目录
pom文件引入第三方依赖
<dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4</version> </dependency> <!--lombok--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency>
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); session = 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<String> 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<String> 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.com
email.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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