipients.get(index));

}

message.setRecipients(RecipientType.TO, addresses);

message.setSubject(email.getSubject());

message.setContent(email.getContent(), "text/html;charset=utf-8");

Transport.send(message);

}

/**

* 发送邮件

*/

public static void send(String recipient, SimpleEmail email) throws MessagingException {

List recipients = new ArrayList<>();

recipients.add(recipient);

massSend(recipients, email);

}

//可以单独建一个类

@Data

public static class SimpleEmail {

private String subject;

private String content;

}

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

SimpleEmail simpleEmail = new SimpleEmail();

simpleEmail.setSubject("今天你学习了么？");

simpleEmail.setContent("今天你写博客了么");

send("1334512682@qq.com", simpleEmail);

}

}

email.properties 系统邮箱配置

email.username=###@163.comemail.password=###

你的邮箱账号和密码，也可以省去配置文件，直接把账号密码写死在代码。

运行测试

右键run 运行主方法。

将发送的邮箱绑定到微信上，还能实现微信提醒功能！

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